Refactor code structure and remove redundant changes

django-backend/api/v1/__init__.py

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+"""
+API v1 package.
+"""

django-backend/api/v1/api.py

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+"""
+Main API v1 router.
+
+This module combines all endpoint routers and provides the main API interface.
+"""
+from ninja import NinjaAPI
+from ninja.security import django_auth
+
+from .endpoints.companies import router as companies_router
+from .endpoints.ride_models import router as ride_models_router
+from .endpoints.parks import router as parks_router
+from .endpoints.rides import router as rides_router
+from .endpoints.moderation import router as moderation_router
+from .endpoints.auth import router as auth_router
+from .endpoints.photos import router as photos_router
+from .endpoints.search import router as search_router
+from .endpoints.reviews import router as reviews_router
+from .endpoints.ride_credits import router as ride_credits_router
+from .endpoints.top_lists import router as top_lists_router
+from .endpoints.history import router as history_router
+from .endpoints.timeline import router as timeline_router
+from .endpoints.reports import router as reports_router
+from .endpoints.seo import router as seo_router
+from .endpoints.contact import router as contact_router
+
+
+# Create the main API instance
+api = NinjaAPI(
+    title="ThrillWiki API",
+    version="1.0.0",
+    description="""
+# ThrillWiki REST API
+
+A comprehensive API for amusement park, ride, and company data.
+
+## Features
+
+- **Companies**: Manufacturers, operators, and designers in the amusement industry
+- **Ride Models**: Specific ride models from manufacturers
+- **Parks**: Theme parks, amusement parks, water parks, and FECs
+- **Rides**: Individual rides and roller coasters
+
+## Authentication
+
+The API uses JWT (JSON Web Token) authentication for secure access.
+
+### Getting Started
+1. Register: `POST /api/v1/auth/register`
+2. Login: `POST /api/v1/auth/login` (returns access & refresh tokens)
+3. Use token: Include `Authorization: Bearer <access_token>` header in requests
+4. Refresh: `POST /api/v1/auth/token/refresh` when access token expires
+
+### Permissions
+- **Public**: Read operations (GET) on entities
+- **Authenticated**: Create submissions, manage own profile
+- **Moderator**: Approve/reject submissions, moderate content
+- **Admin**: Full access, user management, role assignment
+
+### Optional: Multi-Factor Authentication (MFA)
+Users can enable TOTP-based 2FA for enhanced security:
+1. Enable: `POST /api/v1/auth/mfa/enable`
+2. Confirm: `POST /api/v1/auth/mfa/confirm`
+3. Login with MFA: Include `mfa_token` in login request
+
+## Pagination
+
+List endpoints return paginated results:
+- Default page size: 50 items
+- Use `page` parameter to navigate (e.g., `?page=2`)
+
+## Filtering & Search
+
+Most list endpoints support filtering and search parameters.
+See individual endpoint documentation for available filters.
+
+## Geographic Search
+
+The parks endpoint includes a special `/parks/nearby/` endpoint for geographic searches:
+- **Production (PostGIS)**: Uses accurate distance-based queries
+- **Local Development (SQLite)**: Uses bounding box approximation
+
+## Rate Limiting
+
+Rate limiting will be implemented in future versions.
+
+## Data Format
+
+All dates are in ISO 8601 format (YYYY-MM-DD).
+All timestamps are in ISO 8601 format with timezone.
+UUIDs are used for all entity IDs.
+    """,
+    docs_url="/docs",
+    openapi_url="/openapi.json",
+)
+
+# Add authentication router
+api.add_router("/auth", auth_router)
+
+# Add routers for each entity
+api.add_router("/companies", companies_router)
+api.add_router("/ride-models", ride_models_router)
+api.add_router("/parks", parks_router)
+api.add_router("/rides", rides_router)
+
+# Add moderation router
+api.add_router("/moderation", moderation_router)
+
+# Add photos router
+api.add_router("", photos_router)  # Photos endpoints include both /photos and entity-nested routes
+
+# Add search router
+api.add_router("/search", search_router)
+
+# Add user interaction routers
+api.add_router("/reviews", reviews_router)
+api.add_router("/ride-credits", ride_credits_router)
+api.add_router("/top-lists", top_lists_router)
+
+# Add history router
+api.add_router("/history", history_router)
+
+# Add timeline router
+api.add_router("/timeline", timeline_router)
+
+# Add reports router
+api.add_router("/reports", reports_router)
+
+# Add SEO router
+api.add_router("/seo", seo_router)
+
+# Add contact router
+api.add_router("/contact", contact_router)
+
+
+# Health check endpoint
+@api.get("/health", tags=["System"], summary="Health check")
+def health_check(request):
+    """
+    Health check endpoint.
+    
+    Returns system status and API version.
+    """
+    return {
+        "status": "healthy",
+        "version": "1.0.0",
+        "api": "ThrillWiki API v1"
+    }
+
+
+# API info endpoint
+@api.get("/info", tags=["System"], summary="API information")
+def api_info(request):
+    """
+    Get API information and statistics.
+    
+    Returns basic API metadata and available endpoints.
+    """
+    from apps.entities.models import Company, RideModel, Park, Ride
+    
+    return {
+        "version": "1.0.0",
+        "title": "ThrillWiki API",
+        "endpoints": {
+            "auth": "/api/v1/auth/",
+            "companies": "/api/v1/companies/",
+            "ride_models": "/api/v1/ride-models/",
+            "parks": "/api/v1/parks/",
+            "rides": "/api/v1/rides/",
+            "moderation": "/api/v1/moderation/",
+            "photos": "/api/v1/photos/",
+            "search": "/api/v1/search/",
+        },
+        "statistics": {
+            "companies": Company.objects.count(),
+            "ride_models": RideModel.objects.count(),
+            "parks": Park.objects.count(),
+            "rides": Ride.objects.count(),
+            "coasters": Ride.objects.filter(is_coaster=True).count(),
+        },
+        "documentation": "/api/v1/docs",
+        "openapi_schema": "/api/v1/openapi.json",
+    }

django-backend/api/v1/endpoints/__init__.py

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+"""
+API v1 endpoints package.
+"""

django-backend/api/v1/endpoints/auth.py

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+"""
+Authentication API endpoints.
+
+Provides endpoints for:
+- User registration and login
+- JWT token management
+- MFA/2FA
+- Password management
+- User profile and preferences
+- User administration
+"""
+
+from typing import List, Optional
+from django.http import HttpRequest
+from django.core.exceptions import ValidationError, PermissionDenied
+from django.db.models import Q
+from ninja import Router
+from rest_framework_simplejwt.tokens import RefreshToken
+from rest_framework_simplejwt.exceptions import TokenError
+import logging
+
+from apps.users.models import User, UserRole, UserProfile
+from apps.users.services import (
+    AuthenticationService,
+    MFAService,
+    RoleService,
+    UserManagementService
+)
+from apps.users.permissions import (
+    jwt_auth,
+    require_auth,
+    require_admin,
+    get_permission_checker
+)
+from api.v1.schemas import (
+    UserRegisterRequest,
+    UserLoginRequest,
+    TokenResponse,
+    TokenRefreshRequest,
+    UserProfileOut,
+    UserProfileUpdate,
+    ChangePasswordRequest,
+    ResetPasswordRequest,
+    TOTPEnableResponse,
+    TOTPConfirmRequest,
+    TOTPVerifyRequest,
+    UserRoleOut,
+    UserPermissionsOut,
+    UserStatsOut,
+    UserProfilePreferencesOut,
+    UserProfilePreferencesUpdate,
+    BanUserRequest,
+    UnbanUserRequest,
+    AssignRoleRequest,
+    UserListOut,
+    MessageSchema,
+    ErrorSchema,
+)
+
+router = Router(tags=["Authentication"])
+logger = logging.getLogger(__name__)
+
+
+# ============================================================================
+# Public Authentication Endpoints
+# ============================================================================
+
+@router.post("/register", response={201: UserProfileOut, 400: ErrorSchema})
+def register(request: HttpRequest, data: UserRegisterRequest):
+    """
+    Register a new user account.
+    
+    - **email**: User's email address (required)
+    - **password**: Password (min 8 characters, required)
+    - **password_confirm**: Password confirmation (required)
+    - **username**: Username (optional, auto-generated if not provided)
+    - **first_name**: First name (optional)
+    - **last_name**: Last name (optional)
+    
+    Returns the created user profile and automatically logs in the user.
+    """
+    try:
+        # Register user
+        user = AuthenticationService.register_user(
+            email=data.email,
+            password=data.password,
+            username=data.username,
+            first_name=data.first_name or '',
+            last_name=data.last_name or ''
+        )
+        
+        logger.info(f"New user registered: {user.email}")
+        return 201, user
+        
+    except ValidationError as e:
+        error_msg = str(e.message_dict) if hasattr(e, 'message_dict') else str(e)
+        return 400, {"error": "Registration failed", "detail": error_msg}
+    except Exception as e:
+        logger.error(f"Registration error: {e}")
+        return 400, {"error": "Registration failed", "detail": str(e)}
+
+
+@router.post("/login", response={200: TokenResponse, 401: ErrorSchema})
+def login(request: HttpRequest, data: UserLoginRequest):
+    """
+    Login with email and password.
+    
+    - **email**: User's email address
+    - **password**: Password
+    - **mfa_token**: MFA token (required if MFA is enabled)
+    
+    Returns JWT access and refresh tokens on successful authentication.
+    """
+    try:
+        # Authenticate user
+        user = AuthenticationService.authenticate_user(data.email, data.password)
+        
+        if not user:
+            return 401, {"error": "Invalid credentials", "detail": "Email or password is incorrect"}
+        
+        # Check MFA if enabled
+        if user.mfa_enabled:
+            if not data.mfa_token:
+                return 401, {"error": "MFA required", "detail": "Please provide MFA token"}
+            
+            if not MFAService.verify_totp(user, data.mfa_token):
+                return 401, {"error": "Invalid MFA token", "detail": "The MFA token is invalid"}
+        
+        # Generate tokens
+        refresh = RefreshToken.for_user(user)
+        
+        return 200, {
+            "access": str(refresh.access_token),
+            "refresh": str(refresh),
+            "token_type": "Bearer"
+        }
+        
+    except ValidationError as e:
+        return 401, {"error": "Authentication failed", "detail": str(e)}
+    except Exception as e:
+        logger.error(f"Login error: {e}")
+        return 401, {"error": "Authentication failed", "detail": str(e)}
+
+
+@router.post("/token/refresh", response={200: TokenResponse, 401: ErrorSchema})
+def refresh_token(request: HttpRequest, data: TokenRefreshRequest):
+    """
+    Refresh JWT access token using refresh token.
+    
+    - **refresh**: Refresh token
+    
+    Returns new access token and optionally a new refresh token.
+    """
+    try:
+        refresh = RefreshToken(data.refresh)
+        
+        return 200, {
+            "access": str(refresh.access_token),
+            "refresh": str(refresh),
+            "token_type": "Bearer"
+        }
+        
+    except TokenError as e:
+        return 401, {"error": "Invalid token", "detail": str(e)}
+    except Exception as e:
+        logger.error(f"Token refresh error: {e}")
+        return 401, {"error": "Token refresh failed", "detail": str(e)}
+
+
+@router.post("/logout", auth=jwt_auth, response={200: MessageSchema})
+@require_auth
+def logout(request: HttpRequest):
+    """
+    Logout (blacklist refresh token).
+    
+    Note: Requires authentication. The client should also discard the access token.
+    """
+    # Note: Token blacklisting is handled by djangorestframework-simplejwt
+    # when BLACKLIST_AFTER_ROTATION is True in settings
+    return 200, {"message": "Logged out successfully", "success": True}
+
+
+# ============================================================================
+# User Profile Endpoints
+# ============================================================================
+
+@router.get("/me", auth=jwt_auth, response={200: UserProfileOut, 401: ErrorSchema})
+@require_auth
+def get_my_profile(request: HttpRequest):
+    """
+    Get current user's profile.
+    
+    Returns detailed profile information for the authenticated user.
+    """
+    user = request.auth
+    return 200, user
+
+
+@router.patch("/me", auth=jwt_auth, response={200: UserProfileOut, 400: ErrorSchema})
+@require_auth
+def update_my_profile(request: HttpRequest, data: UserProfileUpdate):
+    """
+    Update current user's profile.
+    
+    - **first_name**: First name (optional)
+    - **last_name**: Last name (optional)
+    - **username**: Username (optional)
+    - **bio**: User biography (optional, max 500 characters)
+    - **avatar_url**: Avatar image URL (optional)
+    """
+    try:
+        user = request.auth
+        
+        # Prepare update data
+        update_data = data.dict(exclude_unset=True)
+        
+        # Update profile
+        updated_user = UserManagementService.update_profile(user, **update_data)
+        
+        return 200, updated_user
+        
+    except ValidationError as e:
+        return 400, {"error": "Update failed", "detail": str(e)}
+    except Exception as e:
+        logger.error(f"Profile update error: {e}")
+        return 400, {"error": "Update failed", "detail": str(e)}
+
+
+@router.get("/me/role", auth=jwt_auth, response={200: UserRoleOut, 404: ErrorSchema})
+@require_auth
+def get_my_role(request: HttpRequest):
+    """
+    Get current user's role.
+    
+    Returns role information including permissions.
+    """
+    try:
+        user = request.auth
+        role = user.role
+        
+        response_data = {
+            "role": role.role,
+            "is_moderator": role.is_moderator,
+            "is_admin": role.is_admin,
+            "granted_at": role.granted_at,
+            "granted_by_email": role.granted_by.email if role.granted_by else None
+        }
+        
+        return 200, response_data
+        
+    except UserRole.DoesNotExist:
+        return 404, {"error": "Role not found", "detail": "User role not assigned"}
+
+
+@router.get("/me/permissions", auth=jwt_auth, response={200: UserPermissionsOut})
+@require_auth
+def get_my_permissions(request: HttpRequest):
+    """
+    Get current user's permissions.
+    
+    Returns a summary of what the user can do.
+    """
+    user = request.auth
+    permissions = RoleService.get_user_permissions(user)
+    return 200, permissions
+
+
+@router.get("/me/stats", auth=jwt_auth, response={200: UserStatsOut})
+@require_auth
+def get_my_stats(request: HttpRequest):
+    """
+    Get current user's statistics.
+    
+    Returns submission stats, reputation score, and activity information.
+    """
+    user = request.auth
+    stats = UserManagementService.get_user_stats(user)
+    return 200, stats
+
+
+# ============================================================================
+# User Preferences Endpoints
+# ============================================================================
+
+@router.get("/me/preferences", auth=jwt_auth, response={200: UserProfilePreferencesOut})
+@require_auth
+def get_my_preferences(request: HttpRequest):
+    """
+    Get current user's preferences.
+    
+    Returns notification and privacy preferences.
+    """
+    user = request.auth
+    profile = user.profile
+    return 200, profile
+
+
+@router.patch("/me/preferences", auth=jwt_auth, response={200: UserProfilePreferencesOut, 400: ErrorSchema})
+@require_auth
+def update_my_preferences(request: HttpRequest, data: UserProfilePreferencesUpdate):
+    """
+    Update current user's preferences.
+    
+    - **email_notifications**: Receive email notifications
+    - **email_on_submission_approved**: Email when submissions approved
+    - **email_on_submission_rejected**: Email when submissions rejected
+    - **profile_public**: Make profile publicly visible
+    - **show_email**: Show email on public profile
+    """
+    try:
+        user = request.auth
+        
+        # Prepare update data
+        update_data = data.dict(exclude_unset=True)
+        
+        # Update preferences
+        updated_profile = UserManagementService.update_preferences(user, **update_data)
+        
+        return 200, updated_profile
+        
+    except Exception as e:
+        logger.error(f"Preferences update error: {e}")
+        return 400, {"error": "Update failed", "detail": str(e)}
+
+
+# ============================================================================
+# Password Management Endpoints
+# ============================================================================
+
+@router.post("/password/change", auth=jwt_auth, response={200: MessageSchema, 400: ErrorSchema})
+@require_auth
+def change_password(request: HttpRequest, data: ChangePasswordRequest):
+    """
+    Change current user's password.
+    
+    - **old_password**: Current password (required)
+    - **new_password**: New password (min 8 characters, required)
+    - **new_password_confirm**: New password confirmation (required)
+    """
+    try:
+        user = request.auth
+        
+        AuthenticationService.change_password(
+            user=user,
+            old_password=data.old_password,
+            new_password=data.new_password
+        )
+        
+        return 200, {"message": "Password changed successfully", "success": True}
+        
+    except ValidationError as e:
+        error_msg = str(e.message_dict) if hasattr(e, 'message_dict') else str(e)
+        return 400, {"error": "Password change failed", "detail": error_msg}
+
+
+@router.post("/password/reset", response={200: MessageSchema})
+def request_password_reset(request: HttpRequest, data: ResetPasswordRequest):
+    """
+    Request password reset email.
+    
+    - **email**: User's email address
+    
+    Note: This is a placeholder. In production, this should send a reset email.
+    For now, it returns success regardless of whether the email exists.
+    """
+    # TODO: Implement email sending with password reset token
+    # For security, always return success even if email doesn't exist
+    return 200, {
+        "message": "If the email exists, a password reset link has been sent",
+        "success": True
+    }
+
+
+# ============================================================================
+# MFA/2FA Endpoints
+# ============================================================================
+
+@router.post("/mfa/enable", auth=jwt_auth, response={200: TOTPEnableResponse, 400: ErrorSchema})
+@require_auth
+def enable_mfa(request: HttpRequest):
+    """
+    Enable MFA/2FA for current user.
+    
+    Returns TOTP secret and QR code URL for authenticator apps.
+    User must confirm with a valid token to complete setup.
+    """
+    try:
+        user = request.auth
+        
+        # Create TOTP device
+        device = MFAService.enable_totp(user)
+        
+        # Generate QR code URL
+        issuer = "ThrillWiki"
+        qr_url = device.config_url
+        
+        return 200, {
+            "secret": device.key,
+            "qr_code_url": qr_url,
+            "backup_codes": []  # TODO: Generate backup codes
+        }
+        
+    except Exception as e:
+        logger.error(f"MFA enable error: {e}")
+        return 400, {"error": "MFA setup failed", "detail": str(e)}
+
+
+@router.post("/mfa/confirm", auth=jwt_auth, response={200: MessageSchema, 400: ErrorSchema})
+@require_auth
+def confirm_mfa(request: HttpRequest, data: TOTPConfirmRequest):
+    """
+    Confirm MFA setup with verification token.
+    
+    - **token**: 6-digit TOTP token from authenticator app
+    
+    Completes MFA setup after verifying the token is valid.
+    """
+    try:
+        user = request.auth
+        
+        MFAService.confirm_totp(user, data.token)
+        
+        return 200, {"message": "MFA enabled successfully", "success": True}
+        
+    except ValidationError as e:
+        return 400, {"error": "Confirmation failed", "detail": str(e)}
+
+
+@router.post("/mfa/disable", auth=jwt_auth, response={200: MessageSchema})
+@require_auth
+def disable_mfa(request: HttpRequest):
+    """
+    Disable MFA/2FA for current user.
+    
+    Removes all TOTP devices and disables MFA requirement.
+    """
+    user = request.auth
+    MFAService.disable_totp(user)
+    
+    return 200, {"message": "MFA disabled successfully", "success": True}
+
+
+@router.post("/mfa/verify", auth=jwt_auth, response={200: MessageSchema, 400: ErrorSchema})
+@require_auth
+def verify_mfa_token(request: HttpRequest, data: TOTPVerifyRequest):
+    """
+    Verify MFA token (for testing).
+    
+    - **token**: 6-digit TOTP token
+    
+    Returns whether the token is valid.
+    """
+    user = request.auth
+    
+    if MFAService.verify_totp(user, data.token):
+        return 200, {"message": "Token is valid", "success": True}
+    else:
+        return 400, {"error": "Invalid token", "detail": "The token is not valid"}
+
+
+# ============================================================================
+# User Management Endpoints (Admin Only)
+# ============================================================================
+
+@router.get("/users", auth=jwt_auth, response={200: UserListOut, 403: ErrorSchema})
+@require_admin
+def list_users(
+    request: HttpRequest,
+    page: int = 1,
+    page_size: int = 50,
+    search: Optional[str] = None,
+    role: Optional[str] = None,
+    banned: Optional[bool] = None
+):
+    """
+    List all users (admin only).
+    
+    - **page**: Page number (default: 1)
+    - **page_size**: Items per page (default: 50, max: 100)
+    - **search**: Search by email or username
+    - **role**: Filter by role (user, moderator, admin)
+    - **banned**: Filter by banned status
+    """
+    # Build query
+    queryset = User.objects.select_related('role').all()
+    
+    # Apply filters
+    if search:
+        queryset = queryset.filter(
+            Q(email__icontains=search) |
+            Q(username__icontains=search) |
+            Q(first_name__icontains=search) |
+            Q(last_name__icontains=search)
+        )
+    
+    if role:
+        queryset = queryset.filter(role__role=role)
+    
+    if banned is not None:
+        queryset = queryset.filter(banned=banned)
+    
+    # Pagination
+    page_size = min(page_size, 100)  # Max 100 items per page
+    total = queryset.count()
+    total_pages = (total + page_size - 1) // page_size
+    
+    start = (page - 1) * page_size
+    end = start + page_size
+    
+    users = list(queryset[start:end])
+    
+    return 200, {
+        "items": users,
+        "total": total,
+        "page": page,
+        "page_size": page_size,
+        "total_pages": total_pages
+    }
+
+
+@router.get("/users/{user_id}", auth=jwt_auth, response={200: UserProfileOut, 404: ErrorSchema})
+@require_admin
+def get_user(request: HttpRequest, user_id: str):
+    """
+    Get user by ID (admin only).
+    
+    Returns detailed profile information for the specified user.
+    """
+    try:
+        user = User.objects.get(id=user_id)
+        return 200, user
+    except User.DoesNotExist:
+        return 404, {"error": "User not found", "detail": f"No user with ID {user_id}"}
+
+
+@router.post("/users/ban", auth=jwt_auth, response={200: MessageSchema, 400: ErrorSchema})
+@require_admin
+def ban_user(request: HttpRequest, data: BanUserRequest):
+    """
+    Ban a user (admin only).
+    
+    - **user_id**: User ID to ban
+    - **reason**: Reason for ban
+    """
+    try:
+        user = User.objects.get(id=data.user_id)
+        admin = request.auth
+        
+        UserManagementService.ban_user(user, data.reason, admin)
+        
+        return 200, {"message": f"User {user.email} has been banned", "success": True}
+        
+    except User.DoesNotExist:
+        return 400, {"error": "User not found", "detail": f"No user with ID {data.user_id}"}
+
+
+@router.post("/users/unban", auth=jwt_auth, response={200: MessageSchema, 400: ErrorSchema})
+@require_admin
+def unban_user(request: HttpRequest, data: UnbanUserRequest):
+    """
+    Unban a user (admin only).
+    
+    - **user_id**: User ID to unban
+    """
+    try:
+        user = User.objects.get(id=data.user_id)
+        
+        UserManagementService.unban_user(user)
+        
+        return 200, {"message": f"User {user.email} has been unbanned", "success": True}
+        
+    except User.DoesNotExist:
+        return 400, {"error": "User not found", "detail": f"No user with ID {data.user_id}"}
+
+
+@router.post("/users/assign-role", auth=jwt_auth, response={200: MessageSchema, 400: ErrorSchema})
+@require_admin
+def assign_role(request: HttpRequest, data: AssignRoleRequest):
+    """
+    Assign role to user (admin only).
+    
+    - **user_id**: User ID
+    - **role**: Role to assign (user, moderator, admin)
+    """
+    try:
+        user = User.objects.get(id=data.user_id)
+        admin = request.auth
+        
+        RoleService.assign_role(user, data.role, admin)
+        
+        return 200, {"message": f"Role '{data.role}' assigned to {user.email}", "success": True}
+        
+    except User.DoesNotExist:
+        return 400, {"error": "User not found", "detail": f"No user with ID {data.user_id}"}
+    except ValidationError as e:
+        return 400, {"error": "Invalid role", "detail": str(e)}

django-backend/api/v1/endpoints/companies.py

@@ -0,0 +1,650 @@
+"""
+Company endpoints for API v1.
+
+Provides CRUD operations for Company entities with filtering and search.
+"""
+from typing import List, Optional
+from uuid import UUID
+from django.shortcuts import get_object_or_404
+from django.db.models import Q
+from ninja import Router, Query
+from ninja.pagination import paginate, PageNumberPagination
+
+from apps.entities.models import Company
+from apps.entities.services.company_submission import CompanySubmissionService
+from apps.users.permissions import jwt_auth, require_auth
+from ..schemas import (
+    CompanyCreate,
+    CompanyUpdate,
+    CompanyOut,
+    CompanyListOut,
+    ErrorResponse,
+    HistoryListResponse,
+    HistoryEventDetailSchema,
+    HistoryComparisonSchema,
+    HistoryDiffCurrentSchema,
+    FieldHistorySchema,
+    HistoryActivitySummarySchema,
+    RollbackRequestSchema,
+    RollbackResponseSchema,
+    ErrorSchema
+)
+from ..services.history_service import HistoryService
+from django.core.exceptions import ValidationError
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+router = Router(tags=["Companies"])
+
+
+class CompanyPagination(PageNumberPagination):
+    """Custom pagination for companies."""
+    page_size = 50
+
+
+@router.get(
+    "/",
+    response={200: List[CompanyOut]},
+    summary="List companies",
+    description="Get a paginated list of companies with optional filtering"
+)
+@paginate(CompanyPagination)
+def list_companies(
+    request,
+    search: Optional[str] = Query(None, description="Search by company name"),
+    company_type: Optional[str] = Query(None, description="Filter by company type"),
+    location_id: Optional[UUID] = Query(None, description="Filter by location"),
+    ordering: Optional[str] = Query("-created", description="Sort by field (prefix with - for descending)")
+):
+    """
+    List all companies with optional filters.
+    
+    **Filters:**
+    - search: Search company names (case-insensitive partial match)
+    - company_type: Filter by specific company type
+    - location_id: Filter by headquarters location
+    - ordering: Sort results (default: -created)
+    
+    **Returns:** Paginated list of companies
+    """
+    queryset = Company.objects.all()
+    
+    # Apply search filter
+    if search:
+        queryset = queryset.filter(
+            Q(name__icontains=search) | Q(description__icontains=search)
+        )
+    
+    # Apply company type filter
+    if company_type:
+        queryset = queryset.filter(company_types__contains=[company_type])
+    
+    # Apply location filter
+    if location_id:
+        queryset = queryset.filter(location_id=location_id)
+    
+    # Apply ordering
+    valid_order_fields = ['name', 'created', 'modified', 'founded_date', 'park_count', 'ride_count']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    return queryset
+
+
+@router.get(
+    "/{company_id}",
+    response={200: CompanyOut, 404: ErrorResponse},
+    summary="Get company",
+    description="Retrieve a single company by ID"
+)
+def get_company(request, company_id: UUID):
+    """
+    Get a company by ID.
+    
+    **Parameters:**
+    - company_id: UUID of the company
+    
+    **Returns:** Company details
+    """
+    company = get_object_or_404(Company, id=company_id)
+    return company
+
+
+@router.post(
+    "/",
+    response={201: CompanyOut, 202: dict, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Create company",
+    description="Create a new company through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def create_company(request, payload: CompanyCreate):
+    """
+    Create a new company through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - payload: Company data (name, company_types, headquarters, etc.)
+    
+    **Returns:** Created company (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Company created immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All companies flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        
+        # Create company through Sacred Pipeline
+        submission, company = CompanySubmissionService.create_entity_submission(
+            user=user,
+            data=payload.dict(),
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, Company was created immediately
+        if company:
+            logger.info(f"Company created (moderator): {company.id} by {user.email}")
+            return 201, company
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Company submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Company submission pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error creating company: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.put(
+    "/{company_id}",
+    response={200: CompanyOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Update company",
+    description="Update an existing company through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def update_company(request, company_id: UUID, payload: CompanyUpdate):
+    """
+    Update a company through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - company_id: UUID of the company
+    - payload: Updated company data
+    
+    **Returns:** Updated company (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Updates applied immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All updates flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        company = get_object_or_404(Company, id=company_id)
+        
+        data = payload.dict(exclude_unset=True)
+        
+        # Update company through Sacred Pipeline
+        submission, updated_company = CompanySubmissionService.update_entity_submission(
+            entity=company,
+            user=user,
+            update_data=data,
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, company was updated immediately
+        if updated_company:
+            logger.info(f"Company updated (moderator): {updated_company.id} by {user.email}")
+            return 200, updated_company
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Company update submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Company update pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error updating company: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.patch(
+    "/{company_id}",
+    response={200: CompanyOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Partial update company",
+    description="Partially update an existing company through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def partial_update_company(request, company_id: UUID, payload: CompanyUpdate):
+    """
+    Partially update a company through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - company_id: UUID of the company
+    - payload: Fields to update (only provided fields are updated)
+    
+    **Returns:** Updated company (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Updates applied immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All updates flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        company = get_object_or_404(Company, id=company_id)
+        
+        data = payload.dict(exclude_unset=True)
+        
+        # Update company through Sacred Pipeline
+        submission, updated_company = CompanySubmissionService.update_entity_submission(
+            entity=company,
+            user=user,
+            update_data=data,
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, company was updated immediately
+        if updated_company:
+            logger.info(f"Company partially updated (moderator): {updated_company.id} by {user.email}")
+            return 200, updated_company
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Company partial update submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Company update pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error partially updating company: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.delete(
+    "/{company_id}",
+    response={200: dict, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Delete company",
+    description="Delete a company through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def delete_company(request, company_id: UUID):
+    """
+    Delete a company through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - company_id: UUID of the company
+    
+    **Returns:** Deletion confirmation (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Company hard-deleted immediately (removed from database)
+    - Regular users: Deletion request created, enters moderation queue
+    
+    **Deletion Strategy:**
+    - Hard Delete: Removes company from database (Company has no status field for soft delete)
+    
+    **Note:** All deletions flow through ContentSubmission pipeline for moderation.
+    **Warning:** Deleting a company may affect related parks and rides.
+    """
+    try:
+        user = request.auth
+        company = get_object_or_404(Company, id=company_id)
+        
+        # Delete company through Sacred Pipeline (hard delete - no status field)
+        submission, deleted = CompanySubmissionService.delete_entity_submission(
+            entity=company,
+            user=user,
+            deletion_type='hard',  # Company has no status field
+            deletion_reason='',
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, deletion was applied immediately
+        if deleted:
+            logger.info(f"Company deleted (moderator): {company_id} by {user.email}")
+            return 200, {
+                'message': 'Company deleted successfully',
+                'entity_id': str(company_id),
+                'deletion_type': 'hard'
+            }
+        
+        # Regular user: deletion pending moderation
+        logger.info(f"Company deletion submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Company deletion request pending moderation. You will be notified when it is approved.',
+            'entity_id': str(company_id)
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error deleting company: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.get(
+    "/{company_id}/parks",
+    response={200: List[dict], 404: ErrorResponse},
+    summary="Get company parks",
+    description="Get all parks operated by a company"
+)
+def get_company_parks(request, company_id: UUID):
+    """
+    Get parks operated by a company.
+    
+    **Parameters:**
+    - company_id: UUID of the company
+    
+    **Returns:** List of parks
+    """
+    company = get_object_or_404(Company, id=company_id)
+    parks = company.operated_parks.all().values('id', 'name', 'slug', 'status', 'park_type')
+    return list(parks)
+
+
+@router.get(
+    "/{company_id}/rides",
+    response={200: List[dict], 404: ErrorResponse},
+    summary="Get company rides",
+    description="Get all rides manufactured by a company"
+)
+def get_company_rides(request, company_id: UUID):
+    """
+    Get rides manufactured by a company.
+    
+    **Parameters:**
+    - company_id: UUID of the company
+    
+    **Returns:** List of rides
+    """
+    company = get_object_or_404(Company, id=company_id)
+    rides = company.manufactured_rides.all().values('id', 'name', 'slug', 'status', 'ride_category')
+    return list(rides)
+
+
+# ============================================================================
+# History Endpoints
+# ============================================================================
+
+@router.get(
+    '/{company_id}/history/',
+    response={200: HistoryListResponse, 404: ErrorSchema},
+    summary="Get company history",
+    description="Get historical changes for a company"
+)
+def get_company_history(
+    request,
+    company_id: UUID,
+    page: int = Query(1, ge=1),
+    page_size: int = Query(50, ge=1, le=100),
+    date_from: Optional[str] = Query(None, description="Filter from date (YYYY-MM-DD)"),
+    date_to: Optional[str] = Query(None, description="Filter to date (YYYY-MM-DD)")
+):
+    """Get history for a company."""
+    from datetime import datetime
+    
+    # Verify company exists
+    company = get_object_or_404(Company, id=company_id)
+    
+    # Parse dates if provided
+    date_from_obj = datetime.fromisoformat(date_from).date() if date_from else None
+    date_to_obj = datetime.fromisoformat(date_to).date() if date_to else None
+    
+    # Get history
+    offset = (page - 1) * page_size
+    events, accessible_count = HistoryService.get_history(
+        'company', str(company_id), request.user,
+        date_from=date_from_obj, date_to=date_to_obj,
+        limit=page_size, offset=offset
+    )
+    
+    # Format events
+    formatted_events = []
+    for event in events:
+        formatted_events.append({
+            'id': event['id'],
+            'timestamp': event['timestamp'],
+            'operation': event['operation'],
+            'snapshot': event['snapshot'],
+            'changed_fields': event.get('changed_fields'),
+            'change_summary': event.get('change_summary', ''),
+            'can_rollback': HistoryService.can_rollback(request.user)
+        })
+    
+    # Calculate pagination
+    total_pages = (accessible_count + page_size - 1) // page_size
+    
+    return {
+        'entity_id': str(company_id),
+        'entity_type': 'company',
+        'entity_name': company.name,
+        'total_events': accessible_count,
+        'accessible_events': accessible_count,
+        'access_limited': HistoryService.is_access_limited(request.user),
+        'access_reason': HistoryService.get_access_reason(request.user),
+        'events': formatted_events,
+        'pagination': {
+            'page': page,
+            'page_size': page_size,
+            'total_pages': total_pages,
+            'total_items': accessible_count
+        }
+    }
+
+
+@router.get(
+    '/{company_id}/history/{event_id}/',
+    response={200: HistoryEventDetailSchema, 404: ErrorSchema},
+    summary="Get specific company history event",
+    description="Get detailed information about a specific historical event"
+)
+def get_company_history_event(request, company_id: UUID, event_id: int):
+    """Get a specific history event for a company."""
+    company = get_object_or_404(Company, id=company_id)
+    event = HistoryService.get_event('company', event_id, request.user)
+    
+    if not event:
+        return 404, {"error": "Event not found or not accessible"}
+    
+    return {
+        'id': event['id'],
+        'timestamp': event['timestamp'],
+        'operation': event['operation'],
+        'entity_id': str(company_id),
+        'entity_type': 'company',
+        'entity_name': company.name,
+        'snapshot': event['snapshot'],
+        'changed_fields': event.get('changed_fields'),
+        'metadata': event.get('metadata', {}),
+        'can_rollback': HistoryService.can_rollback(request.user),
+        'rollback_preview': None
+    }
+
+
+@router.get(
+    '/{company_id}/history/compare/',
+    response={200: HistoryComparisonSchema, 400: ErrorSchema, 404: ErrorSchema},
+    summary="Compare two company history events",
+    description="Compare two historical events for a company"
+)
+def compare_company_history(
+    request,
+    company_id: UUID,
+    event1: int = Query(..., description="First event ID"),
+    event2: int = Query(..., description="Second event ID")
+):
+    """Compare two historical events for a company."""
+    company = get_object_or_404(Company, id=company_id)
+    
+    try:
+        comparison = HistoryService.compare_events(
+            'company', event1, event2, request.user
+        )
+        
+        if not comparison:
+            return 404, {"error": "One or both events not found"}
+        
+        return {
+            'entity_id': str(company_id),
+            'entity_type': 'company',
+            'entity_name': company.name,
+            'event1': comparison['event1'],
+            'event2': comparison['event2'],
+            'differences': comparison['differences'],
+            'changed_field_count': comparison['changed_field_count'],
+            'unchanged_field_count': comparison['unchanged_field_count'],
+            'time_between': comparison['time_between']
+        }
+    except ValueError as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{company_id}/history/{event_id}/diff-current/',
+    response={200: HistoryDiffCurrentSchema, 404: ErrorSchema},
+    summary="Compare historical event with current state",
+    description="Compare a historical event with the current company state"
+)
+def diff_company_history_with_current(request, company_id: UUID, event_id: int):
+    """Compare historical event with current company state."""
+    company = get_object_or_404(Company, id=company_id)
+    
+    try:
+        diff = HistoryService.compare_with_current(
+            'company', event_id, company, request.user
+        )
+        
+        if not diff:
+            return 404, {"error": "Event not found"}
+        
+        return {
+            'entity_id': str(company_id),
+            'entity_type': 'company',
+            'entity_name': company.name,
+            'event': diff['event'],
+            'current_state': diff['current_state'],
+            'differences': diff['differences'],
+            'changed_field_count': diff['changed_field_count'],
+            'time_since': diff['time_since']
+        }
+    except ValueError as e:
+        return 404, {"error": str(e)}
+
+
+@router.post(
+    '/{company_id}/history/{event_id}/rollback/',
+    response={200: RollbackResponseSchema, 400: ErrorSchema, 403: ErrorSchema},
+    summary="Rollback company to historical state",
+    description="Rollback company to a historical state (Moderators/Admins only)"
+)
+def rollback_company(request, company_id: UUID, event_id: int, payload: RollbackRequestSchema):
+    """
+    Rollback company to a historical state.
+    
+    **Permission:** Moderators, Admins, Superusers only
+    """
+    # Check authentication
+    if not request.user or not request.user.is_authenticated:
+        return 401, {"error": "Authentication required"}
+    
+    # Check rollback permission
+    if not HistoryService.can_rollback(request.user):
+        return 403, {"error": "Only moderators and administrators can perform rollbacks"}
+    
+    company = get_object_or_404(Company, id=company_id)
+    
+    try:
+        result = HistoryService.rollback_to_event(
+            company, 'company', event_id, request.user,
+            fields=payload.fields,
+            comment=payload.comment,
+            create_backup=payload.create_backup
+        )
+        return result
+    except (ValueError, PermissionError) as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{company_id}/history/field/{field_name}/',
+    response={200: FieldHistorySchema, 404: ErrorSchema},
+    summary="Get field-specific history",
+    description="Get history of changes to a specific company field"
+)
+def get_company_field_history(request, company_id: UUID, field_name: str):
+    """Get history of changes to a specific company field."""
+    company = get_object_or_404(Company, id=company_id)
+    
+    history = HistoryService.get_field_history(
+        'company', str(company_id), field_name, request.user
+    )
+    
+    return {
+        'entity_id': str(company_id),
+        'entity_type': 'company',
+        'entity_name': company.name,
+        'field': field_name,
+        'field_type': 'CharField',  # Could introspect this
+        **history
+    }
+
+
+@router.get(
+    '/{company_id}/history/summary/',
+    response={200: HistoryActivitySummarySchema, 404: ErrorSchema},
+    summary="Get company activity summary",
+    description="Get activity summary for a company"
+)
+def get_company_activity_summary(request, company_id: UUID):
+    """Get activity summary for a company."""
+    company = get_object_or_404(Company, id=company_id)
+    
+    summary = HistoryService.get_activity_summary(
+        'company', str(company_id), request.user
+    )
+    
+    return {
+        'entity_id': str(company_id),
+        'entity_type': 'company',
+        'entity_name': company.name,
+        **summary
+    }

django-backend/api/v1/endpoints/contact.py

@@ -0,0 +1,330 @@
+"""
+Contact submission API endpoints.
+Handles user contact form submissions and admin management.
+"""
+from typing import Optional
+from uuid import UUID
+from ninja import Router
+from django.db.models import Q, Count, Avg
+from django.utils import timezone
+from datetime import timedelta
+
+from apps.contact.models import ContactSubmission
+from apps.contact.tasks import send_contact_confirmation_email, notify_admins_new_contact, send_contact_resolution_email
+from apps.users.permissions import require_role
+from api.v1.schemas import (
+    ContactSubmissionCreate,
+    ContactSubmissionUpdate,
+    ContactSubmissionOut,
+    ContactSubmissionListOut,
+    ContactSubmissionStatsOut,
+    MessageSchema,
+    ErrorSchema,
+)
+
+
+router = Router(tags=["Contact"])
+
+
+# ============================================================================
+# Public Endpoints
+# ============================================================================
+
+@router.post("/submit", response={200: ContactSubmissionOut, 400: ErrorSchema})
+def submit_contact_form(request, data: ContactSubmissionCreate):
+    """
+    Submit a contact form.
+    Available to both authenticated and anonymous users.
+    """
+    try:
+        # Create the contact submission
+        contact = ContactSubmission.objects.create(
+            name=data.name,
+            email=data.email,
+            subject=data.subject,
+            message=data.message,
+            category=data.category,
+            user=request.auth if request.auth else None
+        )
+        
+        # Send confirmation email to user
+        send_contact_confirmation_email.delay(str(contact.id))
+        
+        # Notify admins
+        notify_admins_new_contact.delay(str(contact.id))
+        
+        # Prepare response
+        response = ContactSubmissionOut.from_orm(contact)
+        response.user_email = contact.user.email if contact.user else None
+        
+        return 200, response
+        
+    except Exception as e:
+        return 400, {"error": "Failed to submit contact form", "detail": str(e)}
+
+
+# ============================================================================
+# Admin/Moderator Endpoints
+# ============================================================================
+
+@router.get("/", response={200: ContactSubmissionListOut, 403: ErrorSchema})
+@require_role(['moderator', 'admin'])
+def list_contact_submissions(
+    request,
+    page: int = 1,
+    page_size: int = 20,
+    status: Optional[str] = None,
+    category: Optional[str] = None,
+    assigned_to_me: bool = False,
+    search: Optional[str] = None
+):
+    """
+    List contact submissions (moderators/admins only).
+    Supports filtering and pagination.
+    """
+    queryset = ContactSubmission.objects.all()
+    
+    # Apply filters
+    if status:
+        queryset = queryset.filter(status=status)
+    
+    if category:
+        queryset = queryset.filter(category=category)
+    
+    if assigned_to_me and request.auth:
+        queryset = queryset.filter(assigned_to=request.auth)
+    
+    if search:
+        queryset = queryset.filter(
+            Q(ticket_number__icontains=search) |
+            Q(name__icontains=search) |
+            Q(email__icontains=search) |
+            Q(subject__icontains=search) |
+            Q(message__icontains=search)
+        )
+    
+    # Get total count
+    total = queryset.count()
+    
+    # Apply pagination
+    start = (page - 1) * page_size
+    end = start + page_size
+    contacts = queryset[start:end]
+    
+    # Prepare response
+    items = []
+    for contact in contacts:
+        item = ContactSubmissionOut.from_orm(contact)
+        item.user_email = contact.user.email if contact.user else None
+        item.assigned_to_email = contact.assigned_to.email if contact.assigned_to else None
+        item.resolved_by_email = contact.resolved_by.email if contact.resolved_by else None
+        items.append(item)
+    
+    return {
+        "items": items,
+        "total": total,
+        "page": page,
+        "page_size": page_size,
+        "total_pages": (total + page_size - 1) // page_size
+    }
+
+
+@router.get("/{contact_id}", response={200: ContactSubmissionOut, 404: ErrorSchema, 403: ErrorSchema})
+@require_role(['moderator', 'admin'])
+def get_contact_submission(request, contact_id: UUID):
+    """
+    Get a specific contact submission by ID (moderators/admins only).
+    """
+    try:
+        contact = ContactSubmission.objects.get(id=contact_id)
+        
+        response = ContactSubmissionOut.from_orm(contact)
+        response.user_email = contact.user.email if contact.user else None
+        response.assigned_to_email = contact.assigned_to.email if contact.assigned_to else None
+        response.resolved_by_email = contact.resolved_by.email if contact.resolved_by else None
+        
+        return 200, response
+        
+    except ContactSubmission.DoesNotExist:
+        return 404, {"error": "Contact submission not found"}
+
+
+@router.patch("/{contact_id}", response={200: ContactSubmissionOut, 404: ErrorSchema, 400: ErrorSchema, 403: ErrorSchema})
+@require_role(['moderator', 'admin'])
+def update_contact_submission(request, contact_id: UUID, data: ContactSubmissionUpdate):
+    """
+    Update a contact submission (moderators/admins only).
+    Used to change status, assign, or add notes.
+    """
+    try:
+        contact = ContactSubmission.objects.get(id=contact_id)
+        
+        # Track if status changed to resolved
+        status_changed_to_resolved = False
+        old_status = contact.status
+        
+        # Update fields
+        if data.status is not None:
+            contact.status = data.status
+            if data.status == 'resolved' and old_status != 'resolved':
+                status_changed_to_resolved = True
+                contact.resolved_by = request.auth
+                contact.resolved_at = timezone.now()
+        
+        if data.assigned_to_id is not None:
+            from apps.users.models import User
+            try:
+                contact.assigned_to = User.objects.get(id=data.assigned_to_id)
+            except User.DoesNotExist:
+                return 400, {"error": "Invalid user ID for assignment"}
+        
+        if data.admin_notes is not None:
+            contact.admin_notes = data.admin_notes
+        
+        contact.save()
+        
+        # Send resolution email if status changed to resolved
+        if status_changed_to_resolved:
+            send_contact_resolution_email.delay(str(contact.id))
+        
+        # Prepare response
+        response = ContactSubmissionOut.from_orm(contact)
+        response.user_email = contact.user.email if contact.user else None
+        response.assigned_to_email = contact.assigned_to.email if contact.assigned_to else None
+        response.resolved_by_email = contact.resolved_by.email if contact.resolved_by else None
+        
+        return 200, response
+        
+    except ContactSubmission.DoesNotExist:
+        return 404, {"error": "Contact submission not found"}
+    except Exception as e:
+        return 400, {"error": "Failed to update contact submission", "detail": str(e)}
+
+
+@router.post("/{contact_id}/assign-to-me", response={200: MessageSchema, 404: ErrorSchema, 403: ErrorSchema})
+@require_role(['moderator', 'admin'])
+def assign_to_me(request, contact_id: UUID):
+    """
+    Assign a contact submission to the current user (moderators/admins only).
+    """
+    try:
+        contact = ContactSubmission.objects.get(id=contact_id)
+        contact.assigned_to = request.auth
+        contact.save()
+        
+        return 200, {
+            "message": f"Contact submission {contact.ticket_number} assigned to you",
+            "success": True
+        }
+        
+    except ContactSubmission.DoesNotExist:
+        return 404, {"error": "Contact submission not found"}
+
+
+@router.post("/{contact_id}/mark-resolved", response={200: MessageSchema, 404: ErrorSchema, 403: ErrorSchema})
+@require_role(['moderator', 'admin'])
+def mark_resolved(request, contact_id: UUID):
+    """
+    Mark a contact submission as resolved (moderators/admins only).
+    """
+    try:
+        contact = ContactSubmission.objects.get(id=contact_id)
+        
+        if contact.status == 'resolved':
+            return 200, {
+                "message": f"Contact submission {contact.ticket_number} is already resolved",
+                "success": True
+            }
+        
+        contact.status = 'resolved'
+        contact.resolved_by = request.auth
+        contact.resolved_at = timezone.now()
+        contact.save()
+        
+        # Send resolution email
+        send_contact_resolution_email.delay(str(contact.id))
+        
+        return 200, {
+            "message": f"Contact submission {contact.ticket_number} marked as resolved",
+            "success": True
+        }
+        
+    except ContactSubmission.DoesNotExist:
+        return 404, {"error": "Contact submission not found"}
+
+
+@router.get("/stats/overview", response={200: ContactSubmissionStatsOut, 403: ErrorSchema})
+@require_role(['moderator', 'admin'])
+def get_contact_stats(request):
+    """
+    Get contact submission statistics (moderators/admins only).
+    """
+    # Get counts by status
+    total_submissions = ContactSubmission.objects.count()
+    pending_submissions = ContactSubmission.objects.filter(status='pending').count()
+    in_progress_submissions = ContactSubmission.objects.filter(status='in_progress').count()
+    resolved_submissions = ContactSubmission.objects.filter(status='resolved').count()
+    archived_submissions = ContactSubmission.objects.filter(status='archived').count()
+    
+    # Get counts by category
+    submissions_by_category = dict(
+        ContactSubmission.objects.values('category').annotate(
+            count=Count('id')
+        ).values_list('category', 'count')
+    )
+    
+    # Calculate average resolution time
+    resolved_contacts = ContactSubmission.objects.filter(
+        status='resolved',
+        resolved_at__isnull=False
+    ).exclude(created_at=None)
+    
+    avg_resolution_time = None
+    if resolved_contacts.exists():
+        total_time = sum([
+            (contact.resolved_at - contact.created_at).total_seconds() / 3600
+            for contact in resolved_contacts
+        ])
+        avg_resolution_time = total_time / resolved_contacts.count()
+    
+    # Get recent submissions
+    recent = ContactSubmission.objects.order_by('-created_at')[:5]
+    recent_submissions = []
+    for contact in recent:
+        item = ContactSubmissionOut.from_orm(contact)
+        item.user_email = contact.user.email if contact.user else None
+        item.assigned_to_email = contact.assigned_to.email if contact.assigned_to else None
+        item.resolved_by_email = contact.resolved_by.email if contact.resolved_by else None
+        recent_submissions.append(item)
+    
+    return {
+        "total_submissions": total_submissions,
+        "pending_submissions": pending_submissions,
+        "in_progress_submissions": in_progress_submissions,
+        "resolved_submissions": resolved_submissions,
+        "archived_submissions": archived_submissions,
+        "submissions_by_category": submissions_by_category,
+        "average_resolution_time_hours": avg_resolution_time,
+        "recent_submissions": recent_submissions
+    }
+
+
+@router.delete("/{contact_id}", response={200: MessageSchema, 404: ErrorSchema, 403: ErrorSchema})
+@require_role(['admin'])
+def delete_contact_submission(request, contact_id: UUID):
+    """
+    Delete a contact submission (admins only).
+    Use with caution - typically should archive instead.
+    """
+    try:
+        contact = ContactSubmission.objects.get(id=contact_id)
+        ticket_number = contact.ticket_number
+        contact.delete()
+        
+        return 200, {
+            "message": f"Contact submission {ticket_number} deleted",
+            "success": True
+        }
+        
+    except ContactSubmission.DoesNotExist:
+        return 404, {"error": "Contact submission not found"}

django-backend/api/v1/endpoints/history.py

@@ -0,0 +1,100 @@
+"""
+Generic history endpoints for all entity types.
+
+Provides cross-entity history operations and utilities.
+"""
+
+from typing import Optional
+from uuid import UUID
+from django.shortcuts import get_object_or_404
+from django.http import Http404
+from ninja import Router, Query
+
+from api.v1.services.history_service import HistoryService
+from api.v1.schemas import (
+    HistoryEventDetailSchema,
+    HistoryComparisonSchema,
+    ErrorSchema
+)
+
+router = Router(tags=['History'])
+
+
+@router.get(
+    '/events/{event_id}',
+    response={200: HistoryEventDetailSchema, 404: ErrorSchema},
+    summary="Get event by ID",
+    description="Retrieve any historical event by its ID (requires entity_type parameter)"
+)
+def get_event_by_id(
+    request,
+    event_id: int,
+    entity_type: str = Query(..., description="Entity type (park, ride, company, ridemodel, review)")
+):
+    """Get a specific historical event by ID."""
+    try:
+        event = HistoryService.get_event(entity_type, event_id, request.user)
+        if not event:
+            return 404, {"error": "Event not found or not accessible"}
+        
+        # Get entity info for response
+        entity_id = str(event['entity_id'])
+        entity_name = event.get('entity_name', 'Unknown')
+        
+        # Build response
+        response_data = {
+            'id': event['id'],
+            'timestamp': event['timestamp'],
+            'operation': event['operation'],
+            'entity_id': entity_id,
+            'entity_type': entity_type,
+            'entity_name': entity_name,
+            'snapshot': event['snapshot'],
+            'changed_fields': event.get('changed_fields'),
+            'metadata': event.get('metadata', {}),
+            'can_rollback': HistoryService.can_rollback(request.user),
+            'rollback_preview': None  # Could add rollback preview logic if needed
+        }
+        
+        return response_data
+    except ValueError as e:
+        return 404, {"error": str(e)}
+
+
+@router.get(
+    '/compare',
+    response={200: HistoryComparisonSchema, 400: ErrorSchema, 404: ErrorSchema},
+    summary="Compare two events",
+    description="Compare two historical events (must be same entity)"
+)
+def compare_events(
+    request,
+    entity_type: str = Query(..., description="Entity type (park, ride, company, ridemodel, review)"),
+    event1: int = Query(..., description="First event ID"),
+    event2: int = Query(..., description="Second event ID")
+):
+    """Compare two historical events."""
+    try:
+        comparison = HistoryService.compare_events(
+            entity_type, event1, event2, request.user
+        )
+        
+        if not comparison:
+            return 404, {"error": "One or both events not found or not accessible"}
+        
+        # Format response
+        response_data = {
+            'entity_id': comparison['entity_id'],
+            'entity_type': entity_type,
+            'entity_name': comparison.get('entity_name', 'Unknown'),
+            'event1': comparison['event1'],
+            'event2': comparison['event2'],
+            'differences': comparison['differences'],
+            'changed_field_count': comparison['changed_field_count'],
+            'unchanged_field_count': comparison['unchanged_field_count'],
+            'time_between': comparison['time_between']
+        }
+        
+        return response_data
+    except ValueError as e:
+        return 400, {"error": str(e)}

django-backend/api/v1/endpoints/moderation.py

@@ -0,0 +1,550 @@
+"""
+Moderation API endpoints.
+
+Provides REST API for content submission and moderation workflow.
+"""
+from typing import List, Optional
+from uuid import UUID
+from ninja import Router
+from django.shortcuts import get_object_or_404
+from django.contrib.contenttypes.models import ContentType
+from django.core.exceptions import ValidationError, PermissionDenied
+
+from apps.moderation.models import ContentSubmission, SubmissionItem
+from apps.moderation.services import ModerationService
+from apps.users.permissions import jwt_auth, require_auth
+from api.v1.schemas import (
+    ContentSubmissionCreate,
+    ContentSubmissionOut,
+    ContentSubmissionDetail,
+    SubmissionListOut,
+    StartReviewRequest,
+    ApproveRequest,
+    ApproveSelectiveRequest,
+    RejectRequest,
+    RejectSelectiveRequest,
+    ApprovalResponse,
+    SelectiveApprovalResponse,
+    SelectiveRejectionResponse,
+    ErrorResponse,
+)
+
+router = Router(tags=['Moderation'])
+
+
+# ============================================================================
+# Helper Functions
+# ============================================================================
+
+def _submission_to_dict(submission: ContentSubmission) -> dict:
+    """Convert submission model to dict for schema."""
+    return {
+        'id': submission.id,
+        'status': submission.status,
+        'submission_type': submission.submission_type,
+        'title': submission.title,
+        'description': submission.description or '',
+        'entity_type': submission.entity_type.model,
+        'entity_id': submission.entity_id,
+        'user_id': submission.user.id,
+        'user_email': submission.user.email,
+        'locked_by_id': submission.locked_by.id if submission.locked_by else None,
+        'locked_by_email': submission.locked_by.email if submission.locked_by else None,
+        'locked_at': submission.locked_at,
+        'reviewed_by_id': submission.reviewed_by.id if submission.reviewed_by else None,
+        'reviewed_by_email': submission.reviewed_by.email if submission.reviewed_by else None,
+        'reviewed_at': submission.reviewed_at,
+        'rejection_reason': submission.rejection_reason or '',
+        'source': submission.source,
+        'metadata': submission.metadata,
+        'items_count': submission.get_items_count(),
+        'approved_items_count': submission.get_approved_items_count(),
+        'rejected_items_count': submission.get_rejected_items_count(),
+        'created': submission.created,
+        'modified': submission.modified,
+    }
+
+
+def _item_to_dict(item: SubmissionItem) -> dict:
+    """Convert submission item model to dict for schema."""
+    return {
+        'id': item.id,
+        'submission_id': item.submission.id,
+        'field_name': item.field_name,
+        'field_label': item.field_label or item.field_name,
+        'old_value': item.old_value,
+        'new_value': item.new_value,
+        'change_type': item.change_type,
+        'is_required': item.is_required,
+        'order': item.order,
+        'status': item.status,
+        'reviewed_by_id': item.reviewed_by.id if item.reviewed_by else None,
+        'reviewed_by_email': item.reviewed_by.email if item.reviewed_by else None,
+        'reviewed_at': item.reviewed_at,
+        'rejection_reason': item.rejection_reason or '',
+        'old_value_display': item.old_value_display,
+        'new_value_display': item.new_value_display,
+        'created': item.created,
+        'modified': item.modified,
+    }
+
+
+def _get_entity(entity_type: str, entity_id: UUID):
+    """Get entity instance from type string and ID."""
+    # Map entity type strings to models
+    type_map = {
+        'park': 'entities.Park',
+        'ride': 'entities.Ride',
+        'company': 'entities.Company',
+        'ridemodel': 'entities.RideModel',
+    }
+    
+    app_label, model = type_map.get(entity_type.lower(), '').split('.')
+    content_type = ContentType.objects.get(app_label=app_label, model=model.lower())
+    model_class = content_type.model_class()
+    
+    return get_object_or_404(model_class, id=entity_id)
+
+
+# ============================================================================
+# Submission Endpoints
+# ============================================================================
+
+@router.post('/submissions', response={201: ContentSubmissionOut, 400: ErrorResponse, 401: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def create_submission(request, data: ContentSubmissionCreate):
+    """
+    Create a new content submission.
+    
+    Creates a submission with multiple items representing field changes.
+    If auto_submit is True, the submission is immediately moved to pending state.
+    
+    **Authentication:** Required
+    """
+    user = request.auth
+    
+    if not user or not user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    try:
+        # Get entity
+        entity = _get_entity(data.entity_type, data.entity_id)
+        
+        # Prepare items data
+        items_data = [
+            {
+                'field_name': item.field_name,
+                'field_label': item.field_label,
+                'old_value': item.old_value,
+                'new_value': item.new_value,
+                'change_type': item.change_type,
+                'is_required': item.is_required,
+                'order': item.order,
+            }
+            for item in data.items
+        ]
+        
+        # Create submission
+        submission = ModerationService.create_submission(
+            user=user,
+            entity=entity,
+            submission_type=data.submission_type,
+            title=data.title,
+            description=data.description or '',
+            items_data=items_data,
+            metadata=data.metadata,
+            auto_submit=data.auto_submit,
+            source='api'
+        )
+        
+        return 201, _submission_to_dict(submission)
+        
+    except Exception as e:
+        return 400, {'detail': str(e)}
+
+
+@router.get('/submissions', response=SubmissionListOut)
+def list_submissions(
+    request,
+    status: Optional[str] = None,
+    page: int = 1,
+    page_size: int = 50
+):
+    """
+    List content submissions with optional filtering.
+    
+    Query Parameters:
+    - status: Filter by status (draft, pending, reviewing, approved, rejected)
+    - page: Page number (default: 1)
+    - page_size: Items per page (default: 50, max: 100)
+    """
+    # Validate page_size
+    page_size = min(page_size, 100)
+    offset = (page - 1) * page_size
+    
+    # Get submissions
+    submissions = ModerationService.get_queue(
+        status=status,
+        limit=page_size,
+        offset=offset
+    )
+    
+    # Get total count
+    total_queryset = ContentSubmission.objects.all()
+    if status:
+        total_queryset = total_queryset.filter(status=status)
+    total = total_queryset.count()
+    
+    # Calculate total pages
+    total_pages = (total + page_size - 1) // page_size
+    
+    # Convert to dicts
+    items = [_submission_to_dict(sub) for sub in submissions]
+    
+    return {
+        'items': items,
+        'total': total,
+        'page': page,
+        'page_size': page_size,
+        'total_pages': total_pages,
+    }
+
+
+@router.get('/submissions/{submission_id}', response={200: ContentSubmissionDetail, 404: ErrorResponse})
+def get_submission(request, submission_id: UUID):
+    """
+    Get detailed submission information with all items.
+    """
+    try:
+        submission = ModerationService.get_submission_details(submission_id)
+        
+        # Convert to dict with items
+        data = _submission_to_dict(submission)
+        data['items'] = [_item_to_dict(item) for item in submission.items.all()]
+        
+        return 200, data
+        
+    except ContentSubmission.DoesNotExist:
+        return 404, {'detail': 'Submission not found'}
+
+
+@router.delete('/submissions/{submission_id}', response={204: None, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def delete_submission(request, submission_id: UUID):
+    """
+    Delete a submission (only if draft/pending and owned by user).
+    
+    **Authentication:** Required
+    """
+    user = request.auth
+    
+    if not user or not user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    try:
+        ModerationService.delete_submission(submission_id, user)
+        return 204, None
+        
+    except ContentSubmission.DoesNotExist:
+        return 404, {'detail': 'Submission not found'}
+    except PermissionDenied as e:
+        return 403, {'detail': str(e)}
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+
+
+# ============================================================================
+# Review Endpoints
+# ============================================================================
+
+@router.post(
+    '/submissions/{submission_id}/start-review',
+    response={200: ContentSubmissionOut, 400: ErrorResponse, 403: ErrorResponse, 404: ErrorResponse},
+    auth=jwt_auth
+)
+@require_auth
+def start_review(request, submission_id: UUID, data: StartReviewRequest):
+    """
+    Start reviewing a submission (lock it for 15 minutes).
+    
+    Only moderators can start reviews.
+    
+    **Authentication:** Required (Moderator role)
+    """
+    user = request.auth
+    
+    if not user or not user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    # Check moderator permission
+    if not hasattr(user, 'role') or not user.role.is_moderator:
+        return 403, {'detail': 'Moderator permission required'}
+    
+    try:
+        submission = ModerationService.start_review(submission_id, user)
+        return 200, _submission_to_dict(submission)
+        
+    except ContentSubmission.DoesNotExist:
+        return 404, {'detail': 'Submission not found'}
+    except PermissionDenied as e:
+        return 403, {'detail': str(e)}
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+
+
+@router.post(
+    '/submissions/{submission_id}/approve',
+    response={200: ApprovalResponse, 400: ErrorResponse, 403: ErrorResponse, 404: ErrorResponse},
+    auth=jwt_auth
+)
+@require_auth
+def approve_submission(request, submission_id: UUID, data: ApproveRequest):
+    """
+    Approve an entire submission and apply all changes.
+    
+    Uses atomic transactions - all changes are applied or none are.
+    Only moderators can approve submissions.
+    
+    **Authentication:** Required (Moderator role)
+    """
+    user = request.auth
+    
+    if not user or not user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    # Check moderator permission
+    if not hasattr(user, 'role') or not user.role.is_moderator:
+        return 403, {'detail': 'Moderator permission required'}
+    
+    try:
+        submission = ModerationService.approve_submission(submission_id, user)
+        
+        return 200, {
+            'success': True,
+            'message': 'Submission approved successfully',
+            'submission': _submission_to_dict(submission)
+        }
+        
+    except ContentSubmission.DoesNotExist:
+        return 404, {'detail': 'Submission not found'}
+    except PermissionDenied as e:
+        return 403, {'detail': str(e)}
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+
+
+@router.post(
+    '/submissions/{submission_id}/approve-selective',
+    response={200: SelectiveApprovalResponse, 400: ErrorResponse, 403: ErrorResponse, 404: ErrorResponse},
+    auth=jwt_auth
+)
+@require_auth
+def approve_selective(request, submission_id: UUID, data: ApproveSelectiveRequest):
+    """
+    Approve only specific items in a submission.
+    
+    Allows moderators to approve some changes while leaving others pending or rejected.
+    Uses atomic transactions for data integrity.
+    
+    **Authentication:** Required (Moderator role)
+    """
+    user = request.auth
+    
+    if not user or not user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    # Check moderator permission
+    if not hasattr(user, 'role') or not user.role.is_moderator:
+        return 403, {'detail': 'Moderator permission required'}
+    
+    try:
+        result = ModerationService.approve_selective(
+            submission_id,
+            user,
+            [str(item_id) for item_id in data.item_ids]
+        )
+        
+        return 200, {
+            'success': True,
+            'message': f"Approved {result['approved']} of {result['total']} items",
+            **result
+        }
+        
+    except ContentSubmission.DoesNotExist:
+        return 404, {'detail': 'Submission not found'}
+    except PermissionDenied as e:
+        return 403, {'detail': str(e)}
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+
+
+@router.post(
+    '/submissions/{submission_id}/reject',
+    response={200: ApprovalResponse, 400: ErrorResponse, 403: ErrorResponse, 404: ErrorResponse},
+    auth=jwt_auth
+)
+@require_auth
+def reject_submission(request, submission_id: UUID, data: RejectRequest):
+    """
+    Reject an entire submission.
+    
+    All pending items are rejected with the provided reason.
+    Only moderators can reject submissions.
+    
+    **Authentication:** Required (Moderator role)
+    """
+    user = request.auth
+    
+    if not user or not user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    # Check moderator permission
+    if not hasattr(user, 'role') or not user.role.is_moderator:
+        return 403, {'detail': 'Moderator permission required'}
+    
+    try:
+        submission = ModerationService.reject_submission(submission_id, user, data.reason)
+        
+        return 200, {
+            'success': True,
+            'message': 'Submission rejected',
+            'submission': _submission_to_dict(submission)
+        }
+        
+    except ContentSubmission.DoesNotExist:
+        return 404, {'detail': 'Submission not found'}
+    except PermissionDenied as e:
+        return 403, {'detail': str(e)}
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+
+
+@router.post(
+    '/submissions/{submission_id}/reject-selective',
+    response={200: SelectiveRejectionResponse, 400: ErrorResponse, 403: ErrorResponse, 404: ErrorResponse},
+    auth=jwt_auth
+)
+@require_auth
+def reject_selective(request, submission_id: UUID, data: RejectSelectiveRequest):
+    """
+    Reject only specific items in a submission.
+    
+    Allows moderators to reject some changes while leaving others pending or approved.
+    
+    **Authentication:** Required (Moderator role)
+    """
+    user = request.auth
+    
+    if not user or not user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    # Check moderator permission
+    if not hasattr(user, 'role') or not user.role.is_moderator:
+        return 403, {'detail': 'Moderator permission required'}
+    
+    try:
+        result = ModerationService.reject_selective(
+            submission_id,
+            user,
+            [str(item_id) for item_id in data.item_ids],
+            data.reason or ''
+        )
+        
+        return 200, {
+            'success': True,
+            'message': f"Rejected {result['rejected']} of {result['total']} items",
+            **result
+        }
+        
+    except ContentSubmission.DoesNotExist:
+        return 404, {'detail': 'Submission not found'}
+    except PermissionDenied as e:
+        return 403, {'detail': str(e)}
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+
+
+@router.post(
+    '/submissions/{submission_id}/unlock',
+    response={200: ContentSubmissionOut, 404: ErrorResponse}
+)
+def unlock_submission(request, submission_id: UUID):
+    """
+    Manually unlock a submission.
+    
+    Removes the review lock. Can be used by moderators or automatically by cleanup tasks.
+    """
+    try:
+        submission = ModerationService.unlock_submission(submission_id)
+        return 200, _submission_to_dict(submission)
+        
+    except ContentSubmission.DoesNotExist:
+        return 404, {'detail': 'Submission not found'}
+
+
+# ============================================================================
+# Queue Endpoints
+# ============================================================================
+
+@router.get('/queue/pending', response=SubmissionListOut)
+def get_pending_queue(request, page: int = 1, page_size: int = 50):
+    """
+    Get pending submissions queue.
+    
+    Returns all submissions awaiting review.
+    """
+    return list_submissions(request, status='pending', page=page, page_size=page_size)
+
+
+@router.get('/queue/reviewing', response=SubmissionListOut)
+def get_reviewing_queue(request, page: int = 1, page_size: int = 50):
+    """
+    Get submissions currently under review.
+    
+    Returns all submissions being reviewed by moderators.
+    """
+    return list_submissions(request, status='reviewing', page=page, page_size=page_size)
+
+
+@router.get('/queue/my-submissions', response=SubmissionListOut, auth=jwt_auth)
+@require_auth
+def get_my_submissions(request, page: int = 1, page_size: int = 50):
+    """
+    Get current user's submissions.
+    
+    Returns all submissions created by the authenticated user.
+    
+    **Authentication:** Required
+    """
+    user = request.auth
+    
+    if not user or not user.is_authenticated:
+        return {'items': [], 'total': 0, 'page': page, 'page_size': page_size, 'total_pages': 0}
+    
+    # Validate page_size
+    page_size = min(page_size, 100)
+    offset = (page - 1) * page_size
+    
+    # Get user's submissions
+    submissions = ModerationService.get_queue(
+        user=user,
+        limit=page_size,
+        offset=offset
+    )
+    
+    # Get total count
+    total = ContentSubmission.objects.filter(user=user).count()
+    
+    # Calculate total pages
+    total_pages = (total + page_size - 1) // page_size
+    
+    # Convert to dicts
+    items = [_submission_to_dict(sub) for sub in submissions]
+    
+    return {
+        'items': items,
+        'total': total,
+        'page': page,
+        'page_size': page_size,
+        'total_pages': total_pages,
+    }

django-backend/api/v1/endpoints/parks.py

@@ -0,0 +1,734 @@
+"""
+Park endpoints for API v1.
+
+Provides CRUD operations for Park entities with filtering, search, and geographic queries.
+Supports both SQLite (lat/lng) and PostGIS (location_point) modes.
+"""
+from typing import List, Optional
+from uuid import UUID
+from decimal import Decimal
+from django.shortcuts import get_object_or_404
+from django.db.models import Q
+from django.conf import settings
+from ninja import Router, Query
+from ninja.pagination import paginate, PageNumberPagination
+import math
+
+from apps.entities.models import Park, Company, _using_postgis
+from apps.entities.services.park_submission import ParkSubmissionService
+from apps.users.permissions import jwt_auth, require_auth
+from ..schemas import (
+    ParkCreate,
+    ParkUpdate,
+    ParkOut,
+    ParkListOut,
+    ErrorResponse,
+    HistoryListResponse,
+    HistoryEventDetailSchema,
+    HistoryComparisonSchema,
+    HistoryDiffCurrentSchema,
+    FieldHistorySchema,
+    HistoryActivitySummarySchema,
+    RollbackRequestSchema,
+    RollbackResponseSchema,
+    ErrorSchema
+)
+from ..services.history_service import HistoryService
+from django.core.exceptions import ValidationError
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+router = Router(tags=["Parks"])
+
+
+class ParkPagination(PageNumberPagination):
+    """Custom pagination for parks."""
+    page_size = 50
+
+
+@router.get(
+    "/",
+    response={200: List[ParkOut]},
+    summary="List parks",
+    description="Get a paginated list of parks with optional filtering"
+)
+@paginate(ParkPagination)
+def list_parks(
+    request,
+    search: Optional[str] = Query(None, description="Search by park name"),
+    park_type: Optional[str] = Query(None, description="Filter by park type"),
+    status: Optional[str] = Query(None, description="Filter by status"),
+    operator_id: Optional[UUID] = Query(None, description="Filter by operator"),
+    ordering: Optional[str] = Query("-created", description="Sort by field (prefix with - for descending)")
+):
+    """
+    List all parks with optional filters.
+    
+    **Filters:**
+    - search: Search park names (case-insensitive partial match)
+    - park_type: Filter by park type
+    - status: Filter by operational status
+    - operator_id: Filter by operator company
+    - ordering: Sort results (default: -created)
+    
+    **Returns:** Paginated list of parks
+    """
+    queryset = Park.objects.select_related('operator').all()
+    
+    # Apply search filter
+    if search:
+        queryset = queryset.filter(
+            Q(name__icontains=search) | Q(description__icontains=search)
+        )
+    
+    # Apply park type filter
+    if park_type:
+        queryset = queryset.filter(park_type=park_type)
+    
+    # Apply status filter
+    if status:
+        queryset = queryset.filter(status=status)
+    
+    # Apply operator filter
+    if operator_id:
+        queryset = queryset.filter(operator_id=operator_id)
+    
+    # Apply ordering
+    valid_order_fields = ['name', 'created', 'modified', 'opening_date', 'ride_count', 'coaster_count']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    # Annotate with operator name
+    for park in queryset:
+        park.operator_name = park.operator.name if park.operator else None
+    
+    return queryset
+
+
+@router.get(
+    "/{park_id}",
+    response={200: ParkOut, 404: ErrorResponse},
+    summary="Get park",
+    description="Retrieve a single park by ID"
+)
+def get_park(request, park_id: UUID):
+    """
+    Get a park by ID.
+    
+    **Parameters:**
+    - park_id: UUID of the park
+    
+    **Returns:** Park details
+    """
+    park = get_object_or_404(Park.objects.select_related('operator'), id=park_id)
+    park.operator_name = park.operator.name if park.operator else None
+    park.coordinates = park.coordinates
+    return park
+
+
+@router.get(
+    "/nearby/",
+    response={200: List[ParkOut]},
+    summary="Find nearby parks",
+    description="Find parks within a radius of given coordinates. Uses PostGIS in production, bounding box in SQLite."
+)
+def find_nearby_parks(
+    request,
+    latitude: float = Query(..., description="Latitude coordinate"),
+    longitude: float = Query(..., description="Longitude coordinate"),
+    radius: float = Query(50, description="Search radius in kilometers"),
+    limit: int = Query(50, description="Maximum number of results")
+):
+    """
+    Find parks near a geographic point.
+    
+    **Geographic Search Modes:**
+    - **PostGIS (Production)**: Uses accurate distance-based search with location_point field
+    - **SQLite (Local Dev)**: Uses bounding box approximation with latitude/longitude fields
+    
+    **Parameters:**
+    - latitude: Center point latitude
+    - longitude: Center point longitude
+    - radius: Search radius in kilometers (default: 50)
+    - limit: Maximum results to return (default: 50)
+    
+    **Returns:** List of nearby parks
+    """
+    if _using_postgis:
+        # Use PostGIS for accurate distance-based search
+        try:
+            from django.contrib.gis.measure import D
+            from django.contrib.gis.geos import Point
+            
+            user_point = Point(longitude, latitude, srid=4326)
+            nearby_parks = Park.objects.filter(
+                location_point__distance_lte=(user_point, D(km=radius))
+            ).select_related('operator')[:limit]
+        except Exception as e:
+            return {"detail": f"Geographic search error: {str(e)}"}, 500
+    else:
+        # Use bounding box approximation for SQLite
+        # Calculate rough bounding box (1 degree ≈ 111 km at equator)
+        lat_offset = radius / 111.0
+        lng_offset = radius / (111.0 * math.cos(math.radians(latitude)))
+        
+        min_lat = latitude - lat_offset
+        max_lat = latitude + lat_offset
+        min_lng = longitude - lng_offset
+        max_lng = longitude + lng_offset
+        
+        nearby_parks = Park.objects.filter(
+            latitude__gte=Decimal(str(min_lat)),
+            latitude__lte=Decimal(str(max_lat)),
+            longitude__gte=Decimal(str(min_lng)),
+            longitude__lte=Decimal(str(max_lng))
+        ).select_related('operator')[:limit]
+    
+    # Annotate results
+    results = []
+    for park in nearby_parks:
+        park.operator_name = park.operator.name if park.operator else None
+        park.coordinates = park.coordinates
+        results.append(park)
+    
+    return results
+
+
+@router.post(
+    "/",
+    response={201: ParkOut, 202: dict, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Create park",
+    description="Create a new park through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def create_park(request, payload: ParkCreate):
+    """
+    Create a new park through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - payload: Park data (name, park_type, operator, coordinates, etc.)
+    
+    **Returns:** Created park (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Park created immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All parks flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        
+        # Create park through Sacred Pipeline
+        submission, park = ParkSubmissionService.create_entity_submission(
+            user=user,
+            data=payload.dict(),
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, Park was created immediately
+        if park:
+            logger.info(f"Park created (moderator): {park.id} by {user.email}")
+            park.operator_name = park.operator.name if park.operator else None
+            park.coordinates = park.coordinates
+            return 201, park
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Park submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Park submission pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error creating park: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.put(
+    "/{park_id}",
+    response={200: ParkOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Update park",
+    description="Update an existing park through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def update_park(request, park_id: UUID, payload: ParkUpdate):
+    """
+    Update a park through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - park_id: UUID of the park
+    - payload: Updated park data
+    
+    **Returns:** Updated park (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Updates applied immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All updates flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        park = get_object_or_404(Park.objects.select_related('operator'), id=park_id)
+        
+        data = payload.dict(exclude_unset=True)
+        
+        # Handle coordinates separately
+        latitude = data.pop('latitude', None)
+        longitude = data.pop('longitude', None)
+        
+        # Update park through Sacred Pipeline
+        submission, updated_park = ParkSubmissionService.update_entity_submission(
+            entity=park,
+            user=user,
+            update_data=data,
+            latitude=latitude,
+            longitude=longitude,
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, park was updated immediately
+        if updated_park:
+            logger.info(f"Park updated (moderator): {updated_park.id} by {user.email}")
+            updated_park.operator_name = updated_park.operator.name if updated_park.operator else None
+            updated_park.coordinates = updated_park.coordinates
+            return 200, updated_park
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Park update submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Park update pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error updating park: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.patch(
+    "/{park_id}",
+    response={200: ParkOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Partial update park",
+    description="Partially update an existing park through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def partial_update_park(request, park_id: UUID, payload: ParkUpdate):
+    """
+    Partially update a park through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - park_id: UUID of the park
+    - payload: Fields to update (only provided fields are updated)
+    
+    **Returns:** Updated park (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Updates applied immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All updates flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        park = get_object_or_404(Park.objects.select_related('operator'), id=park_id)
+        
+        data = payload.dict(exclude_unset=True)
+        
+        # Handle coordinates separately
+        latitude = data.pop('latitude', None)
+        longitude = data.pop('longitude', None)
+        
+        # Update park through Sacred Pipeline
+        submission, updated_park = ParkSubmissionService.update_entity_submission(
+            entity=park,
+            user=user,
+            update_data=data,
+            latitude=latitude,
+            longitude=longitude,
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, park was updated immediately
+        if updated_park:
+            logger.info(f"Park partially updated (moderator): {updated_park.id} by {user.email}")
+            updated_park.operator_name = updated_park.operator.name if updated_park.operator else None
+            updated_park.coordinates = updated_park.coordinates
+            return 200, updated_park
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Park partial update submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Park update pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error partially updating park: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.delete(
+    "/{park_id}",
+    response={200: dict, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Delete park",
+    description="Delete a park through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def delete_park(request, park_id: UUID):
+    """
+    Delete a park through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - park_id: UUID of the park
+    
+    **Returns:** Deletion confirmation (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Park soft-deleted immediately (status set to 'closed')
+    - Regular users: Deletion request created, enters moderation queue
+    
+    **Deletion Strategy:**
+    - Soft Delete (default): Sets park status to 'closed', preserves data
+    - Hard Delete: Actually removes from database (moderators only)
+    
+    **Note:** All deletions flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        park = get_object_or_404(Park.objects.select_related('operator'), id=park_id)
+        
+        # Delete park through Sacred Pipeline (soft delete by default)
+        submission, deleted = ParkSubmissionService.delete_entity_submission(
+            entity=park,
+            user=user,
+            deletion_type='soft',  # Can be made configurable via query param
+            deletion_reason='',  # Can be provided in request body
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, deletion was applied immediately
+        if deleted:
+            logger.info(f"Park deleted (moderator): {park_id} by {user.email}")
+            return 200, {
+                'message': 'Park deleted successfully',
+                'entity_id': str(park_id),
+                'deletion_type': 'soft'
+            }
+        
+        # Regular user: deletion pending moderation
+        logger.info(f"Park deletion submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Park deletion request pending moderation. You will be notified when it is approved.',
+            'entity_id': str(park_id)
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error deleting park: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.get(
+    "/{park_id}/rides",
+    response={200: List[dict], 404: ErrorResponse},
+    summary="Get park rides",
+    description="Get all rides at a park"
+)
+def get_park_rides(request, park_id: UUID):
+    """
+    Get all rides at a park.
+    
+    **Parameters:**
+    - park_id: UUID of the park
+    
+    **Returns:** List of rides
+    """
+    park = get_object_or_404(Park, id=park_id)
+    rides = park.rides.select_related('manufacturer').all().values(
+        'id', 'name', 'slug', 'status', 'ride_category', 'is_coaster', 'manufacturer__name'
+    )
+    return list(rides)
+
+
+# ============================================================================
+# History Endpoints
+# ============================================================================
+
+@router.get(
+    '/{park_id}/history/',
+    response={200: HistoryListResponse, 404: ErrorSchema},
+    summary="Get park history",
+    description="Get historical changes for a park"
+)
+def get_park_history(
+    request,
+    park_id: UUID,
+    page: int = Query(1, ge=1),
+    page_size: int = Query(50, ge=1, le=100),
+    date_from: Optional[str] = Query(None, description="Filter from date (YYYY-MM-DD)"),
+    date_to: Optional[str] = Query(None, description="Filter to date (YYYY-MM-DD)")
+):
+    """Get history for a park."""
+    from datetime import datetime
+    
+    # Verify park exists
+    park = get_object_or_404(Park, id=park_id)
+    
+    # Parse dates if provided
+    date_from_obj = datetime.fromisoformat(date_from).date() if date_from else None
+    date_to_obj = datetime.fromisoformat(date_to).date() if date_to else None
+    
+    # Get history
+    offset = (page - 1) * page_size
+    events, accessible_count = HistoryService.get_history(
+        'park', str(park_id), request.user,
+        date_from=date_from_obj, date_to=date_to_obj,
+        limit=page_size, offset=offset
+    )
+    
+    # Format events
+    formatted_events = []
+    for event in events:
+        formatted_events.append({
+            'id': event['id'],
+            'timestamp': event['timestamp'],
+            'operation': event['operation'],
+            'snapshot': event['snapshot'],
+            'changed_fields': event.get('changed_fields'),
+            'change_summary': event.get('change_summary', ''),
+            'can_rollback': HistoryService.can_rollback(request.user)
+        })
+    
+    # Calculate pagination
+    total_pages = (accessible_count + page_size - 1) // page_size
+    
+    return {
+        'entity_id': str(park_id),
+        'entity_type': 'park',
+        'entity_name': park.name,
+        'total_events': accessible_count,
+        'accessible_events': accessible_count,
+        'access_limited': HistoryService.is_access_limited(request.user),
+        'access_reason': HistoryService.get_access_reason(request.user),
+        'events': formatted_events,
+        'pagination': {
+            'page': page,
+            'page_size': page_size,
+            'total_pages': total_pages,
+            'total_items': accessible_count
+        }
+    }
+
+
+@router.get(
+    '/{park_id}/history/{event_id}/',
+    response={200: HistoryEventDetailSchema, 404: ErrorSchema},
+    summary="Get specific park history event",
+    description="Get detailed information about a specific historical event"
+)
+def get_park_history_event(request, park_id: UUID, event_id: int):
+    """Get a specific history event for a park."""
+    park = get_object_or_404(Park, id=park_id)
+    event = HistoryService.get_event('park', event_id, request.user)
+    
+    if not event:
+        return 404, {"error": "Event not found or not accessible"}
+    
+    return {
+        'id': event['id'],
+        'timestamp': event['timestamp'],
+        'operation': event['operation'],
+        'entity_id': str(park_id),
+        'entity_type': 'park',
+        'entity_name': park.name,
+        'snapshot': event['snapshot'],
+        'changed_fields': event.get('changed_fields'),
+        'metadata': event.get('metadata', {}),
+        'can_rollback': HistoryService.can_rollback(request.user),
+        'rollback_preview': None
+    }
+
+
+@router.get(
+    '/{park_id}/history/compare/',
+    response={200: HistoryComparisonSchema, 400: ErrorSchema, 404: ErrorSchema},
+    summary="Compare two park history events",
+    description="Compare two historical events for a park"
+)
+def compare_park_history(
+    request,
+    park_id: UUID,
+    event1: int = Query(..., description="First event ID"),
+    event2: int = Query(..., description="Second event ID")
+):
+    """Compare two historical events for a park."""
+    park = get_object_or_404(Park, id=park_id)
+    
+    try:
+        comparison = HistoryService.compare_events(
+            'park', event1, event2, request.user
+        )
+        
+        if not comparison:
+            return 404, {"error": "One or both events not found"}
+        
+        return {
+            'entity_id': str(park_id),
+            'entity_type': 'park',
+            'entity_name': park.name,
+            'event1': comparison['event1'],
+            'event2': comparison['event2'],
+            'differences': comparison['differences'],
+            'changed_field_count': comparison['changed_field_count'],
+            'unchanged_field_count': comparison['unchanged_field_count'],
+            'time_between': comparison['time_between']
+        }
+    except ValueError as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{park_id}/history/{event_id}/diff-current/',
+    response={200: HistoryDiffCurrentSchema, 404: ErrorSchema},
+    summary="Compare historical event with current state",
+    description="Compare a historical event with the current park state"
+)
+def diff_park_history_with_current(request, park_id: UUID, event_id: int):
+    """Compare historical event with current park state."""
+    park = get_object_or_404(Park, id=park_id)
+    
+    try:
+        diff = HistoryService.compare_with_current(
+            'park', event_id, park, request.user
+        )
+        
+        if not diff:
+            return 404, {"error": "Event not found"}
+        
+        return {
+            'entity_id': str(park_id),
+            'entity_type': 'park',
+            'entity_name': park.name,
+            'event': diff['event'],
+            'current_state': diff['current_state'],
+            'differences': diff['differences'],
+            'changed_field_count': diff['changed_field_count'],
+            'time_since': diff['time_since']
+        }
+    except ValueError as e:
+        return 404, {"error": str(e)}
+
+
+@router.post(
+    '/{park_id}/history/{event_id}/rollback/',
+    response={200: RollbackResponseSchema, 400: ErrorSchema, 403: ErrorSchema},
+    summary="Rollback park to historical state",
+    description="Rollback park to a historical state (Moderators/Admins only)"
+)
+def rollback_park(request, park_id: UUID, event_id: int, payload: RollbackRequestSchema):
+    """
+    Rollback park to a historical state.
+    
+    **Permission:** Moderators, Admins, Superusers only
+    """
+    # Check authentication
+    if not request.user or not request.user.is_authenticated:
+        return 401, {"error": "Authentication required"}
+    
+    # Check rollback permission
+    if not HistoryService.can_rollback(request.user):
+        return 403, {"error": "Only moderators and administrators can perform rollbacks"}
+    
+    park = get_object_or_404(Park, id=park_id)
+    
+    try:
+        result = HistoryService.rollback_to_event(
+            park, 'park', event_id, request.user,
+            fields=payload.fields,
+            comment=payload.comment,
+            create_backup=payload.create_backup
+        )
+        return result
+    except (ValueError, PermissionError) as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{park_id}/history/field/{field_name}/',
+    response={200: FieldHistorySchema, 404: ErrorSchema},
+    summary="Get field-specific history",
+    description="Get history of changes to a specific park field"
+)
+def get_park_field_history(request, park_id: UUID, field_name: str):
+    """Get history of changes to a specific park field."""
+    park = get_object_or_404(Park, id=park_id)
+    
+    history = HistoryService.get_field_history(
+        'park', str(park_id), field_name, request.user
+    )
+    
+    return {
+        'entity_id': str(park_id),
+        'entity_type': 'park',
+        'entity_name': park.name,
+        'field': field_name,
+        'field_type': 'CharField',  # Could introspect this
+        **history
+    }
+
+
+@router.get(
+    '/{park_id}/history/summary/',
+    response={200: HistoryActivitySummarySchema, 404: ErrorSchema},
+    summary="Get park activity summary",
+    description="Get activity summary for a park"
+)
+def get_park_activity_summary(request, park_id: UUID):
+    """Get activity summary for a park."""
+    park = get_object_or_404(Park, id=park_id)
+    
+    summary = HistoryService.get_activity_summary(
+        'park', str(park_id), request.user
+    )
+    
+    return {
+        'entity_id': str(park_id),
+        'entity_type': 'park',
+        'entity_name': park.name,
+        **summary
+    }

django-backend/api/v1/endpoints/photos.py

@@ -0,0 +1,600 @@
+"""
+Photo management API endpoints.
+
+Provides endpoints for photo upload, management, moderation, and entity attachment.
+"""
+
+import logging
+from typing import List, Optional
+from uuid import UUID
+
+from django.contrib.contenttypes.models import ContentType
+from django.core.exceptions import ValidationError as DjangoValidationError
+from django.db.models import Q, Count, Sum
+from django.http import HttpRequest
+from ninja import Router, File, Form
+from ninja.files import UploadedFile
+from ninja.pagination import paginate
+
+from api.v1.schemas import (
+    PhotoOut,
+    PhotoListOut,
+    PhotoUpdate,
+    PhotoUploadResponse,
+    PhotoModerateRequest,
+    PhotoReorderRequest,
+    PhotoAttachRequest,
+    PhotoStatsOut,
+    MessageSchema,
+    ErrorSchema,
+)
+from apps.media.models import Photo
+from apps.media.services import PhotoService, CloudFlareError
+from apps.media.validators import validate_image
+from apps.users.permissions import jwt_auth, require_moderator, require_admin
+from apps.entities.models import Park, Ride, Company, RideModel
+
+logger = logging.getLogger(__name__)
+
+router = Router(tags=["Photos"])
+photo_service = PhotoService()
+
+
+# ============================================================================
+# Helper Functions
+# ============================================================================
+
+def serialize_photo(photo: Photo) -> dict:
+    """
+    Serialize a Photo instance to dict for API response.
+    
+    Args:
+        photo: Photo instance
+        
+    Returns:
+        Dict with photo data
+    """
+    # Get entity info if attached
+    entity_type = None
+    entity_id = None
+    entity_name = None
+    
+    if photo.content_type and photo.object_id:
+        entity = photo.content_object
+        entity_type = photo.content_type.model
+        entity_id = str(photo.object_id)
+        entity_name = getattr(entity, 'name', str(entity)) if entity else None
+    
+    # Generate variant URLs
+    cloudflare_service = photo_service.cloudflare
+    thumbnail_url = cloudflare_service.get_image_url(photo.cloudflare_image_id, 'thumbnail')
+    banner_url = cloudflare_service.get_image_url(photo.cloudflare_image_id, 'banner')
+    
+    return {
+        'id': photo.id,
+        'cloudflare_image_id': photo.cloudflare_image_id,
+        'cloudflare_url': photo.cloudflare_url,
+        'title': photo.title,
+        'description': photo.description,
+        'credit': photo.credit,
+        'photo_type': photo.photo_type,
+        'is_visible': photo.is_visible,
+        'uploaded_by_id': photo.uploaded_by_id,
+        'uploaded_by_email': photo.uploaded_by.email if photo.uploaded_by else None,
+        'moderation_status': photo.moderation_status,
+        'moderated_by_id': photo.moderated_by_id,
+        'moderated_by_email': photo.moderated_by.email if photo.moderated_by else None,
+        'moderated_at': photo.moderated_at,
+        'moderation_notes': photo.moderation_notes,
+        'entity_type': entity_type,
+        'entity_id': entity_id,
+        'entity_name': entity_name,
+        'width': photo.width,
+        'height': photo.height,
+        'file_size': photo.file_size,
+        'mime_type': photo.mime_type,
+        'display_order': photo.display_order,
+        'thumbnail_url': thumbnail_url,
+        'banner_url': banner_url,
+        'created': photo.created_at,
+        'modified': photo.modified_at,
+    }
+
+
+def get_entity_by_type(entity_type: str, entity_id: UUID):
+    """
+    Get entity instance by type and ID.
+    
+    Args:
+        entity_type: Entity type (park, ride, company, ridemodel)
+        entity_id: Entity UUID
+        
+    Returns:
+        Entity instance
+        
+    Raises:
+        ValueError: If entity type is invalid or not found
+    """
+    entity_map = {
+        'park': Park,
+        'ride': Ride,
+        'company': Company,
+        'ridemodel': RideModel,
+    }
+    
+    model = entity_map.get(entity_type.lower())
+    if not model:
+        raise ValueError(f"Invalid entity type: {entity_type}")
+    
+    try:
+        return model.objects.get(id=entity_id)
+    except model.DoesNotExist:
+        raise ValueError(f"{entity_type} with ID {entity_id} not found")
+
+
+# ============================================================================
+# Public Endpoints
+# ============================================================================
+
+@router.get("/photos", response=List[PhotoOut], auth=None)
+@paginate
+def list_photos(
+    request: HttpRequest,
+    status: Optional[str] = None,
+    photo_type: Optional[str] = None,
+    entity_type: Optional[str] = None,
+    entity_id: Optional[UUID] = None,
+):
+    """
+    List approved photos (public endpoint).
+    
+    Query Parameters:
+        - status: Filter by moderation status (defaults to 'approved')
+        - photo_type: Filter by photo type
+        - entity_type: Filter by entity type
+        - entity_id: Filter by entity ID
+    """
+    queryset = Photo.objects.select_related(
+        'uploaded_by', 'moderated_by', 'content_type'
+    )
+    
+    # Default to approved photos for public
+    if status:
+        queryset = queryset.filter(moderation_status=status)
+    else:
+        queryset = queryset.approved()
+    
+    if photo_type:
+        queryset = queryset.filter(photo_type=photo_type)
+    
+    if entity_type and entity_id:
+        try:
+            entity = get_entity_by_type(entity_type, entity_id)
+            content_type = ContentType.objects.get_for_model(entity)
+            queryset = queryset.filter(
+                content_type=content_type,
+                object_id=entity_id
+            )
+        except ValueError as e:
+            return []
+    
+    queryset = queryset.filter(is_visible=True).order_by('display_order', '-created_at')
+    
+    return queryset
+
+
+@router.get("/photos/{photo_id}", response=PhotoOut, auth=None)
+def get_photo(request: HttpRequest, photo_id: UUID):
+    """
+    Get photo details by ID (public endpoint).
+    
+    Only returns approved photos for non-authenticated users.
+    """
+    try:
+        photo = Photo.objects.select_related(
+            'uploaded_by', 'moderated_by', 'content_type'
+        ).get(id=photo_id)
+        
+        # Only show approved photos to public
+        if not request.auth and photo.moderation_status != 'approved':
+            return 404, {"detail": "Photo not found"}
+        
+        return serialize_photo(photo)
+    except Photo.DoesNotExist:
+        return 404, {"detail": "Photo not found"}
+
+
+@router.get("/{entity_type}/{entity_id}/photos", response=List[PhotoOut], auth=None)
+def get_entity_photos(
+    request: HttpRequest,
+    entity_type: str,
+    entity_id: UUID,
+    photo_type: Optional[str] = None,
+):
+    """
+    Get photos for a specific entity (public endpoint).
+    
+    Path Parameters:
+        - entity_type: Entity type (park, ride, company, ridemodel)
+        - entity_id: Entity UUID
+        
+    Query Parameters:
+        - photo_type: Filter by photo type
+    """
+    try:
+        entity = get_entity_by_type(entity_type, entity_id)
+        photos = photo_service.get_entity_photos(
+            entity,
+            photo_type=photo_type,
+            approved_only=not request.auth
+        )
+        return [serialize_photo(photo) for photo in photos]
+    except ValueError as e:
+        return 404, {"detail": str(e)}
+
+
+# ============================================================================
+# Authenticated Endpoints
+# ============================================================================
+
+@router.post("/photos/upload", response=PhotoUploadResponse, auth=jwt_auth)
+def upload_photo(
+    request: HttpRequest,
+    file: UploadedFile = File(...),
+    title: Optional[str] = Form(None),
+    description: Optional[str] = Form(None),
+    credit: Optional[str] = Form(None),
+    photo_type: str = Form('gallery'),
+    entity_type: Optional[str] = Form(None),
+    entity_id: Optional[str] = Form(None),
+):
+    """
+    Upload a new photo.
+    
+    Requires authentication. Photo enters moderation queue.
+    
+    Form Data:
+        - file: Image file (required)
+        - title: Photo title
+        - description: Photo description
+        - credit: Photo credit/attribution
+        - photo_type: Type of photo (main, gallery, banner, logo, thumbnail, other)
+        - entity_type: Entity type to attach to (optional)
+        - entity_id: Entity ID to attach to (optional)
+    """
+    user = request.auth
+    
+    try:
+        # Validate image
+        validate_image(file, photo_type)
+        
+        # Get entity if provided
+        entity = None
+        if entity_type and entity_id:
+            try:
+                entity = get_entity_by_type(entity_type, UUID(entity_id))
+            except (ValueError, TypeError) as e:
+                return 400, {"detail": f"Invalid entity: {str(e)}"}
+        
+        # Create photo
+        photo = photo_service.create_photo(
+            file=file,
+            user=user,
+            entity=entity,
+            photo_type=photo_type,
+            title=title or file.name,
+            description=description or '',
+            credit=credit or '',
+            is_visible=True,
+        )
+        
+        return {
+            'success': True,
+            'message': 'Photo uploaded successfully and pending moderation',
+            'photo': serialize_photo(photo),
+        }
+        
+    except DjangoValidationError as e:
+        return 400, {"detail": str(e)}
+    except CloudFlareError as e:
+        logger.error(f"CloudFlare upload failed: {str(e)}")
+        return 500, {"detail": "Failed to upload image"}
+    except Exception as e:
+        logger.error(f"Photo upload failed: {str(e)}")
+        return 500, {"detail": "An error occurred during upload"}
+
+
+@router.patch("/photos/{photo_id}", response=PhotoOut, auth=jwt_auth)
+def update_photo(
+    request: HttpRequest,
+    photo_id: UUID,
+    payload: PhotoUpdate,
+):
+    """
+    Update photo metadata.
+    
+    Users can only update their own photos.
+    Moderators can update any photo.
+    """
+    user = request.auth
+    
+    try:
+        photo = Photo.objects.get(id=photo_id)
+        
+        # Check permissions
+        if photo.uploaded_by_id != user.id and not user.is_moderator:
+            return 403, {"detail": "Permission denied"}
+        
+        # Update fields
+        update_fields = []
+        if payload.title is not None:
+            photo.title = payload.title
+            update_fields.append('title')
+        if payload.description is not None:
+            photo.description = payload.description
+            update_fields.append('description')
+        if payload.credit is not None:
+            photo.credit = payload.credit
+            update_fields.append('credit')
+        if payload.photo_type is not None:
+            photo.photo_type = payload.photo_type
+            update_fields.append('photo_type')
+        if payload.is_visible is not None:
+            photo.is_visible = payload.is_visible
+            update_fields.append('is_visible')
+        if payload.display_order is not None:
+            photo.display_order = payload.display_order
+            update_fields.append('display_order')
+        
+        if update_fields:
+            photo.save(update_fields=update_fields)
+            logger.info(f"Photo {photo_id} updated by user {user.id}")
+        
+        return serialize_photo(photo)
+        
+    except Photo.DoesNotExist:
+        return 404, {"detail": "Photo not found"}
+
+
+@router.delete("/photos/{photo_id}", response=MessageSchema, auth=jwt_auth)
+def delete_photo(request: HttpRequest, photo_id: UUID):
+    """
+    Delete own photo.
+    
+    Users can only delete their own photos.
+    Photos are soft-deleted and removed from CloudFlare.
+    """
+    user = request.auth
+    
+    try:
+        photo = Photo.objects.get(id=photo_id)
+        
+        # Check permissions
+        if photo.uploaded_by_id != user.id and not user.is_moderator:
+            return 403, {"detail": "Permission denied"}
+        
+        photo_service.delete_photo(photo)
+        
+        return {
+            'success': True,
+            'message': 'Photo deleted successfully',
+        }
+        
+    except Photo.DoesNotExist:
+        return 404, {"detail": "Photo not found"}
+
+
+@router.post("/{entity_type}/{entity_id}/photos", response=MessageSchema, auth=jwt_auth)
+def attach_photo_to_entity(
+    request: HttpRequest,
+    entity_type: str,
+    entity_id: UUID,
+    payload: PhotoAttachRequest,
+):
+    """
+    Attach an existing photo to an entity.
+    
+    Requires authentication.
+    """
+    user = request.auth
+    
+    try:
+        # Get entity
+        entity = get_entity_by_type(entity_type, entity_id)
+        
+        # Get photo
+        photo = Photo.objects.get(id=payload.photo_id)
+        
+        # Check permissions (can only attach own photos unless moderator)
+        if photo.uploaded_by_id != user.id and not user.is_moderator:
+            return 403, {"detail": "Permission denied"}
+        
+        # Attach photo
+        photo_service.attach_to_entity(photo, entity)
+        
+        # Update photo type if provided
+        if payload.photo_type:
+            photo.photo_type = payload.photo_type
+            photo.save(update_fields=['photo_type'])
+        
+        return {
+            'success': True,
+            'message': f'Photo attached to {entity_type} successfully',
+        }
+        
+    except ValueError as e:
+        return 400, {"detail": str(e)}
+    except Photo.DoesNotExist:
+        return 404, {"detail": "Photo not found"}
+
+
+# ============================================================================
+# Moderator Endpoints
+# ============================================================================
+
+@router.get("/photos/pending", response=List[PhotoOut], auth=require_moderator)
+@paginate
+def list_pending_photos(request: HttpRequest):
+    """
+    List photos pending moderation (moderators only).
+    """
+    queryset = Photo.objects.select_related(
+        'uploaded_by', 'moderated_by', 'content_type'
+    ).pending().order_by('-created_at')
+    
+    return queryset
+
+
+@router.post("/photos/{photo_id}/approve", response=PhotoOut, auth=require_moderator)
+def approve_photo(request: HttpRequest, photo_id: UUID):
+    """
+    Approve a photo (moderators only).
+    """
+    user = request.auth
+    
+    try:
+        photo = Photo.objects.get(id=photo_id)
+        photo = photo_service.moderate_photo(
+            photo=photo,
+            status='approved',
+            moderator=user,
+        )
+        
+        return serialize_photo(photo)
+        
+    except Photo.DoesNotExist:
+        return 404, {"detail": "Photo not found"}
+
+
+@router.post("/photos/{photo_id}/reject", response=PhotoOut, auth=require_moderator)
+def reject_photo(
+    request: HttpRequest,
+    photo_id: UUID,
+    payload: PhotoModerateRequest,
+):
+    """
+    Reject a photo (moderators only).
+    """
+    user = request.auth
+    
+    try:
+        photo = Photo.objects.get(id=photo_id)
+        photo = photo_service.moderate_photo(
+            photo=photo,
+            status='rejected',
+            moderator=user,
+            notes=payload.notes or '',
+        )
+        
+        return serialize_photo(photo)
+        
+    except Photo.DoesNotExist:
+        return 404, {"detail": "Photo not found"}
+
+
+@router.post("/photos/{photo_id}/flag", response=PhotoOut, auth=require_moderator)
+def flag_photo(
+    request: HttpRequest,
+    photo_id: UUID,
+    payload: PhotoModerateRequest,
+):
+    """
+    Flag a photo for review (moderators only).
+    """
+    user = request.auth
+    
+    try:
+        photo = Photo.objects.get(id=photo_id)
+        photo = photo_service.moderate_photo(
+            photo=photo,
+            status='flagged',
+            moderator=user,
+            notes=payload.notes or '',
+        )
+        
+        return serialize_photo(photo)
+        
+    except Photo.DoesNotExist:
+        return 404, {"detail": "Photo not found"}
+
+
+@router.get("/photos/stats", response=PhotoStatsOut, auth=require_moderator)
+def get_photo_stats(request: HttpRequest):
+    """
+    Get photo statistics (moderators only).
+    """
+    stats = Photo.objects.aggregate(
+        total=Count('id'),
+        pending=Count('id', filter=Q(moderation_status='pending')),
+        approved=Count('id', filter=Q(moderation_status='approved')),
+        rejected=Count('id', filter=Q(moderation_status='rejected')),
+        flagged=Count('id', filter=Q(moderation_status='flagged')),
+        total_size=Sum('file_size'),
+    )
+    
+    return {
+        'total_photos': stats['total'] or 0,
+        'pending_photos': stats['pending'] or 0,
+        'approved_photos': stats['approved'] or 0,
+        'rejected_photos': stats['rejected'] or 0,
+        'flagged_photos': stats['flagged'] or 0,
+        'total_size_mb': round((stats['total_size'] or 0) / (1024 * 1024), 2),
+    }
+
+
+# ============================================================================
+# Admin Endpoints
+# ============================================================================
+
+@router.delete("/photos/{photo_id}/admin", response=MessageSchema, auth=require_admin)
+def admin_delete_photo(request: HttpRequest, photo_id: UUID):
+    """
+    Force delete any photo (admins only).
+    
+    Permanently removes photo from database and CloudFlare.
+    """
+    try:
+        photo = Photo.objects.get(id=photo_id)
+        photo_service.delete_photo(photo, delete_from_cloudflare=True)
+        
+        logger.info(f"Photo {photo_id} force deleted by admin {request.auth.id}")
+        
+        return {
+            'success': True,
+            'message': 'Photo permanently deleted',
+        }
+        
+    except Photo.DoesNotExist:
+        return 404, {"detail": "Photo not found"}
+
+
+@router.post(
+    "/{entity_type}/{entity_id}/photos/reorder",
+    response=MessageSchema,
+    auth=require_admin
+)
+def reorder_entity_photos(
+    request: HttpRequest,
+    entity_type: str,
+    entity_id: UUID,
+    payload: PhotoReorderRequest,
+):
+    """
+    Reorder photos for an entity (admins only).
+    """
+    try:
+        entity = get_entity_by_type(entity_type, entity_id)
+        
+        photo_service.reorder_photos(
+            entity=entity,
+            photo_ids=payload.photo_ids,
+            photo_type=payload.photo_type,
+        )
+        
+        return {
+            'success': True,
+            'message': 'Photos reordered successfully',
+        }
+        
+    except ValueError as e:
+        return 400, {"detail": str(e)}

django-backend/api/v1/endpoints/reports.py

@@ -0,0 +1,263 @@
+"""
+Reports API endpoints.
+
+Handles user-submitted reports for content moderation.
+"""
+from typing import List
+from uuid import UUID
+from datetime import datetime
+from ninja import Router, Query
+from django.shortcuts import get_object_or_404
+from django.db.models import Count, Avg, Q
+from django.db.models.functions import Extract
+from django.utils import timezone
+
+from apps.reports.models import Report
+from apps.users.permissions import require_role
+from api.v1.schemas import (
+    ReportOut,
+    ReportCreate,
+    ReportUpdate,
+    ReportListOut,
+    ReportStatsOut,
+    MessageSchema,
+    ErrorResponse,
+)
+
+
+router = Router(tags=["Reports"])
+
+
+def serialize_report(report: Report) -> dict:
+    """Serialize a report to dict for output."""
+    return {
+        'id': report.id,
+        'entity_type': report.entity_type,
+        'entity_id': report.entity_id,
+        'report_type': report.report_type,
+        'description': report.description,
+        'status': report.status,
+        'reported_by_id': report.reported_by_id,
+        'reported_by_email': report.reported_by.email if report.reported_by else None,
+        'reviewed_by_id': report.reviewed_by_id,
+        'reviewed_by_email': report.reviewed_by.email if report.reviewed_by else None,
+        'reviewed_at': report.reviewed_at,
+        'resolution_notes': report.resolution_notes,
+        'created_at': report.created_at,
+        'updated_at': report.updated_at,
+    }
+
+
+@router.post("/", response={201: ReportOut, 400: ErrorResponse, 401: ErrorResponse})
+def create_report(request, data: ReportCreate):
+    """
+    Submit a report (authenticated users only).
+    
+    Allows authenticated users to report inappropriate or inaccurate content.
+    """
+    # Require authentication
+    if not request.user or not request.user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    # Create report
+    report = Report.objects.create(
+        entity_type=data.entity_type,
+        entity_id=data.entity_id,
+        report_type=data.report_type,
+        description=data.description,
+        reported_by=request.user,
+        status='pending'
+    )
+    
+    return 201, serialize_report(report)
+
+
+@router.get("/", response={200: ReportListOut, 401: ErrorResponse})
+def list_reports(
+    request,
+    status: str = Query(None, description="Filter by status"),
+    report_type: str = Query(None, description="Filter by report type"),
+    entity_type: str = Query(None, description="Filter by entity type"),
+    entity_id: UUID = Query(None, description="Filter by entity ID"),
+    page: int = Query(1, ge=1),
+    page_size: int = Query(50, ge=1, le=100),
+):
+    """
+    List reports.
+    
+    Moderators see all reports. Regular users only see their own reports.
+    """
+    # Require authentication
+    if not request.user or not request.user.is_authenticated:
+        return 401, {'detail': 'Authentication required'}
+    
+    # Build queryset
+    queryset = Report.objects.all().select_related('reported_by', 'reviewed_by')
+    
+    # Filter by user unless moderator
+    is_moderator = hasattr(request.user, 'role') and request.user.role in ['moderator', 'admin']
+    if not is_moderator:
+        queryset = queryset.filter(reported_by=request.user)
+    
+    # Apply filters
+    if status:
+        queryset = queryset.filter(status=status)
+    if report_type:
+        queryset = queryset.filter(report_type=report_type)
+    if entity_type:
+        queryset = queryset.filter(entity_type=entity_type)
+    if entity_id:
+        queryset = queryset.filter(entity_id=entity_id)
+    
+    # Order by date (newest first)
+    queryset = queryset.order_by('-created_at')
+    
+    # Pagination
+    total = queryset.count()
+    total_pages = (total + page_size - 1) // page_size
+    start = (page - 1) * page_size
+    end = start + page_size
+    reports = queryset[start:end]
+    
+    return 200, {
+        'items': [serialize_report(report) for report in reports],
+        'total': total,
+        'page': page,
+        'page_size': page_size,
+        'total_pages': total_pages,
+    }
+
+
+@router.get("/{report_id}/", response={200: ReportOut, 404: ErrorResponse, 403: ErrorResponse})
+def get_report(request, report_id: UUID):
+    """
+    Get a single report by ID.
+    
+    Users can only view their own reports unless they are moderators.
+    """
+    report = get_object_or_404(
+        Report.objects.select_related('reported_by', 'reviewed_by'),
+        id=report_id
+    )
+    
+    # Permission check: must be reporter or moderator
+    is_moderator = hasattr(request.user, 'role') and request.user.role in ['moderator', 'admin']
+    if not is_moderator and report.reported_by != request.user:
+        return 403, {'detail': 'You do not have permission to view this report'}
+    
+    return 200, serialize_report(report)
+
+
+@router.patch("/{report_id}/", response={200: ReportOut, 404: ErrorResponse, 403: ErrorResponse})
+@require_role(['moderator', 'admin'])
+def update_report(request, report_id: UUID, data: ReportUpdate):
+    """
+    Update a report (moderators only).
+    
+    Allows moderators to update report status and add resolution notes.
+    """
+    report = get_object_or_404(Report, id=report_id)
+    
+    # Update fields if provided
+    update_fields = []
+    
+    if data.status is not None:
+        report.status = data.status
+        update_fields.append('status')
+        
+        # If status is being changed to resolved/dismissed, set reviewed fields
+        if data.status in ['resolved', 'dismissed'] and not report.reviewed_by:
+            report.reviewed_by = request.user
+            report.reviewed_at = timezone.now()
+            update_fields.extend(['reviewed_by', 'reviewed_at'])
+    
+    if data.resolution_notes is not None:
+        report.resolution_notes = data.resolution_notes
+        update_fields.append('resolution_notes')
+    
+    if update_fields:
+        update_fields.append('updated_at')
+        report.save(update_fields=update_fields)
+    
+    return 200, serialize_report(report)
+
+
+@router.get("/stats/", response={200: ReportStatsOut, 403: ErrorResponse})
+@require_role(['moderator', 'admin'])
+def get_report_stats(request):
+    """
+    Get report statistics (moderators only).
+    
+    Returns various statistics about reports for moderation purposes.
+    """
+    queryset = Report.objects.all()
+    
+    # Count by status
+    total_reports = queryset.count()
+    pending_reports = queryset.filter(status='pending').count()
+    reviewing_reports = queryset.filter(status='reviewing').count()
+    resolved_reports = queryset.filter(status='resolved').count()
+    dismissed_reports = queryset.filter(status='dismissed').count()
+    
+    # Count by report type
+    reports_by_type = dict(
+        queryset.values('report_type')
+        .annotate(count=Count('id'))
+        .values_list('report_type', 'count')
+    )
+    
+    # Count by entity type
+    reports_by_entity_type = dict(
+        queryset.values('entity_type')
+        .annotate(count=Count('id'))
+        .values_list('entity_type', 'count')
+    )
+    
+    # Calculate average resolution time for resolved/dismissed reports
+    resolved_queryset = queryset.filter(
+        status__in=['resolved', 'dismissed'],
+        reviewed_at__isnull=False
+    )
+    
+    avg_resolution_time = None
+    if resolved_queryset.exists():
+        # Calculate time difference in hours
+        from django.db.models import F, ExpressionWrapper, DurationField
+        from datetime import timedelta
+        
+        time_diffs = []
+        for report in resolved_queryset:
+            if report.reviewed_at and report.created_at:
+                diff = (report.reviewed_at - report.created_at).total_seconds() / 3600
+                time_diffs.append(diff)
+        
+        if time_diffs:
+            avg_resolution_time = sum(time_diffs) / len(time_diffs)
+    
+    return 200, {
+        'total_reports': total_reports,
+        'pending_reports': pending_reports,
+        'reviewing_reports': reviewing_reports,
+        'resolved_reports': resolved_reports,
+        'dismissed_reports': dismissed_reports,
+        'reports_by_type': reports_by_type,
+        'reports_by_entity_type': reports_by_entity_type,
+        'average_resolution_time_hours': avg_resolution_time,
+    }
+
+
+@router.delete("/{report_id}/", response={200: MessageSchema, 404: ErrorResponse, 403: ErrorResponse})
+@require_role(['moderator', 'admin'])
+def delete_report(request, report_id: UUID):
+    """
+    Delete a report (moderators only).
+    
+    Permanently removes a report from the system.
+    """
+    report = get_object_or_404(Report, id=report_id)
+    report.delete()
+    
+    return 200, {
+        'message': 'Report deleted successfully',
+        'success': True
+    }

django-backend/api/v1/endpoints/reviews.py

@@ -0,0 +1,844 @@
+"""
+Review endpoints for API v1.
+
+Provides CRUD operations for reviews with moderation workflow integration.
+Users can review parks and rides, vote on reviews, and moderators can approve/reject.
+"""
+from typing import List, Optional
+from uuid import UUID
+from django.shortcuts import get_object_or_404
+from django.db.models import Q, Count, Avg
+from django.contrib.contenttypes.models import ContentType
+from django.core.exceptions import ValidationError
+from ninja import Router, Query
+from ninja.pagination import paginate, PageNumberPagination
+import logging
+
+from apps.reviews.models import Review, ReviewHelpfulVote
+from apps.reviews.services import ReviewSubmissionService
+from apps.entities.models import Park, Ride
+from apps.users.permissions import jwt_auth, require_auth
+from ..schemas import (
+    ReviewCreateSchema,
+    ReviewUpdateSchema,
+    ReviewOut,
+    ReviewListOut,
+    ReviewStatsOut,
+    VoteRequest,
+    VoteResponse,
+    ErrorResponse,
+    UserSchema,
+    HistoryListResponse,
+    HistoryEventDetailSchema,
+    HistoryComparisonSchema,
+    HistoryDiffCurrentSchema,
+    FieldHistorySchema,
+    HistoryActivitySummarySchema,
+    RollbackRequestSchema,
+    RollbackResponseSchema,
+    ErrorSchema,
+)
+from ..services.history_service import HistoryService
+
+router = Router(tags=["Reviews"])
+logger = logging.getLogger(__name__)
+
+
+class ReviewPagination(PageNumberPagination):
+    """Custom pagination for reviews."""
+    page_size = 50
+
+
+def _get_entity(entity_type: str, entity_id: UUID):
+    """Helper to get and validate entity (Park or Ride)."""
+    if entity_type == 'park':
+        return get_object_or_404(Park, id=entity_id), ContentType.objects.get_for_model(Park)
+    elif entity_type == 'ride':
+        return get_object_or_404(Ride, id=entity_id), ContentType.objects.get_for_model(Ride)
+    else:
+        raise ValidationError(f"Invalid entity_type: {entity_type}")
+
+
+def _serialize_review(review: Review, user=None) -> dict:
+    """Serialize review with computed fields."""
+    data = {
+        'id': review.id,
+        'user': UserSchema(
+            id=review.user.id,
+            username=review.user.username,
+            display_name=review.user.display_name,
+            avatar_url=review.user.avatar_url,
+            reputation_score=review.user.reputation_score,
+        ),
+        'entity_type': review.content_type.model,
+        'entity_id': str(review.object_id),
+        'entity_name': str(review.content_object) if review.content_object else 'Unknown',
+        'title': review.title,
+        'content': review.content,
+        'rating': review.rating,
+        'visit_date': review.visit_date,
+        'wait_time_minutes': review.wait_time_minutes,
+        'helpful_votes': review.helpful_votes,
+        'total_votes': review.total_votes,
+        'helpful_percentage': review.helpful_percentage,
+        'moderation_status': review.moderation_status,
+        'moderated_at': review.moderated_at,
+        'moderated_by_email': review.moderated_by.email if review.moderated_by else None,
+        'photo_count': review.photos.count(),
+        'created': review.created,
+        'modified': review.modified,
+        'user_vote': None,
+    }
+    
+    # Add user's vote if authenticated
+    if user and user.is_authenticated:
+        try:
+            vote = ReviewHelpfulVote.objects.get(review=review, user=user)
+            data['user_vote'] = vote.is_helpful
+        except ReviewHelpfulVote.DoesNotExist:
+            pass
+    
+    return data
+
+
+# ============================================================================
+# Main Review CRUD Endpoints
+# ============================================================================
+
+@router.post("/", response={201: ReviewOut, 400: ErrorResponse, 409: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def create_review(request, data: ReviewCreateSchema):
+    """
+    Create a new review for a park or ride through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - entity_type: "park" or "ride"
+    - entity_id: UUID of park or ride
+    - title: Review title
+    - content: Review content (min 10 characters)
+    - rating: 1-5 stars
+    - visit_date: Optional visit date
+    - wait_time_minutes: Optional wait time
+    
+    **Returns:** Created review or submission confirmation
+    
+    **Flow:**
+    - Moderators: Review created immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All reviews flow through ContentSubmission pipeline.
+    Users can only create one review per entity.
+    """
+    try:
+        user = request.auth
+        
+        # Get and validate entity
+        entity, content_type = _get_entity(data.entity_type, data.entity_id)
+        
+        # Create review through Sacred Pipeline
+        submission, review = ReviewSubmissionService.create_review_submission(
+            user=user,
+            entity=entity,
+            rating=data.rating,
+            title=data.title,
+            content=data.content,
+            visit_date=data.visit_date,
+            wait_time_minutes=data.wait_time_minutes,
+            source='api'
+        )
+        
+        # If moderator bypass happened, Review was created immediately
+        if review:
+            logger.info(f"Review created (moderator): {review.id} by {user.email}")
+            review_data = _serialize_review(review, user)
+            return 201, review_data
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Review submission created: {submission.id} by {user.email}")
+        return 201, {
+            'submission_id': str(submission.id),
+            'status': 'pending_moderation',
+            'message': 'Review submitted for moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error creating review: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.get("/", response={200: List[ReviewOut]})
+@paginate(ReviewPagination)
+def list_reviews(
+    request,
+    entity_type: Optional[str] = Query(None, description="Filter by entity type: park or ride"),
+    entity_id: Optional[UUID] = Query(None, description="Filter by specific entity ID"),
+    user_id: Optional[UUID] = Query(None, description="Filter by user ID"),
+    rating: Optional[int] = Query(None, ge=1, le=5, description="Filter by rating"),
+    moderation_status: Optional[str] = Query(None, description="Filter by moderation status"),
+    ordering: Optional[str] = Query("-created", description="Sort by field")
+):
+    """
+    List reviews with optional filtering.
+    
+    **Authentication:** Optional (only approved reviews shown if not authenticated/not moderator)
+    
+    **Filters:**
+    - entity_type: park or ride
+    - entity_id: Specific park/ride
+    - user_id: Reviews by specific user
+    - rating: Filter by star rating
+    - moderation_status: pending/approved/rejected (moderators only)
+    - ordering: Sort field (default: -created)
+    
+    **Returns:** Paginated list of reviews
+    """
+    # Base query with optimizations
+    queryset = Review.objects.select_related(
+        'user', 
+        'moderated_by',
+        'content_type'
+    ).prefetch_related('photos')
+    
+    # Check if user is authenticated and is moderator
+    user = request.auth if hasattr(request, 'auth') else None
+    is_moderator = user and hasattr(user, 'role') and user.role.is_moderator if user else False
+    
+    # Apply moderation filter
+    if not is_moderator:
+        queryset = queryset.filter(moderation_status=Review.MODERATION_APPROVED)
+    
+    # Apply entity type filter
+    if entity_type:
+        if entity_type == 'park':
+            ct = ContentType.objects.get_for_model(Park)
+        elif entity_type == 'ride':
+            ct = ContentType.objects.get_for_model(Ride)
+        else:
+            queryset = queryset.none()
+        queryset = queryset.filter(content_type=ct)
+    
+    # Apply entity ID filter
+    if entity_id:
+        queryset = queryset.filter(object_id=entity_id)
+    
+    # Apply user filter
+    if user_id:
+        queryset = queryset.filter(user_id=user_id)
+    
+    # Apply rating filter
+    if rating:
+        queryset = queryset.filter(rating=rating)
+    
+    # Apply moderation status filter (moderators only)
+    if moderation_status and is_moderator:
+        queryset = queryset.filter(moderation_status=moderation_status)
+    
+    # Apply ordering
+    valid_order_fields = ['created', 'modified', 'rating', 'helpful_votes', 'visit_date']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    # Serialize reviews
+    reviews = [_serialize_review(review, user) for review in queryset]
+    return reviews
+
+
+@router.get("/{review_id}", response={200: ReviewOut, 404: ErrorResponse})
+def get_review(request, review_id: int):
+    """
+    Get a specific review by ID.
+    
+    **Authentication:** Optional
+    
+    **Parameters:**
+    - review_id: Review ID
+    
+    **Returns:** Review details
+    
+    **Note:** Only approved reviews are accessible to non-moderators.
+    """
+    user = request.auth if hasattr(request, 'auth') else None
+    is_moderator = user and hasattr(user, 'role') and user.role.is_moderator if user else False
+    is_owner = user and Review.objects.filter(id=review_id, user=user).exists() if user else False
+    
+    review = get_object_or_404(
+        Review.objects.select_related('user', 'moderated_by', 'content_type').prefetch_related('photos'),
+        id=review_id
+    )
+    
+    # Check access
+    if not review.is_approved and not is_moderator and not is_owner:
+        return 404, {'detail': 'Review not found'}
+    
+    review_data = _serialize_review(review, user)
+    return 200, review_data
+
+
+@router.put("/{review_id}", response={200: ReviewOut, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def update_review(request, review_id: int, data: ReviewUpdateSchema):
+    """
+    Update your own review.
+    
+    **Authentication:** Required (must be review owner)
+    
+    **Parameters:**
+    - review_id: Review ID
+    - data: Fields to update
+    
+    **Returns:** Updated review
+    
+    **Note:** Updating a review resets it to pending moderation.
+    """
+    user = request.auth
+    
+    review = get_object_or_404(
+        Review.objects.select_related('user', 'content_type'),
+        id=review_id
+    )
+    
+    # Check ownership
+    if review.user != user:
+        return 403, {'detail': 'You can only update your own reviews'}
+    
+    # Update fields
+    update_data = data.dict(exclude_unset=True)
+    for key, value in update_data.items():
+        setattr(review, key, value)
+    
+    # Reset to pending moderation
+    review.moderation_status = Review.MODERATION_PENDING
+    review.moderated_at = None
+    review.moderated_by = None
+    review.moderation_notes = ''
+    review.save()
+    
+    logger.info(f"Review updated: {review.id} by {user.email}")
+    
+    review_data = _serialize_review(review, user)
+    return 200, review_data
+
+
+@router.delete("/{review_id}", response={204: None, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def delete_review(request, review_id: int):
+    """
+    Delete your own review.
+    
+    **Authentication:** Required (must be review owner)
+    
+    **Parameters:**
+    - review_id: Review ID
+    
+    **Returns:** No content (204)
+    """
+    user = request.auth
+    
+    review = get_object_or_404(Review, id=review_id)
+    
+    # Check ownership
+    if review.user != user:
+        return 403, {'detail': 'You can only delete your own reviews'}
+    
+    logger.info(f"Review deleted: {review.id} by {user.email}")
+    review.delete()
+    
+    return 204, None
+
+
+# ============================================================================
+# Voting Endpoint
+# ============================================================================
+
+@router.post("/{review_id}/vote", response={200: VoteResponse, 400: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def vote_on_review(request, review_id: int, data: VoteRequest):
+    """
+    Vote on a review (helpful or not helpful).
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - review_id: Review ID
+    - is_helpful: True if helpful, False if not helpful
+    
+    **Returns:** Updated vote counts
+    
+    **Note:** Users can change their vote but cannot vote on their own reviews.
+    """
+    user = request.auth
+    
+    review = get_object_or_404(Review, id=review_id)
+    
+    # Prevent self-voting
+    if review.user == user:
+        return 400, {'detail': 'You cannot vote on your own review'}
+    
+    # Create or update vote
+    vote, created = ReviewHelpfulVote.objects.update_or_create(
+        review=review,
+        user=user,
+        defaults={'is_helpful': data.is_helpful}
+    )
+    
+    # Refresh review to get updated counts
+    review.refresh_from_db()
+    
+    return 200, {
+        'success': True,
+        'review_id': review.id,
+        'helpful_votes': review.helpful_votes,
+        'total_votes': review.total_votes,
+        'helpful_percentage': review.helpful_percentage,
+    }
+
+
+# ============================================================================
+# Entity-Specific Review Endpoints
+# ============================================================================
+
+@router.get("/parks/{park_id}", response={200: List[ReviewOut]})
+@paginate(ReviewPagination)
+def get_park_reviews(
+    request,
+    park_id: UUID,
+    rating: Optional[int] = Query(None, ge=1, le=5),
+    ordering: Optional[str] = Query("-created")
+):
+    """
+    Get all reviews for a specific park.
+    
+    **Parameters:**
+    - park_id: Park UUID
+    - rating: Optional rating filter
+    - ordering: Sort field (default: -created)
+    
+    **Returns:** Paginated list of park reviews
+    """
+    park = get_object_or_404(Park, id=park_id)
+    content_type = ContentType.objects.get_for_model(Park)
+    
+    user = request.auth if hasattr(request, 'auth') else None
+    is_moderator = user and hasattr(user, 'role') and user.role.is_moderator if user else False
+    
+    queryset = Review.objects.filter(
+        content_type=content_type,
+        object_id=park.id
+    ).select_related('user', 'moderated_by').prefetch_related('photos')
+    
+    if not is_moderator:
+        queryset = queryset.filter(moderation_status=Review.MODERATION_APPROVED)
+    
+    if rating:
+        queryset = queryset.filter(rating=rating)
+    
+    valid_order_fields = ['created', 'modified', 'rating', 'helpful_votes', 'visit_date']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    reviews = [_serialize_review(review, user) for review in queryset]
+    return reviews
+
+
+@router.get("/rides/{ride_id}", response={200: List[ReviewOut]})
+@paginate(ReviewPagination)
+def get_ride_reviews(
+    request,
+    ride_id: UUID,
+    rating: Optional[int] = Query(None, ge=1, le=5),
+    ordering: Optional[str] = Query("-created")
+):
+    """
+    Get all reviews for a specific ride.
+    
+    **Parameters:**
+    - ride_id: Ride UUID
+    - rating: Optional rating filter
+    - ordering: Sort field (default: -created)
+    
+    **Returns:** Paginated list of ride reviews
+    """
+    ride = get_object_or_404(Ride, id=ride_id)
+    content_type = ContentType.objects.get_for_model(Ride)
+    
+    user = request.auth if hasattr(request, 'auth') else None
+    is_moderator = user and hasattr(user, 'role') and user.role.is_moderator if user else False
+    
+    queryset = Review.objects.filter(
+        content_type=content_type,
+        object_id=ride.id
+    ).select_related('user', 'moderated_by').prefetch_related('photos')
+    
+    if not is_moderator:
+        queryset = queryset.filter(moderation_status=Review.MODERATION_APPROVED)
+    
+    if rating:
+        queryset = queryset.filter(rating=rating)
+    
+    valid_order_fields = ['created', 'modified', 'rating', 'helpful_votes', 'visit_date']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    reviews = [_serialize_review(review, user) for review in queryset]
+    return reviews
+
+
+@router.get("/users/{user_id}", response={200: List[ReviewOut]})
+@paginate(ReviewPagination)
+def get_user_reviews(
+    request,
+    user_id: UUID,
+    entity_type: Optional[str] = Query(None),
+    ordering: Optional[str] = Query("-created")
+):
+    """
+    Get all reviews by a specific user.
+    
+    **Parameters:**
+    - user_id: User UUID
+    - entity_type: Optional filter (park or ride)
+    - ordering: Sort field (default: -created)
+    
+    **Returns:** Paginated list of user's reviews
+    
+    **Note:** Only approved reviews visible unless viewing own reviews or moderator.
+    """
+    user = request.auth if hasattr(request, 'auth') else None
+    is_owner = user and str(user.id) == str(user_id) if user else False
+    is_moderator = user and hasattr(user, 'role') and user.role.is_moderator if user else False
+    
+    queryset = Review.objects.filter(
+        user_id=user_id
+    ).select_related('user', 'moderated_by', 'content_type').prefetch_related('photos')
+    
+    # Filter by moderation status
+    if not is_owner and not is_moderator:
+        queryset = queryset.filter(moderation_status=Review.MODERATION_APPROVED)
+    
+    # Apply entity type filter
+    if entity_type:
+        if entity_type == 'park':
+            ct = ContentType.objects.get_for_model(Park)
+        elif entity_type == 'ride':
+            ct = ContentType.objects.get_for_model(Ride)
+        else:
+            queryset = queryset.none()
+        queryset = queryset.filter(content_type=ct)
+    
+    # Apply ordering
+    valid_order_fields = ['created', 'modified', 'rating', 'helpful_votes', 'visit_date']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    reviews = [_serialize_review(review, user) for review in queryset]
+    return reviews
+
+
+# ============================================================================
+# Statistics Endpoint
+# ============================================================================
+
+@router.get("/stats/{entity_type}/{entity_id}", response={200: ReviewStatsOut, 404: ErrorResponse})
+def get_review_stats(request, entity_type: str, entity_id: UUID):
+    """
+    Get review statistics for a park or ride.
+    
+    **Parameters:**
+    - entity_type: "park" or "ride"
+    - entity_id: Entity UUID
+    
+    **Returns:** Statistics including average rating and distribution
+    """
+    try:
+        entity, content_type = _get_entity(entity_type, entity_id)
+    except ValidationError as e:
+        return 404, {'detail': str(e)}
+    
+    # Get approved reviews only
+    reviews = Review.objects.filter(
+        content_type=content_type,
+        object_id=entity.id,
+        moderation_status=Review.MODERATION_APPROVED
+    )
+    
+    # Calculate stats
+    stats = reviews.aggregate(
+        average_rating=Avg('rating'),
+        total_reviews=Count('id')
+    )
+    
+    # Get rating distribution
+    distribution = {}
+    for rating in range(1, 6):
+        distribution[rating] = reviews.filter(rating=rating).count()
+    
+    return 200, {
+        'average_rating': stats['average_rating'] or 0.0,
+        'total_reviews': stats['total_reviews'] or 0,
+        'rating_distribution': distribution,
+    }
+
+
+# ============================================================================
+# History Endpoints
+# ============================================================================
+
+@router.get(
+    '/{review_id}/history/',
+    response={200: HistoryListResponse, 404: ErrorSchema},
+    summary="Get review history",
+    description="Get historical changes for a review"
+)
+def get_review_history(
+    request,
+    review_id: int,
+    page: int = Query(1, ge=1),
+    page_size: int = Query(50, ge=1, le=100),
+    date_from: Optional[str] = Query(None, description="Filter from date (YYYY-MM-DD)"),
+    date_to: Optional[str] = Query(None, description="Filter to date (YYYY-MM-DD)")
+):
+    """Get history for a review."""
+    from datetime import datetime
+    
+    # Verify review exists
+    review = get_object_or_404(Review, id=review_id)
+    
+    # Parse dates if provided
+    date_from_obj = datetime.fromisoformat(date_from).date() if date_from else None
+    date_to_obj = datetime.fromisoformat(date_to).date() if date_to else None
+    
+    # Get history
+    offset = (page - 1) * page_size
+    events, accessible_count = HistoryService.get_history(
+        'review', str(review_id), request.user,
+        date_from=date_from_obj, date_to=date_to_obj,
+        limit=page_size, offset=offset
+    )
+    
+    # Format events
+    formatted_events = []
+    for event in events:
+        formatted_events.append({
+            'id': event['id'],
+            'timestamp': event['timestamp'],
+            'operation': event['operation'],
+            'snapshot': event['snapshot'],
+            'changed_fields': event.get('changed_fields'),
+            'change_summary': event.get('change_summary', ''),
+            'can_rollback': HistoryService.can_rollback(request.user)
+        })
+    
+    # Calculate pagination
+    total_pages = (accessible_count + page_size - 1) // page_size
+    
+    return {
+        'entity_id': str(review_id),
+        'entity_type': 'review',
+        'entity_name': f"Review by {review.user.username}",
+        'total_events': accessible_count,
+        'accessible_events': accessible_count,
+        'access_limited': HistoryService.is_access_limited(request.user),
+        'access_reason': HistoryService.get_access_reason(request.user),
+        'events': formatted_events,
+        'pagination': {
+            'page': page,
+            'page_size': page_size,
+            'total_pages': total_pages,
+            'total_items': accessible_count
+        }
+    }
+
+
+@router.get(
+    '/{review_id}/history/{event_id}/',
+    response={200: HistoryEventDetailSchema, 404: ErrorSchema},
+    summary="Get specific review history event",
+    description="Get detailed information about a specific historical event"
+)
+def get_review_history_event(request, review_id: int, event_id: int):
+    """Get a specific history event for a review."""
+    review = get_object_or_404(Review, id=review_id)
+    event = HistoryService.get_event('review', event_id, request.user)
+    
+    if not event:
+        return 404, {"error": "Event not found or not accessible"}
+    
+    return {
+        'id': event['id'],
+        'timestamp': event['timestamp'],
+        'operation': event['operation'],
+        'entity_id': str(review_id),
+        'entity_type': 'review',
+        'entity_name': f"Review by {review.user.username}",
+        'snapshot': event['snapshot'],
+        'changed_fields': event.get('changed_fields'),
+        'metadata': event.get('metadata', {}),
+        'can_rollback': HistoryService.can_rollback(request.user),
+        'rollback_preview': None
+    }
+
+
+@router.get(
+    '/{review_id}/history/compare/',
+    response={200: HistoryComparisonSchema, 400: ErrorSchema, 404: ErrorSchema},
+    summary="Compare two review history events",
+    description="Compare two historical events for a review"
+)
+def compare_review_history(
+    request,
+    review_id: int,
+    event1: int = Query(..., description="First event ID"),
+    event2: int = Query(..., description="Second event ID")
+):
+    """Compare two historical events for a review."""
+    review = get_object_or_404(Review, id=review_id)
+    
+    try:
+        comparison = HistoryService.compare_events(
+            'review', event1, event2, request.user
+        )
+        
+        if not comparison:
+            return 404, {"error": "One or both events not found"}
+        
+        return {
+            'entity_id': str(review_id),
+            'entity_type': 'review',
+            'entity_name': f"Review by {review.user.username}",
+            'event1': comparison['event1'],
+            'event2': comparison['event2'],
+            'differences': comparison['differences'],
+            'changed_field_count': comparison['changed_field_count'],
+            'unchanged_field_count': comparison['unchanged_field_count'],
+            'time_between': comparison['time_between']
+        }
+    except ValueError as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{review_id}/history/{event_id}/diff-current/',
+    response={200: HistoryDiffCurrentSchema, 404: ErrorSchema},
+    summary="Compare historical event with current state",
+    description="Compare a historical event with the current review state"
+)
+def diff_review_history_with_current(request, review_id: int, event_id: int):
+    """Compare historical event with current review state."""
+    review = get_object_or_404(Review, id=review_id)
+    
+    try:
+        diff = HistoryService.compare_with_current(
+            'review', event_id, review, request.user
+        )
+        
+        if not diff:
+            return 404, {"error": "Event not found"}
+        
+        return {
+            'entity_id': str(review_id),
+            'entity_type': 'review',
+            'entity_name': f"Review by {review.user.username}",
+            'event': diff['event'],
+            'current_state': diff['current_state'],
+            'differences': diff['differences'],
+            'changed_field_count': diff['changed_field_count'],
+            'time_since': diff['time_since']
+        }
+    except ValueError as e:
+        return 404, {"error": str(e)}
+
+
+@router.post(
+    '/{review_id}/history/{event_id}/rollback/',
+    response={200: RollbackResponseSchema, 400: ErrorSchema, 403: ErrorSchema},
+    summary="Rollback review to historical state",
+    description="Rollback review to a historical state (Moderators/Admins only)"
+)
+def rollback_review(request, review_id: int, event_id: int, payload: RollbackRequestSchema):
+    """
+    Rollback review to a historical state.
+    
+    **Permission:** Moderators, Admins, Superusers only
+    """
+    # Check authentication
+    if not request.user or not request.user.is_authenticated:
+        return 401, {"error": "Authentication required"}
+    
+    # Check rollback permission
+    if not HistoryService.can_rollback(request.user):
+        return 403, {"error": "Only moderators and administrators can perform rollbacks"}
+    
+    review = get_object_or_404(Review, id=review_id)
+    
+    try:
+        result = HistoryService.rollback_to_event(
+            review, 'review', event_id, request.user,
+            fields=payload.fields,
+            comment=payload.comment,
+            create_backup=payload.create_backup
+        )
+        return result
+    except (ValueError, PermissionError) as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{review_id}/history/field/{field_name}/',
+    response={200: FieldHistorySchema, 404: ErrorSchema},
+    summary="Get field-specific history",
+    description="Get history of changes to a specific review field"
+)
+def get_review_field_history(request, review_id: int, field_name: str):
+    """Get history of changes to a specific review field."""
+    review = get_object_or_404(Review, id=review_id)
+    
+    history = HistoryService.get_field_history(
+        'review', str(review_id), field_name, request.user
+    )
+    
+    return {
+        'entity_id': str(review_id),
+        'entity_type': 'review',
+        'entity_name': f"Review by {review.user.username}",
+        'field': field_name,
+        'field_type': 'CharField',  # Could introspect this
+        **history
+    }
+
+
+@router.get(
+    '/{review_id}/history/summary/',
+    response={200: HistoryActivitySummarySchema, 404: ErrorSchema},
+    summary="Get review activity summary",
+    description="Get activity summary for a review"
+)
+def get_review_activity_summary(request, review_id: int):
+    """Get activity summary for a review."""
+    review = get_object_or_404(Review, id=review_id)
+    
+    summary = HistoryService.get_activity_summary(
+        'review', str(review_id), request.user
+    )
+    
+    return {
+        'entity_id': str(review_id),
+        'entity_type': 'review',
+        'entity_name': f"Review by {review.user.username}",
+        **summary
+    }

django-backend/api/v1/endpoints/ride_credits.py

@@ -0,0 +1,410 @@
+"""
+Ride Credit endpoints for API v1.
+
+Provides CRUD operations for tracking which rides users have ridden (coaster counting).
+Users can log rides, track ride counts, and view statistics.
+"""
+from typing import List, Optional
+from uuid import UUID
+from datetime import date
+from django.shortcuts import get_object_or_404
+from django.db.models import Count, Sum, Min, Max, Q
+from ninja import Router, Query
+from ninja.pagination import paginate, PageNumberPagination
+import logging
+
+from apps.users.models import UserRideCredit, User
+from apps.entities.models import Ride
+from apps.users.permissions import jwt_auth, require_auth
+from ..schemas import (
+    RideCreditCreateSchema,
+    RideCreditUpdateSchema,
+    RideCreditOut,
+    RideCreditListOut,
+    RideCreditStatsOut,
+    ErrorResponse,
+    UserSchema,
+)
+
+router = Router(tags=["Ride Credits"])
+logger = logging.getLogger(__name__)
+
+
+class RideCreditPagination(PageNumberPagination):
+    """Custom pagination for ride credits."""
+    page_size = 50
+
+
+def _serialize_ride_credit(credit: UserRideCredit) -> dict:
+    """Serialize ride credit with computed fields."""
+    ride = credit.ride
+    park = ride.park
+    
+    return {
+        'id': credit.id,
+        'user': UserSchema(
+            id=credit.user.id,
+            username=credit.user.username,
+            display_name=credit.user.display_name,
+            avatar_url=credit.user.avatar_url,
+            reputation_score=credit.user.reputation_score,
+        ),
+        'ride_id': str(ride.id),
+        'ride_name': ride.name,
+        'ride_slug': ride.slug,
+        'park_id': str(park.id),
+        'park_name': park.name,
+        'park_slug': park.slug,
+        'is_coaster': ride.is_coaster,
+        'first_ride_date': credit.first_ride_date,
+        'ride_count': credit.ride_count,
+        'notes': credit.notes or '',
+        'created': credit.created,
+        'modified': credit.modified,
+    }
+
+
+# ============================================================================
+# Main Ride Credit CRUD Endpoints
+# ============================================================================
+
+@router.post("/", response={201: RideCreditOut, 400: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def create_ride_credit(request, data: RideCreditCreateSchema):
+    """
+    Log a ride (create or update ride credit).
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - ride_id: UUID of ride
+    - first_ride_date: Date of first ride (optional)
+    - ride_count: Number of times ridden (default: 1)
+    - notes: Notes about the ride experience (optional)
+    
+    **Returns:** Created or updated ride credit
+    
+    **Note:** If a credit already exists, it updates the ride_count.
+    """
+    try:
+        user = request.auth
+        
+        # Validate ride exists
+        ride = get_object_or_404(Ride, id=data.ride_id)
+        
+        # Check if credit already exists
+        credit, created = UserRideCredit.objects.get_or_create(
+            user=user,
+            ride=ride,
+            defaults={
+                'first_ride_date': data.first_ride_date,
+                'ride_count': data.ride_count,
+                'notes': data.notes or '',
+            }
+        )
+        
+        if not created:
+            # Update existing credit
+            credit.ride_count += data.ride_count
+            if data.first_ride_date and (not credit.first_ride_date or data.first_ride_date < credit.first_ride_date):
+                credit.first_ride_date = data.first_ride_date
+            if data.notes:
+                credit.notes = data.notes
+            credit.save()
+        
+        logger.info(f"Ride credit {'created' if created else 'updated'}: {credit.id} by {user.email}")
+        
+        credit_data = _serialize_ride_credit(credit)
+        return 201, credit_data
+        
+    except Exception as e:
+        logger.error(f"Error creating ride credit: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.get("/", response={200: List[RideCreditOut]}, auth=jwt_auth)
+@require_auth
+@paginate(RideCreditPagination)
+def list_my_ride_credits(
+    request,
+    ride_id: Optional[UUID] = Query(None, description="Filter by ride"),
+    park_id: Optional[UUID] = Query(None, description="Filter by park"),
+    is_coaster: Optional[bool] = Query(None, description="Filter coasters only"),
+    date_from: Optional[date] = Query(None, description="Credits from date"),
+    date_to: Optional[date] = Query(None, description="Credits to date"),
+    ordering: Optional[str] = Query("-first_ride_date", description="Sort by field")
+):
+    """
+    List your own ride credits.
+    
+    **Authentication:** Required
+    
+    **Filters:**
+    - ride_id: Specific ride
+    - park_id: Rides at specific park
+    - is_coaster: Coasters only
+    - date_from: Credits from date
+    - date_to: Credits to date
+    - ordering: Sort field (default: -first_ride_date)
+    
+    **Returns:** Paginated list of your ride credits
+    """
+    user = request.auth
+    
+    # Base query with optimizations
+    queryset = UserRideCredit.objects.filter(user=user).select_related('ride__park')
+    
+    # Apply ride filter
+    if ride_id:
+        queryset = queryset.filter(ride_id=ride_id)
+    
+    # Apply park filter
+    if park_id:
+        queryset = queryset.filter(ride__park_id=park_id)
+    
+    # Apply coaster filter
+    if is_coaster is not None:
+        queryset = queryset.filter(ride__is_coaster=is_coaster)
+    
+    # Apply date filters
+    if date_from:
+        queryset = queryset.filter(first_ride_date__gte=date_from)
+    if date_to:
+        queryset = queryset.filter(first_ride_date__lte=date_to)
+    
+    # Apply ordering
+    valid_order_fields = ['first_ride_date', 'ride_count', 'created', 'modified']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-first_ride_date')
+    
+    # Serialize credits
+    credits = [_serialize_ride_credit(credit) for credit in queryset]
+    return credits
+
+
+@router.get("/{credit_id}", response={200: RideCreditOut, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def get_ride_credit(request, credit_id: UUID):
+    """
+    Get a specific ride credit by ID.
+    
+    **Authentication:** Required (must be credit owner)
+    
+    **Parameters:**
+    - credit_id: Credit UUID
+    
+    **Returns:** Credit details
+    """
+    user = request.auth
+    
+    credit = get_object_or_404(
+        UserRideCredit.objects.select_related('ride__park'),
+        id=credit_id
+    )
+    
+    # Check ownership
+    if credit.user != user:
+        return 403, {'detail': 'You can only view your own ride credits'}
+    
+    credit_data = _serialize_ride_credit(credit)
+    return 200, credit_data
+
+
+@router.put("/{credit_id}", response={200: RideCreditOut, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def update_ride_credit(request, credit_id: UUID, data: RideCreditUpdateSchema):
+    """
+    Update a ride credit.
+    
+    **Authentication:** Required (must be credit owner)
+    
+    **Parameters:**
+    - credit_id: Credit UUID
+    - data: Fields to update
+    
+    **Returns:** Updated credit
+    """
+    user = request.auth
+    
+    credit = get_object_or_404(
+        UserRideCredit.objects.select_related('ride__park'),
+        id=credit_id
+    )
+    
+    # Check ownership
+    if credit.user != user:
+        return 403, {'detail': 'You can only update your own ride credits'}
+    
+    # Update fields
+    update_data = data.dict(exclude_unset=True)
+    for key, value in update_data.items():
+        setattr(credit, key, value)
+    
+    credit.save()
+    
+    logger.info(f"Ride credit updated: {credit.id} by {user.email}")
+    
+    credit_data = _serialize_ride_credit(credit)
+    return 200, credit_data
+
+
+@router.delete("/{credit_id}", response={204: None, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def delete_ride_credit(request, credit_id: UUID):
+    """
+    Delete a ride credit.
+    
+    **Authentication:** Required (must be credit owner)
+    
+    **Parameters:**
+    - credit_id: Credit UUID
+    
+    **Returns:** No content (204)
+    """
+    user = request.auth
+    
+    credit = get_object_or_404(UserRideCredit, id=credit_id)
+    
+    # Check ownership
+    if credit.user != user:
+        return 403, {'detail': 'You can only delete your own ride credits'}
+    
+    logger.info(f"Ride credit deleted: {credit.id} by {user.email}")
+    credit.delete()
+    
+    return 204, None
+
+
+# ============================================================================
+# User-Specific Endpoints
+# ============================================================================
+
+@router.get("/users/{user_id}", response={200: List[RideCreditOut], 403: ErrorResponse})
+@paginate(RideCreditPagination)
+def get_user_ride_credits(
+    request,
+    user_id: UUID,
+    park_id: Optional[UUID] = Query(None),
+    is_coaster: Optional[bool] = Query(None),
+    ordering: Optional[str] = Query("-first_ride_date")
+):
+    """
+    Get a user's ride credits.
+    
+    **Authentication:** Optional (respects privacy settings)
+    
+    **Parameters:**
+    - user_id: User UUID
+    - park_id: Filter by park (optional)
+    - is_coaster: Filter coasters only (optional)
+    - ordering: Sort field (default: -first_ride_date)
+    
+    **Returns:** Paginated list of user's ride credits
+    
+    **Note:** Only visible if user's profile is public or viewer is the owner.
+    """
+    target_user = get_object_or_404(User, id=user_id)
+    
+    # Check if current user
+    current_user = request.auth if hasattr(request, 'auth') else None
+    is_owner = current_user and current_user.id == target_user.id
+    
+    # Check privacy
+    if not is_owner:
+        # Check if profile is public
+        try:
+            profile = target_user.profile
+            if not profile.profile_public:
+                return 403, {'detail': 'This user\'s ride credits are private'}
+        except:
+            return 403, {'detail': 'This user\'s ride credits are private'}
+    
+    # Build query
+    queryset = UserRideCredit.objects.filter(user=target_user).select_related('ride__park')
+    
+    # Apply filters
+    if park_id:
+        queryset = queryset.filter(ride__park_id=park_id)
+    
+    if is_coaster is not None:
+        queryset = queryset.filter(ride__is_coaster=is_coaster)
+    
+    # Apply ordering
+    valid_order_fields = ['first_ride_date', 'ride_count', 'created']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-first_ride_date')
+    
+    # Serialize credits
+    credits = [_serialize_ride_credit(credit) for credit in queryset]
+    return credits
+
+
+@router.get("/users/{user_id}/stats", response={200: RideCreditStatsOut, 403: ErrorResponse})
+def get_user_ride_stats(request, user_id: UUID):
+    """
+    Get statistics about a user's ride credits.
+    
+    **Authentication:** Optional (respects privacy settings)
+    
+    **Parameters:**
+    - user_id: User UUID
+    
+    **Returns:** Statistics including total rides, credits, parks, etc.
+    """
+    target_user = get_object_or_404(User, id=user_id)
+    
+    # Check if current user
+    current_user = request.auth if hasattr(request, 'auth') else None
+    is_owner = current_user and current_user.id == target_user.id
+    
+    # Check privacy
+    if not is_owner:
+        try:
+            profile = target_user.profile
+            if not profile.profile_public:
+                return 403, {'detail': 'This user\'s statistics are private'}
+        except:
+            return 403, {'detail': 'This user\'s statistics are private'}
+    
+    # Get all credits
+    credits = UserRideCredit.objects.filter(user=target_user).select_related('ride__park')
+    
+    # Calculate basic stats
+    stats = credits.aggregate(
+        total_rides=Sum('ride_count'),
+        total_credits=Count('id'),
+        unique_parks=Count('ride__park', distinct=True),
+        coaster_count=Count('id', filter=Q(ride__is_coaster=True)),
+        first_credit_date=Min('first_ride_date'),
+        last_credit_date=Max('first_ride_date'),
+    )
+    
+    # Get top park
+    park_counts = credits.values('ride__park__name').annotate(
+        count=Count('id')
+    ).order_by('-count').first()
+    
+    top_park = park_counts['ride__park__name'] if park_counts else None
+    top_park_count = park_counts['count'] if park_counts else 0
+    
+    # Get recent credits (last 5)
+    recent_credits = credits.order_by('-first_ride_date')[:5]
+    recent_credits_data = [_serialize_ride_credit(c) for c in recent_credits]
+    
+    return 200, {
+        'total_rides': stats['total_rides'] or 0,
+        'total_credits': stats['total_credits'] or 0,
+        'unique_parks': stats['unique_parks'] or 0,
+        'coaster_count': stats['coaster_count'] or 0,
+        'first_credit_date': stats['first_credit_date'],
+        'last_credit_date': stats['last_credit_date'],
+        'top_park': top_park,
+        'top_park_count': top_park_count,
+        'recent_credits': recent_credits_data,
+    }

django-backend/api/v1/endpoints/ride_models.py

@@ -0,0 +1,640 @@
+"""
+Ride Model endpoints for API v1.
+
+Provides CRUD operations for RideModel entities with filtering and search.
+"""
+from typing import List, Optional
+from uuid import UUID
+from django.shortcuts import get_object_or_404
+from django.db.models import Q
+from ninja import Router, Query
+from ninja.pagination import paginate, PageNumberPagination
+
+from apps.entities.models import RideModel, Company
+from apps.entities.services.ride_model_submission import RideModelSubmissionService
+from apps.users.permissions import jwt_auth, require_auth
+from ..schemas import (
+    RideModelCreate,
+    RideModelUpdate,
+    RideModelOut,
+    RideModelListOut,
+    ErrorResponse,
+    HistoryListResponse,
+    HistoryEventDetailSchema,
+    HistoryComparisonSchema,
+    HistoryDiffCurrentSchema,
+    FieldHistorySchema,
+    HistoryActivitySummarySchema,
+    RollbackRequestSchema,
+    RollbackResponseSchema,
+    ErrorSchema
+)
+from ..services.history_service import HistoryService
+from django.core.exceptions import ValidationError
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+router = Router(tags=["Ride Models"])
+
+
+class RideModelPagination(PageNumberPagination):
+    """Custom pagination for ride models."""
+    page_size = 50
+
+
+@router.get(
+    "/",
+    response={200: List[RideModelOut]},
+    summary="List ride models",
+    description="Get a paginated list of ride models with optional filtering"
+)
+@paginate(RideModelPagination)
+def list_ride_models(
+    request,
+    search: Optional[str] = Query(None, description="Search by model name"),
+    manufacturer_id: Optional[UUID] = Query(None, description="Filter by manufacturer"),
+    model_type: Optional[str] = Query(None, description="Filter by model type"),
+    ordering: Optional[str] = Query("-created", description="Sort by field (prefix with - for descending)")
+):
+    """
+    List all ride models with optional filters.
+    
+    **Filters:**
+    - search: Search model names (case-insensitive partial match)
+    - manufacturer_id: Filter by manufacturer
+    - model_type: Filter by model type
+    - ordering: Sort results (default: -created)
+    
+    **Returns:** Paginated list of ride models
+    """
+    queryset = RideModel.objects.select_related('manufacturer').all()
+    
+    # Apply search filter
+    if search:
+        queryset = queryset.filter(
+            Q(name__icontains=search) | Q(description__icontains=search)
+        )
+    
+    # Apply manufacturer filter
+    if manufacturer_id:
+        queryset = queryset.filter(manufacturer_id=manufacturer_id)
+    
+    # Apply model type filter
+    if model_type:
+        queryset = queryset.filter(model_type=model_type)
+    
+    # Apply ordering
+    valid_order_fields = ['name', 'created', 'modified', 'installation_count']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    # Annotate with manufacturer name
+    for model in queryset:
+        model.manufacturer_name = model.manufacturer.name if model.manufacturer else None
+    
+    return queryset
+
+
+@router.get(
+    "/{model_id}",
+    response={200: RideModelOut, 404: ErrorResponse},
+    summary="Get ride model",
+    description="Retrieve a single ride model by ID"
+)
+def get_ride_model(request, model_id: UUID):
+    """
+    Get a ride model by ID.
+    
+    **Parameters:**
+    - model_id: UUID of the ride model
+    
+    **Returns:** Ride model details
+    """
+    model = get_object_or_404(RideModel.objects.select_related('manufacturer'), id=model_id)
+    model.manufacturer_name = model.manufacturer.name if model.manufacturer else None
+    return model
+
+
+@router.post(
+    "/",
+    response={201: RideModelOut, 202: dict, 400: ErrorResponse, 401: ErrorResponse, 404: ErrorResponse},
+    summary="Create ride model",
+    description="Create a new ride model through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def create_ride_model(request, payload: RideModelCreate):
+    """
+    Create a new ride model through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - payload: Ride model data (name, manufacturer, model_type, specifications, etc.)
+    
+    **Returns:** Created ride model (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Ride model created immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All ride models flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        
+        # Create ride model through Sacred Pipeline
+        submission, ride_model = RideModelSubmissionService.create_entity_submission(
+            user=user,
+            data=payload.dict(),
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, RideModel was created immediately
+        if ride_model:
+            logger.info(f"RideModel created (moderator): {ride_model.id} by {user.email}")
+            ride_model.manufacturer_name = ride_model.manufacturer.name if ride_model.manufacturer else None
+            return 201, ride_model
+        
+        # Regular user: submission pending moderation
+        logger.info(f"RideModel submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Ride model submission pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error creating ride model: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.put(
+    "/{model_id}",
+    response={200: RideModelOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Update ride model",
+    description="Update an existing ride model through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def update_ride_model(request, model_id: UUID, payload: RideModelUpdate):
+    """
+    Update a ride model through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - model_id: UUID of the ride model
+    - payload: Updated ride model data
+    
+    **Returns:** Updated ride model (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Updates applied immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All updates flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        model = get_object_or_404(RideModel.objects.select_related('manufacturer'), id=model_id)
+        
+        data = payload.dict(exclude_unset=True)
+        
+        # Update ride model through Sacred Pipeline
+        submission, updated_model = RideModelSubmissionService.update_entity_submission(
+            entity=model,
+            user=user,
+            update_data=data,
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, ride model was updated immediately
+        if updated_model:
+            logger.info(f"RideModel updated (moderator): {updated_model.id} by {user.email}")
+            updated_model.manufacturer_name = updated_model.manufacturer.name if updated_model.manufacturer else None
+            return 200, updated_model
+        
+        # Regular user: submission pending moderation
+        logger.info(f"RideModel update submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Ride model update pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error updating ride model: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.patch(
+    "/{model_id}",
+    response={200: RideModelOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Partial update ride model",
+    description="Partially update an existing ride model through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def partial_update_ride_model(request, model_id: UUID, payload: RideModelUpdate):
+    """
+    Partially update a ride model through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - model_id: UUID of the ride model
+    - payload: Fields to update (only provided fields are updated)
+    
+    **Returns:** Updated ride model (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Updates applied immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All updates flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        model = get_object_or_404(RideModel.objects.select_related('manufacturer'), id=model_id)
+        
+        data = payload.dict(exclude_unset=True)
+        
+        # Update ride model through Sacred Pipeline
+        submission, updated_model = RideModelSubmissionService.update_entity_submission(
+            entity=model,
+            user=user,
+            update_data=data,
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, ride model was updated immediately
+        if updated_model:
+            logger.info(f"RideModel partially updated (moderator): {updated_model.id} by {user.email}")
+            updated_model.manufacturer_name = updated_model.manufacturer.name if updated_model.manufacturer else None
+            return 200, updated_model
+        
+        # Regular user: submission pending moderation
+        logger.info(f"RideModel partial update submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Ride model update pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error partially updating ride model: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.delete(
+    "/{model_id}",
+    response={200: dict, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Delete ride model",
+    description="Delete a ride model through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def delete_ride_model(request, model_id: UUID):
+    """
+    Delete a ride model through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - model_id: UUID of the ride model
+    
+    **Returns:** Deletion confirmation (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: RideModel hard-deleted immediately (removed from database)
+    - Regular users: Deletion request created, enters moderation queue
+    
+    **Deletion Strategy:**
+    - Hard Delete: Removes ride model from database (RideModel has no status field for soft delete)
+    
+    **Note:** All deletions flow through ContentSubmission pipeline for moderation.
+    **Warning:** Deleting a ride model may affect related rides.
+    """
+    try:
+        user = request.auth
+        model = get_object_or_404(RideModel.objects.select_related('manufacturer'), id=model_id)
+        
+        # Delete ride model through Sacred Pipeline (hard delete - no status field)
+        submission, deleted = RideModelSubmissionService.delete_entity_submission(
+            entity=model,
+            user=user,
+            deletion_type='hard',  # RideModel has no status field
+            deletion_reason='',
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, deletion was applied immediately
+        if deleted:
+            logger.info(f"RideModel deleted (moderator): {model_id} by {user.email}")
+            return 200, {
+                'message': 'Ride model deleted successfully',
+                'entity_id': str(model_id),
+                'deletion_type': 'hard'
+            }
+        
+        # Regular user: deletion pending moderation
+        logger.info(f"RideModel deletion submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Ride model deletion request pending moderation. You will be notified when it is approved.',
+            'entity_id': str(model_id)
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error deleting ride model: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.get(
+    "/{model_id}/installations",
+    response={200: List[dict], 404: ErrorResponse},
+    summary="Get ride model installations",
+    description="Get all ride installations of this model"
+)
+def get_ride_model_installations(request, model_id: UUID):
+    """
+    Get all installations of a ride model.
+    
+    **Parameters:**
+    - model_id: UUID of the ride model
+    
+    **Returns:** List of rides using this model
+    """
+    model = get_object_or_404(RideModel, id=model_id)
+    rides = model.rides.select_related('park').all().values(
+        'id', 'name', 'slug', 'status', 'park__name', 'park__id'
+    )
+    return list(rides)
+
+
+# ============================================================================
+# History Endpoints
+# ============================================================================
+
+@router.get(
+    '/{model_id}/history/',
+    response={200: HistoryListResponse, 404: ErrorSchema},
+    summary="Get ride model history",
+    description="Get historical changes for a ride model"
+)
+def get_ride_model_history(
+    request,
+    model_id: UUID,
+    page: int = Query(1, ge=1),
+    page_size: int = Query(50, ge=1, le=100),
+    date_from: Optional[str] = Query(None, description="Filter from date (YYYY-MM-DD)"),
+    date_to: Optional[str] = Query(None, description="Filter to date (YYYY-MM-DD)")
+):
+    """Get history for a ride model."""
+    from datetime import datetime
+    
+    # Verify ride model exists
+    ride_model = get_object_or_404(RideModel, id=model_id)
+    
+    # Parse dates if provided
+    date_from_obj = datetime.fromisoformat(date_from).date() if date_from else None
+    date_to_obj = datetime.fromisoformat(date_to).date() if date_to else None
+    
+    # Get history
+    offset = (page - 1) * page_size
+    events, accessible_count = HistoryService.get_history(
+        'ridemodel', str(model_id), request.user,
+        date_from=date_from_obj, date_to=date_to_obj,
+        limit=page_size, offset=offset
+    )
+    
+    # Format events
+    formatted_events = []
+    for event in events:
+        formatted_events.append({
+            'id': event['id'],
+            'timestamp': event['timestamp'],
+            'operation': event['operation'],
+            'snapshot': event['snapshot'],
+            'changed_fields': event.get('changed_fields'),
+            'change_summary': event.get('change_summary', ''),
+            'can_rollback': HistoryService.can_rollback(request.user)
+        })
+    
+    # Calculate pagination
+    total_pages = (accessible_count + page_size - 1) // page_size
+    
+    return {
+        'entity_id': str(model_id),
+        'entity_type': 'ridemodel',
+        'entity_name': ride_model.name,
+        'total_events': accessible_count,
+        'accessible_events': accessible_count,
+        'access_limited': HistoryService.is_access_limited(request.user),
+        'access_reason': HistoryService.get_access_reason(request.user),
+        'events': formatted_events,
+        'pagination': {
+            'page': page,
+            'page_size': page_size,
+            'total_pages': total_pages,
+            'total_items': accessible_count
+        }
+    }
+
+
+@router.get(
+    '/{model_id}/history/{event_id}/',
+    response={200: HistoryEventDetailSchema, 404: ErrorSchema},
+    summary="Get specific ride model history event",
+    description="Get detailed information about a specific historical event"
+)
+def get_ride_model_history_event(request, model_id: UUID, event_id: int):
+    """Get a specific history event for a ride model."""
+    ride_model = get_object_or_404(RideModel, id=model_id)
+    event = HistoryService.get_event('ridemodel', event_id, request.user)
+    
+    if not event:
+        return 404, {"error": "Event not found or not accessible"}
+    
+    return {
+        'id': event['id'],
+        'timestamp': event['timestamp'],
+        'operation': event['operation'],
+        'entity_id': str(model_id),
+        'entity_type': 'ridemodel',
+        'entity_name': ride_model.name,
+        'snapshot': event['snapshot'],
+        'changed_fields': event.get('changed_fields'),
+        'metadata': event.get('metadata', {}),
+        'can_rollback': HistoryService.can_rollback(request.user),
+        'rollback_preview': None
+    }
+
+
+@router.get(
+    '/{model_id}/history/compare/',
+    response={200: HistoryComparisonSchema, 400: ErrorSchema, 404: ErrorSchema},
+    summary="Compare two ride model history events",
+    description="Compare two historical events for a ride model"
+)
+def compare_ride_model_history(
+    request,
+    model_id: UUID,
+    event1: int = Query(..., description="First event ID"),
+    event2: int = Query(..., description="Second event ID")
+):
+    """Compare two historical events for a ride model."""
+    ride_model = get_object_or_404(RideModel, id=model_id)
+    
+    try:
+        comparison = HistoryService.compare_events(
+            'ridemodel', event1, event2, request.user
+        )
+        
+        if not comparison:
+            return 404, {"error": "One or both events not found"}
+        
+        return {
+            'entity_id': str(model_id),
+            'entity_type': 'ridemodel',
+            'entity_name': ride_model.name,
+            'event1': comparison['event1'],
+            'event2': comparison['event2'],
+            'differences': comparison['differences'],
+            'changed_field_count': comparison['changed_field_count'],
+            'unchanged_field_count': comparison['unchanged_field_count'],
+            'time_between': comparison['time_between']
+        }
+    except ValueError as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{model_id}/history/{event_id}/diff-current/',
+    response={200: HistoryDiffCurrentSchema, 404: ErrorSchema},
+    summary="Compare historical event with current state",
+    description="Compare a historical event with the current ride model state"
+)
+def diff_ride_model_history_with_current(request, model_id: UUID, event_id: int):
+    """Compare historical event with current ride model state."""
+    ride_model = get_object_or_404(RideModel, id=model_id)
+    
+    try:
+        diff = HistoryService.compare_with_current(
+            'ridemodel', event_id, ride_model, request.user
+        )
+        
+        if not diff:
+            return 404, {"error": "Event not found"}
+        
+        return {
+            'entity_id': str(model_id),
+            'entity_type': 'ridemodel',
+            'entity_name': ride_model.name,
+            'event': diff['event'],
+            'current_state': diff['current_state'],
+            'differences': diff['differences'],
+            'changed_field_count': diff['changed_field_count'],
+            'time_since': diff['time_since']
+        }
+    except ValueError as e:
+        return 404, {"error": str(e)}
+
+
+@router.post(
+    '/{model_id}/history/{event_id}/rollback/',
+    response={200: RollbackResponseSchema, 400: ErrorSchema, 403: ErrorSchema},
+    summary="Rollback ride model to historical state",
+    description="Rollback ride model to a historical state (Moderators/Admins only)"
+)
+def rollback_ride_model(request, model_id: UUID, event_id: int, payload: RollbackRequestSchema):
+    """
+    Rollback ride model to a historical state.
+    
+    **Permission:** Moderators, Admins, Superusers only
+    """
+    # Check authentication
+    if not request.user or not request.user.is_authenticated:
+        return 401, {"error": "Authentication required"}
+    
+    # Check rollback permission
+    if not HistoryService.can_rollback(request.user):
+        return 403, {"error": "Only moderators and administrators can perform rollbacks"}
+    
+    ride_model = get_object_or_404(RideModel, id=model_id)
+    
+    try:
+        result = HistoryService.rollback_to_event(
+            ride_model, 'ridemodel', event_id, request.user,
+            fields=payload.fields,
+            comment=payload.comment,
+            create_backup=payload.create_backup
+        )
+        return result
+    except (ValueError, PermissionError) as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{model_id}/history/field/{field_name}/',
+    response={200: FieldHistorySchema, 404: ErrorSchema},
+    summary="Get field-specific history",
+    description="Get history of changes to a specific ride model field"
+)
+def get_ride_model_field_history(request, model_id: UUID, field_name: str):
+    """Get history of changes to a specific ride model field."""
+    ride_model = get_object_or_404(RideModel, id=model_id)
+    
+    history = HistoryService.get_field_history(
+        'ridemodel', str(model_id), field_name, request.user
+    )
+    
+    return {
+        'entity_id': str(model_id),
+        'entity_type': 'ridemodel',
+        'entity_name': ride_model.name,
+        'field': field_name,
+        'field_type': 'CharField',  # Could introspect this
+        **history
+    }
+
+
+@router.get(
+    '/{model_id}/history/summary/',
+    response={200: HistoryActivitySummarySchema, 404: ErrorSchema},
+    summary="Get ride model activity summary",
+    description="Get activity summary for a ride model"
+)
+def get_ride_model_activity_summary(request, model_id: UUID):
+    """Get activity summary for a ride model."""
+    ride_model = get_object_or_404(RideModel, id=model_id)
+    
+    summary = HistoryService.get_activity_summary(
+        'ridemodel', str(model_id), request.user
+    )
+    
+    return {
+        'entity_id': str(model_id),
+        'entity_type': 'ridemodel',
+        'entity_name': ride_model.name,
+        **summary
+    }

django-backend/api/v1/endpoints/rides.py

@@ -0,0 +1,772 @@
+"""
+Ride endpoints for API v1.
+
+Provides CRUD operations for Ride entities with filtering and search.
+"""
+from typing import List, Optional
+from uuid import UUID
+from django.shortcuts import get_object_or_404
+from django.db.models import Q
+from ninja import Router, Query
+from ninja.pagination import paginate, PageNumberPagination
+
+from apps.entities.models import Ride, Park, Company, RideModel
+from apps.entities.services.ride_submission import RideSubmissionService
+from apps.users.permissions import jwt_auth, require_auth
+from ..schemas import (
+    RideCreate,
+    RideUpdate,
+    RideOut,
+    RideListOut,
+    RideNameHistoryOut,
+    ErrorResponse,
+    HistoryListResponse,
+    HistoryEventDetailSchema,
+    HistoryComparisonSchema,
+    HistoryDiffCurrentSchema,
+    FieldHistorySchema,
+    HistoryActivitySummarySchema,
+    RollbackRequestSchema,
+    RollbackResponseSchema,
+    ErrorSchema
+)
+from ..services.history_service import HistoryService
+from django.core.exceptions import ValidationError
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+router = Router(tags=["Rides"])
+
+
+class RidePagination(PageNumberPagination):
+    """Custom pagination for rides."""
+    page_size = 50
+
+
+@router.get(
+    "/",
+    response={200: List[RideOut]},
+    summary="List rides",
+    description="Get a paginated list of rides with optional filtering"
+)
+@paginate(RidePagination)
+def list_rides(
+    request,
+    search: Optional[str] = Query(None, description="Search by ride name"),
+    park_id: Optional[UUID] = Query(None, description="Filter by park"),
+    ride_category: Optional[str] = Query(None, description="Filter by ride category"),
+    status: Optional[str] = Query(None, description="Filter by status"),
+    is_coaster: Optional[bool] = Query(None, description="Filter for roller coasters only"),
+    manufacturer_id: Optional[UUID] = Query(None, description="Filter by manufacturer"),
+    ordering: Optional[str] = Query("-created", description="Sort by field (prefix with - for descending)")
+):
+    """
+    List all rides with optional filters.
+    
+    **Filters:**
+    - search: Search ride names (case-insensitive partial match)
+    - park_id: Filter by park
+    - ride_category: Filter by ride category
+    - status: Filter by operational status
+    - is_coaster: Filter for roller coasters (true/false)
+    - manufacturer_id: Filter by manufacturer
+    - ordering: Sort results (default: -created)
+    
+    **Returns:** Paginated list of rides
+    """
+    queryset = Ride.objects.select_related('park', 'manufacturer', 'model').all()
+    
+    # Apply search filter
+    if search:
+        queryset = queryset.filter(
+            Q(name__icontains=search) | Q(description__icontains=search)
+        )
+    
+    # Apply park filter
+    if park_id:
+        queryset = queryset.filter(park_id=park_id)
+    
+    # Apply ride category filter
+    if ride_category:
+        queryset = queryset.filter(ride_category=ride_category)
+    
+    # Apply status filter
+    if status:
+        queryset = queryset.filter(status=status)
+    
+    # Apply coaster filter
+    if is_coaster is not None:
+        queryset = queryset.filter(is_coaster=is_coaster)
+    
+    # Apply manufacturer filter
+    if manufacturer_id:
+        queryset = queryset.filter(manufacturer_id=manufacturer_id)
+    
+    # Apply ordering
+    valid_order_fields = ['name', 'created', 'modified', 'opening_date', 'height', 'speed', 'length']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    # Annotate with related names
+    for ride in queryset:
+        ride.park_name = ride.park.name if ride.park else None
+        ride.manufacturer_name = ride.manufacturer.name if ride.manufacturer else None
+        ride.model_name = ride.model.name if ride.model else None
+    
+    return queryset
+
+
+# ============================================================================
+# History Endpoints
+# ============================================================================
+
+@router.get(
+    '/{ride_id}/history/',
+    response={200: HistoryListResponse, 404: ErrorSchema},
+    summary="Get ride history",
+    description="Get historical changes for a ride"
+)
+def get_ride_history(
+    request,
+    ride_id: UUID,
+    page: int = Query(1, ge=1),
+    page_size: int = Query(50, ge=1, le=100),
+    date_from: Optional[str] = Query(None, description="Filter from date (YYYY-MM-DD)"),
+    date_to: Optional[str] = Query(None, description="Filter to date (YYYY-MM-DD)")
+):
+    """Get history for a ride."""
+    from datetime import datetime
+    
+    # Verify ride exists
+    ride = get_object_or_404(Ride, id=ride_id)
+    
+    # Parse dates if provided
+    date_from_obj = datetime.fromisoformat(date_from).date() if date_from else None
+    date_to_obj = datetime.fromisoformat(date_to).date() if date_to else None
+    
+    # Get history
+    offset = (page - 1) * page_size
+    events, accessible_count = HistoryService.get_history(
+        'ride', str(ride_id), request.user,
+        date_from=date_from_obj, date_to=date_to_obj,
+        limit=page_size, offset=offset
+    )
+    
+    # Format events
+    formatted_events = []
+    for event in events:
+        formatted_events.append({
+            'id': event['id'],
+            'timestamp': event['timestamp'],
+            'operation': event['operation'],
+            'snapshot': event['snapshot'],
+            'changed_fields': event.get('changed_fields'),
+            'change_summary': event.get('change_summary', ''),
+            'can_rollback': HistoryService.can_rollback(request.user)
+        })
+    
+    # Calculate pagination
+    total_pages = (accessible_count + page_size - 1) // page_size
+    
+    return {
+        'entity_id': str(ride_id),
+        'entity_type': 'ride',
+        'entity_name': ride.name,
+        'total_events': accessible_count,
+        'accessible_events': accessible_count,
+        'access_limited': HistoryService.is_access_limited(request.user),
+        'access_reason': HistoryService.get_access_reason(request.user),
+        'events': formatted_events,
+        'pagination': {
+            'page': page,
+            'page_size': page_size,
+            'total_pages': total_pages,
+            'total_items': accessible_count
+        }
+    }
+
+
+@router.get(
+    '/{ride_id}/history/{event_id}/',
+    response={200: HistoryEventDetailSchema, 404: ErrorSchema},
+    summary="Get specific ride history event",
+    description="Get detailed information about a specific historical event"
+)
+def get_ride_history_event(request, ride_id: UUID, event_id: int):
+    """Get a specific history event for a ride."""
+    ride = get_object_or_404(Ride, id=ride_id)
+    event = HistoryService.get_event('ride', event_id, request.user)
+    
+    if not event:
+        return 404, {"error": "Event not found or not accessible"}
+    
+    return {
+        'id': event['id'],
+        'timestamp': event['timestamp'],
+        'operation': event['operation'],
+        'entity_id': str(ride_id),
+        'entity_type': 'ride',
+        'entity_name': ride.name,
+        'snapshot': event['snapshot'],
+        'changed_fields': event.get('changed_fields'),
+        'metadata': event.get('metadata', {}),
+        'can_rollback': HistoryService.can_rollback(request.user),
+        'rollback_preview': None
+    }
+
+
+@router.get(
+    '/{ride_id}/history/compare/',
+    response={200: HistoryComparisonSchema, 400: ErrorSchema, 404: ErrorSchema},
+    summary="Compare two ride history events",
+    description="Compare two historical events for a ride"
+)
+def compare_ride_history(
+    request,
+    ride_id: UUID,
+    event1: int = Query(..., description="First event ID"),
+    event2: int = Query(..., description="Second event ID")
+):
+    """Compare two historical events for a ride."""
+    ride = get_object_or_404(Ride, id=ride_id)
+    
+    try:
+        comparison = HistoryService.compare_events(
+            'ride', event1, event2, request.user
+        )
+        
+        if not comparison:
+            return 404, {"error": "One or both events not found"}
+        
+        return {
+            'entity_id': str(ride_id),
+            'entity_type': 'ride',
+            'entity_name': ride.name,
+            'event1': comparison['event1'],
+            'event2': comparison['event2'],
+            'differences': comparison['differences'],
+            'changed_field_count': comparison['changed_field_count'],
+            'unchanged_field_count': comparison['unchanged_field_count'],
+            'time_between': comparison['time_between']
+        }
+    except ValueError as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{ride_id}/history/{event_id}/diff-current/',
+    response={200: HistoryDiffCurrentSchema, 404: ErrorSchema},
+    summary="Compare historical event with current state",
+    description="Compare a historical event with the current ride state"
+)
+def diff_ride_history_with_current(request, ride_id: UUID, event_id: int):
+    """Compare historical event with current ride state."""
+    ride = get_object_or_404(Ride, id=ride_id)
+    
+    try:
+        diff = HistoryService.compare_with_current(
+            'ride', event_id, ride, request.user
+        )
+        
+        if not diff:
+            return 404, {"error": "Event not found"}
+        
+        return {
+            'entity_id': str(ride_id),
+            'entity_type': 'ride',
+            'entity_name': ride.name,
+            'event': diff['event'],
+            'current_state': diff['current_state'],
+            'differences': diff['differences'],
+            'changed_field_count': diff['changed_field_count'],
+            'time_since': diff['time_since']
+        }
+    except ValueError as e:
+        return 404, {"error": str(e)}
+
+
+@router.post(
+    '/{ride_id}/history/{event_id}/rollback/',
+    response={200: RollbackResponseSchema, 400: ErrorSchema, 403: ErrorSchema},
+    summary="Rollback ride to historical state",
+    description="Rollback ride to a historical state (Moderators/Admins only)"
+)
+def rollback_ride(request, ride_id: UUID, event_id: int, payload: RollbackRequestSchema):
+    """
+    Rollback ride to a historical state.
+    
+    **Permission:** Moderators, Admins, Superusers only
+    """
+    # Check authentication
+    if not request.user or not request.user.is_authenticated:
+        return 401, {"error": "Authentication required"}
+    
+    # Check rollback permission
+    if not HistoryService.can_rollback(request.user):
+        return 403, {"error": "Only moderators and administrators can perform rollbacks"}
+    
+    ride = get_object_or_404(Ride, id=ride_id)
+    
+    try:
+        result = HistoryService.rollback_to_event(
+            ride, 'ride', event_id, request.user,
+            fields=payload.fields,
+            comment=payload.comment,
+            create_backup=payload.create_backup
+        )
+        return result
+    except (ValueError, PermissionError) as e:
+        return 400, {"error": str(e)}
+
+
+@router.get(
+    '/{ride_id}/history/field/{field_name}/',
+    response={200: FieldHistorySchema, 404: ErrorSchema},
+    summary="Get field-specific history",
+    description="Get history of changes to a specific ride field"
+)
+def get_ride_field_history(request, ride_id: UUID, field_name: str):
+    """Get history of changes to a specific ride field."""
+    ride = get_object_or_404(Ride, id=ride_id)
+    
+    history = HistoryService.get_field_history(
+        'ride', str(ride_id), field_name, request.user
+    )
+    
+    return {
+        'entity_id': str(ride_id),
+        'entity_type': 'ride',
+        'entity_name': ride.name,
+        'field': field_name,
+        'field_type': 'CharField',  # Could introspect this
+        **history
+    }
+
+
+@router.get(
+    '/{ride_id}/history/summary/',
+    response={200: HistoryActivitySummarySchema, 404: ErrorSchema},
+    summary="Get ride activity summary",
+    description="Get activity summary for a ride"
+)
+def get_ride_activity_summary(request, ride_id: UUID):
+    """Get activity summary for a ride."""
+    ride = get_object_or_404(Ride, id=ride_id)
+    
+    summary = HistoryService.get_activity_summary(
+        'ride', str(ride_id), request.user
+    )
+    
+    return {
+        'entity_id': str(ride_id),
+        'entity_type': 'ride',
+        'entity_name': ride.name,
+        **summary
+    }
+
+
+@router.get(
+    "/{ride_id}",
+    response={200: RideOut, 404: ErrorResponse},
+    summary="Get ride",
+    description="Retrieve a single ride by ID"
+)
+def get_ride(request, ride_id: UUID):
+    """
+    Get a ride by ID.
+    
+    **Parameters:**
+    - ride_id: UUID of the ride
+    
+    **Returns:** Ride details
+    """
+    ride = get_object_or_404(
+        Ride.objects.select_related('park', 'manufacturer', 'model'),
+        id=ride_id
+    )
+    ride.park_name = ride.park.name if ride.park else None
+    ride.manufacturer_name = ride.manufacturer.name if ride.manufacturer else None
+    ride.model_name = ride.model.name if ride.model else None
+    return ride
+
+
+@router.get(
+    "/{ride_id}/name-history/",
+    response={200: List[RideNameHistoryOut], 404: ErrorResponse},
+    summary="Get ride name history",
+    description="Get historical names for a ride"
+)
+def get_ride_name_history(request, ride_id: UUID):
+    """
+    Get historical names for a ride.
+    
+    **Parameters:**
+    - ride_id: UUID of the ride
+    
+    **Returns:** List of former ride names with date ranges
+    
+    **Example Response:**
+    ```json
+    [
+        {
+            "id": "...",
+            "former_name": "Original Name",
+            "from_year": 2000,
+            "to_year": 2010,
+            "date_changed": "2010-05-15",
+            "date_changed_precision": "day",
+            "reason": "Rebranding",
+            "order_index": 1,
+            "created_at": "...",
+            "updated_at": "..."
+        }
+    ]
+    ```
+    """
+    ride = get_object_or_404(Ride, id=ride_id)
+    name_history = ride.name_history.all()
+    return list(name_history)
+
+
+@router.post(
+    "/",
+    response={201: RideOut, 202: dict, 400: ErrorResponse, 401: ErrorResponse, 404: ErrorResponse},
+    summary="Create ride",
+    description="Create a new ride through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def create_ride(request, payload: RideCreate):
+    """
+    Create a new ride through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - payload: Ride data (name, park, ride_category, manufacturer, model, etc.)
+    
+    **Returns:** Created ride (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Ride created immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All rides flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        
+        # Create ride through Sacred Pipeline
+        submission, ride = RideSubmissionService.create_entity_submission(
+            user=user,
+            data=payload.dict(),
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, Ride was created immediately
+        if ride:
+            logger.info(f"Ride created (moderator): {ride.id} by {user.email}")
+            ride.park_name = ride.park.name if ride.park else None
+            ride.manufacturer_name = ride.manufacturer.name if ride.manufacturer else None
+            ride.model_name = ride.model.name if ride.model else None
+            return 201, ride
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Ride submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Ride submission pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error creating ride: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.put(
+    "/{ride_id}",
+    response={200: RideOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Update ride",
+    description="Update an existing ride through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def update_ride(request, ride_id: UUID, payload: RideUpdate):
+    """
+    Update a ride through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - ride_id: UUID of the ride
+    - payload: Updated ride data
+    
+    **Returns:** Updated ride (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Updates applied immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All updates flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        ride = get_object_or_404(
+            Ride.objects.select_related('park', 'manufacturer', 'model'),
+            id=ride_id
+        )
+        
+        data = payload.dict(exclude_unset=True)
+        
+        # Update ride through Sacred Pipeline
+        submission, updated_ride = RideSubmissionService.update_entity_submission(
+            entity=ride,
+            user=user,
+            update_data=data,
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, ride was updated immediately
+        if updated_ride:
+            logger.info(f"Ride updated (moderator): {updated_ride.id} by {user.email}")
+            updated_ride.park_name = updated_ride.park.name if updated_ride.park else None
+            updated_ride.manufacturer_name = updated_ride.manufacturer.name if updated_ride.manufacturer else None
+            updated_ride.model_name = updated_ride.model.name if updated_ride.model else None
+            return 200, updated_ride
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Ride update submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Ride update pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error updating ride: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.patch(
+    "/{ride_id}",
+    response={200: RideOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Partial update ride",
+    description="Partially update an existing ride through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def partial_update_ride(request, ride_id: UUID, payload: RideUpdate):
+    """
+    Partially update a ride through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - ride_id: UUID of the ride
+    - payload: Fields to update (only provided fields are updated)
+    
+    **Returns:** Updated ride (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Updates applied immediately (bypass moderation)
+    - Regular users: Submission created, enters moderation queue
+    
+    **Note:** All updates flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        ride = get_object_or_404(
+            Ride.objects.select_related('park', 'manufacturer', 'model'),
+            id=ride_id
+        )
+        
+        data = payload.dict(exclude_unset=True)
+        
+        # Update ride through Sacred Pipeline
+        submission, updated_ride = RideSubmissionService.update_entity_submission(
+            entity=ride,
+            user=user,
+            update_data=data,
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, ride was updated immediately
+        if updated_ride:
+            logger.info(f"Ride partially updated (moderator): {updated_ride.id} by {user.email}")
+            updated_ride.park_name = updated_ride.park.name if updated_ride.park else None
+            updated_ride.manufacturer_name = updated_ride.manufacturer.name if updated_ride.manufacturer else None
+            updated_ride.model_name = updated_ride.model.name if updated_ride.model else None
+            return 200, updated_ride
+        
+        # Regular user: submission pending moderation
+        logger.info(f"Ride partial update submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Ride update pending moderation. You will be notified when it is approved.',
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error partially updating ride: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.delete(
+    "/{ride_id}",
+    response={200: dict, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse},
+    summary="Delete ride",
+    description="Delete a ride through the Sacred Pipeline (requires authentication)"
+)
+@require_auth
+def delete_ride(request, ride_id: UUID):
+    """
+    Delete a ride through the Sacred Pipeline.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - ride_id: UUID of the ride
+    
+    **Returns:** Deletion confirmation (moderators) or submission confirmation (regular users)
+    
+    **Flow:**
+    - Moderators: Ride soft-deleted immediately (status set to 'closed')
+    - Regular users: Deletion request created, enters moderation queue
+    
+    **Deletion Strategy:**
+    - Soft Delete (default): Sets ride status to 'closed', preserves data
+    - Hard Delete: Actually removes from database (moderators only)
+    
+    **Note:** All deletions flow through ContentSubmission pipeline for moderation.
+    """
+    try:
+        user = request.auth
+        ride = get_object_or_404(Ride.objects.select_related('park', 'manufacturer'), id=ride_id)
+        
+        # Delete ride through Sacred Pipeline (soft delete by default)
+        submission, deleted = RideSubmissionService.delete_entity_submission(
+            entity=ride,
+            user=user,
+            deletion_type='soft',
+            deletion_reason='',
+            source='api',
+            ip_address=request.META.get('REMOTE_ADDR'),
+            user_agent=request.META.get('HTTP_USER_AGENT', '')
+        )
+        
+        # If moderator bypass happened, deletion was applied immediately
+        if deleted:
+            logger.info(f"Ride deleted (moderator): {ride_id} by {user.email}")
+            return 200, {
+                'message': 'Ride deleted successfully',
+                'entity_id': str(ride_id),
+                'deletion_type': 'soft'
+            }
+        
+        # Regular user: deletion pending moderation
+        logger.info(f"Ride deletion submission created: {submission.id} by {user.email}")
+        return 202, {
+            'submission_id': str(submission.id),
+            'status': submission.status,
+            'message': 'Ride deletion request pending moderation. You will be notified when it is approved.',
+            'entity_id': str(ride_id)
+        }
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error deleting ride: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.get(
+    "/coasters/",
+    response={200: List[RideOut]},
+    summary="List roller coasters",
+    description="Get a paginated list of roller coasters only"
+)
+@paginate(RidePagination)
+def list_coasters(
+    request,
+    search: Optional[str] = Query(None, description="Search by ride name"),
+    park_id: Optional[UUID] = Query(None, description="Filter by park"),
+    status: Optional[str] = Query(None, description="Filter by status"),
+    manufacturer_id: Optional[UUID] = Query(None, description="Filter by manufacturer"),
+    min_height: Optional[float] = Query(None, description="Minimum height in feet"),
+    min_speed: Optional[float] = Query(None, description="Minimum speed in mph"),
+    ordering: Optional[str] = Query("-height", description="Sort by field (prefix with - for descending)")
+):
+    """
+    List only roller coasters with optional filters.
+    
+    **Filters:**
+    - search: Search coaster names
+    - park_id: Filter by park
+    - status: Filter by operational status
+    - manufacturer_id: Filter by manufacturer
+    - min_height: Minimum height filter
+    - min_speed: Minimum speed filter
+    - ordering: Sort results (default: -height)
+    
+    **Returns:** Paginated list of roller coasters
+    """
+    queryset = Ride.objects.filter(is_coaster=True).select_related(
+        'park', 'manufacturer', 'model'
+    )
+    
+    # Apply search filter
+    if search:
+        queryset = queryset.filter(
+            Q(name__icontains=search) | Q(description__icontains=search)
+        )
+    
+    # Apply park filter
+    if park_id:
+        queryset = queryset.filter(park_id=park_id)
+    
+    # Apply status filter
+    if status:
+        queryset = queryset.filter(status=status)
+    
+    # Apply manufacturer filter
+    if manufacturer_id:
+        queryset = queryset.filter(manufacturer_id=manufacturer_id)
+    
+    # Apply height filter
+    if min_height is not None:
+        queryset = queryset.filter(height__gte=min_height)
+    
+    # Apply speed filter
+    if min_speed is not None:
+        queryset = queryset.filter(speed__gte=min_speed)
+    
+    # Apply ordering
+    valid_order_fields = ['name', 'height', 'speed', 'length', 'opening_date', 'inversions']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-height')
+    
+    # Annotate with related names
+    for ride in queryset:
+        ride.park_name = ride.park.name if ride.park else None
+        ride.manufacturer_name = ride.manufacturer.name if ride.manufacturer else None
+        ride.model_name = ride.model.name if ride.model else None
+    
+    return queryset

django-backend/api/v1/endpoints/search.py

@@ -0,0 +1,438 @@
+"""
+Search and autocomplete endpoints for ThrillWiki API.
+
+Provides full-text search and filtering across all entity types.
+"""
+from typing import List, Optional
+from uuid import UUID
+from datetime import date
+from decimal import Decimal
+
+from django.http import HttpRequest
+from ninja import Router, Query
+
+from apps.entities.search import SearchService
+from apps.users.permissions import jwt_auth
+from api.v1.schemas import (
+    GlobalSearchResponse,
+    CompanySearchResult,
+    RideModelSearchResult,
+    ParkSearchResult,
+    RideSearchResult,
+    AutocompleteResponse,
+    AutocompleteItem,
+    ErrorResponse,
+)
+
+router = Router(tags=["Search"])
+search_service = SearchService()
+
+
+# ============================================================================
+# Helper Functions
+# ============================================================================
+
+def _company_to_search_result(company) -> CompanySearchResult:
+    """Convert Company model to search result."""
+    return CompanySearchResult(
+        id=company.id,
+        name=company.name,
+        slug=company.slug,
+        entity_type='company',
+        description=company.description,
+        image_url=company.logo_image_url or None,
+        company_types=company.company_types or [],
+        park_count=company.park_count,
+        ride_count=company.ride_count,
+    )
+
+
+def _ride_model_to_search_result(model) -> RideModelSearchResult:
+    """Convert RideModel to search result."""
+    return RideModelSearchResult(
+        id=model.id,
+        name=model.name,
+        slug=model.slug,
+        entity_type='ride_model',
+        description=model.description,
+        image_url=model.image_url or None,
+        manufacturer_name=model.manufacturer.name if model.manufacturer else '',
+        model_type=model.model_type,
+        installation_count=model.installation_count,
+    )
+
+
+def _park_to_search_result(park) -> ParkSearchResult:
+    """Convert Park model to search result."""
+    return ParkSearchResult(
+        id=park.id,
+        name=park.name,
+        slug=park.slug,
+        entity_type='park',
+        description=park.description,
+        image_url=park.banner_image_url or park.logo_image_url or None,
+        park_type=park.park_type,
+        status=park.status,
+        operator_name=park.operator.name if park.operator else None,
+        ride_count=park.ride_count,
+        coaster_count=park.coaster_count,
+        coordinates=park.coordinates,
+    )
+
+
+def _ride_to_search_result(ride) -> RideSearchResult:
+    """Convert Ride model to search result."""
+    return RideSearchResult(
+        id=ride.id,
+        name=ride.name,
+        slug=ride.slug,
+        entity_type='ride',
+        description=ride.description,
+        image_url=ride.image_url or None,
+        park_name=ride.park.name if ride.park else '',
+        park_slug=ride.park.slug if ride.park else '',
+        manufacturer_name=ride.manufacturer.name if ride.manufacturer else None,
+        ride_category=ride.ride_category,
+        status=ride.status,
+        is_coaster=ride.is_coaster,
+    )
+
+
+# ============================================================================
+# Search Endpoints
+# ============================================================================
+
+@router.get(
+    "",
+    response={200: GlobalSearchResponse, 400: ErrorResponse},
+    summary="Global search across all entities"
+)
+def search_all(
+    request: HttpRequest,
+    q: str = Query(..., min_length=2, max_length=200, description="Search query"),
+    entity_types: Optional[List[str]] = Query(None, description="Filter by entity types (company, ride_model, park, ride)"),
+    limit: int = Query(20, ge=1, le=100, description="Maximum results per entity type"),
+):
+    """
+    Search across all entity types with full-text search.
+    
+    - **q**: Search query (minimum 2 characters)
+    - **entity_types**: Optional list of entity types to search (defaults to all)
+    - **limit**: Maximum results per entity type (1-100, default 20)
+    
+    Returns results grouped by entity type.
+    """
+    try:
+        results = search_service.search_all(
+            query=q,
+            entity_types=entity_types,
+            limit=limit
+        )
+        
+        # Convert to schema objects
+        response_data = {
+            'query': q,
+            'total_results': 0,
+            'companies': [],
+            'ride_models': [],
+            'parks': [],
+            'rides': [],
+        }
+        
+        if 'companies' in results:
+            response_data['companies'] = [
+                _company_to_search_result(c) for c in results['companies']
+            ]
+            response_data['total_results'] += len(response_data['companies'])
+        
+        if 'ride_models' in results:
+            response_data['ride_models'] = [
+                _ride_model_to_search_result(m) for m in results['ride_models']
+            ]
+            response_data['total_results'] += len(response_data['ride_models'])
+        
+        if 'parks' in results:
+            response_data['parks'] = [
+                _park_to_search_result(p) for p in results['parks']
+            ]
+            response_data['total_results'] += len(response_data['parks'])
+        
+        if 'rides' in results:
+            response_data['rides'] = [
+                _ride_to_search_result(r) for r in results['rides']
+            ]
+            response_data['total_results'] += len(response_data['rides'])
+        
+        return GlobalSearchResponse(**response_data)
+    
+    except Exception as e:
+        return 400, ErrorResponse(detail=str(e))
+
+
+@router.get(
+    "/companies",
+    response={200: List[CompanySearchResult], 400: ErrorResponse},
+    summary="Search companies"
+)
+def search_companies(
+    request: HttpRequest,
+    q: str = Query(..., min_length=2, max_length=200, description="Search query"),
+    company_types: Optional[List[str]] = Query(None, description="Filter by company types"),
+    founded_after: Optional[date] = Query(None, description="Founded after date"),
+    founded_before: Optional[date] = Query(None, description="Founded before date"),
+    limit: int = Query(20, ge=1, le=100, description="Maximum results"),
+):
+    """
+    Search companies with optional filters.
+    
+    - **q**: Search query
+    - **company_types**: Filter by types (manufacturer, operator, designer, etc.)
+    - **founded_after/before**: Filter by founding date range
+    - **limit**: Maximum results (1-100, default 20)
+    """
+    try:
+        filters = {}
+        if company_types:
+            filters['company_types'] = company_types
+        if founded_after:
+            filters['founded_after'] = founded_after
+        if founded_before:
+            filters['founded_before'] = founded_before
+        
+        results = search_service.search_companies(
+            query=q,
+            filters=filters if filters else None,
+            limit=limit
+        )
+        
+        return [_company_to_search_result(c) for c in results]
+    
+    except Exception as e:
+        return 400, ErrorResponse(detail=str(e))
+
+
+@router.get(
+    "/ride-models",
+    response={200: List[RideModelSearchResult], 400: ErrorResponse},
+    summary="Search ride models"
+)
+def search_ride_models(
+    request: HttpRequest,
+    q: str = Query(..., min_length=2, max_length=200, description="Search query"),
+    manufacturer_id: Optional[UUID] = Query(None, description="Filter by manufacturer"),
+    model_type: Optional[str] = Query(None, description="Filter by model type"),
+    limit: int = Query(20, ge=1, le=100, description="Maximum results"),
+):
+    """
+    Search ride models with optional filters.
+    
+    - **q**: Search query
+    - **manufacturer_id**: Filter by specific manufacturer
+    - **model_type**: Filter by model type
+    - **limit**: Maximum results (1-100, default 20)
+    """
+    try:
+        filters = {}
+        if manufacturer_id:
+            filters['manufacturer_id'] = manufacturer_id
+        if model_type:
+            filters['model_type'] = model_type
+        
+        results = search_service.search_ride_models(
+            query=q,
+            filters=filters if filters else None,
+            limit=limit
+        )
+        
+        return [_ride_model_to_search_result(m) for m in results]
+    
+    except Exception as e:
+        return 400, ErrorResponse(detail=str(e))
+
+
+@router.get(
+    "/parks",
+    response={200: List[ParkSearchResult], 400: ErrorResponse},
+    summary="Search parks"
+)
+def search_parks(
+    request: HttpRequest,
+    q: str = Query(..., min_length=2, max_length=200, description="Search query"),
+    status: Optional[str] = Query(None, description="Filter by status"),
+    park_type: Optional[str] = Query(None, description="Filter by park type"),
+    operator_id: Optional[UUID] = Query(None, description="Filter by operator"),
+    opening_after: Optional[date] = Query(None, description="Opened after date"),
+    opening_before: Optional[date] = Query(None, description="Opened before date"),
+    latitude: Optional[float] = Query(None, description="Search center latitude"),
+    longitude: Optional[float] = Query(None, description="Search center longitude"),
+    radius: Optional[float] = Query(None, ge=0, le=500, description="Search radius in km (PostGIS only)"),
+    limit: int = Query(20, ge=1, le=100, description="Maximum results"),
+):
+    """
+    Search parks with optional filters including location-based search.
+    
+    - **q**: Search query
+    - **status**: Filter by operational status
+    - **park_type**: Filter by park type
+    - **operator_id**: Filter by operator company
+    - **opening_after/before**: Filter by opening date range
+    - **latitude/longitude/radius**: Location-based filtering (PostGIS only)
+    - **limit**: Maximum results (1-100, default 20)
+    """
+    try:
+        filters = {}
+        if status:
+            filters['status'] = status
+        if park_type:
+            filters['park_type'] = park_type
+        if operator_id:
+            filters['operator_id'] = operator_id
+        if opening_after:
+            filters['opening_after'] = opening_after
+        if opening_before:
+            filters['opening_before'] = opening_before
+        
+        # Location-based search (PostGIS only)
+        if latitude is not None and longitude is not None and radius is not None:
+            filters['location'] = (longitude, latitude)
+            filters['radius'] = radius
+        
+        results = search_service.search_parks(
+            query=q,
+            filters=filters if filters else None,
+            limit=limit
+        )
+        
+        return [_park_to_search_result(p) for p in results]
+    
+    except Exception as e:
+        return 400, ErrorResponse(detail=str(e))
+
+
+@router.get(
+    "/rides",
+    response={200: List[RideSearchResult], 400: ErrorResponse},
+    summary="Search rides"
+)
+def search_rides(
+    request: HttpRequest,
+    q: str = Query(..., min_length=2, max_length=200, description="Search query"),
+    park_id: Optional[UUID] = Query(None, description="Filter by park"),
+    manufacturer_id: Optional[UUID] = Query(None, description="Filter by manufacturer"),
+    model_id: Optional[UUID] = Query(None, description="Filter by model"),
+    status: Optional[str] = Query(None, description="Filter by status"),
+    ride_category: Optional[str] = Query(None, description="Filter by category"),
+    is_coaster: Optional[bool] = Query(None, description="Filter coasters only"),
+    opening_after: Optional[date] = Query(None, description="Opened after date"),
+    opening_before: Optional[date] = Query(None, description="Opened before date"),
+    min_height: Optional[Decimal] = Query(None, description="Minimum height in feet"),
+    max_height: Optional[Decimal] = Query(None, description="Maximum height in feet"),
+    min_speed: Optional[Decimal] = Query(None, description="Minimum speed in mph"),
+    max_speed: Optional[Decimal] = Query(None, description="Maximum speed in mph"),
+    limit: int = Query(20, ge=1, le=100, description="Maximum results"),
+):
+    """
+    Search rides with extensive filtering options.
+    
+    - **q**: Search query
+    - **park_id**: Filter by specific park
+    - **manufacturer_id**: Filter by manufacturer
+    - **model_id**: Filter by specific ride model
+    - **status**: Filter by operational status
+    - **ride_category**: Filter by category (roller_coaster, flat_ride, etc.)
+    - **is_coaster**: Filter to show only coasters
+    - **opening_after/before**: Filter by opening date range
+    - **min_height/max_height**: Filter by height range (feet)
+    - **min_speed/max_speed**: Filter by speed range (mph)
+    - **limit**: Maximum results (1-100, default 20)
+    """
+    try:
+        filters = {}
+        if park_id:
+            filters['park_id'] = park_id
+        if manufacturer_id:
+            filters['manufacturer_id'] = manufacturer_id
+        if model_id:
+            filters['model_id'] = model_id
+        if status:
+            filters['status'] = status
+        if ride_category:
+            filters['ride_category'] = ride_category
+        if is_coaster is not None:
+            filters['is_coaster'] = is_coaster
+        if opening_after:
+            filters['opening_after'] = opening_after
+        if opening_before:
+            filters['opening_before'] = opening_before
+        if min_height:
+            filters['min_height'] = min_height
+        if max_height:
+            filters['max_height'] = max_height
+        if min_speed:
+            filters['min_speed'] = min_speed
+        if max_speed:
+            filters['max_speed'] = max_speed
+        
+        results = search_service.search_rides(
+            query=q,
+            filters=filters if filters else None,
+            limit=limit
+        )
+        
+        return [_ride_to_search_result(r) for r in results]
+    
+    except Exception as e:
+        return 400, ErrorResponse(detail=str(e))
+
+
+# ============================================================================
+# Autocomplete Endpoint
+# ============================================================================
+
+@router.get(
+    "/autocomplete",
+    response={200: AutocompleteResponse, 400: ErrorResponse},
+    summary="Autocomplete suggestions"
+)
+def autocomplete(
+    request: HttpRequest,
+    q: str = Query(..., min_length=2, max_length=100, description="Partial search query"),
+    entity_type: Optional[str] = Query(None, description="Filter by entity type (company, park, ride, ride_model)"),
+    limit: int = Query(10, ge=1, le=20, description="Maximum suggestions"),
+):
+    """
+    Get autocomplete suggestions for search.
+    
+    - **q**: Partial query (minimum 2 characters)
+    - **entity_type**: Optional entity type filter
+    - **limit**: Maximum suggestions (1-20, default 10)
+    
+    Returns quick name-based suggestions for autocomplete UIs.
+    """
+    try:
+        suggestions = search_service.autocomplete(
+            query=q,
+            entity_type=entity_type,
+            limit=limit
+        )
+        
+        # Convert to schema objects
+        items = [
+            AutocompleteItem(
+                id=s['id'],
+                name=s['name'],
+                slug=s['slug'],
+                entity_type=s['entity_type'],
+                park_name=s.get('park_name'),
+                manufacturer_name=s.get('manufacturer_name'),
+            )
+            for s in suggestions
+        ]
+        
+        return AutocompleteResponse(
+            query=q,
+            suggestions=items
+        )
+    
+    except Exception as e:
+        return 400, ErrorResponse(detail=str(e))

django-backend/api/v1/endpoints/seo.py

@@ -0,0 +1,155 @@
+"""
+SEO Meta Tag API Endpoints
+
+Provides meta tag data for frontend pages to enable dynamic SEO,
+OpenGraph social sharing, and structured data.
+"""
+
+from ninja import Router
+from django.shortcuts import get_object_or_404
+from django.http import JsonResponse
+
+from apps.entities.models import Park, Ride, Company, RideModel
+from apps.core.utils.seo import SEOTags
+
+router = Router(tags=['SEO'])
+
+
+@router.get('/meta/home')
+def get_home_meta(request):
+    """
+    Get SEO meta tags for the home page.
+    
+    Returns:
+        Dictionary of meta tags including OpenGraph, Twitter Cards, and structured data
+    """
+    return SEOTags.for_home()
+
+
+@router.get('/meta/park/{park_slug}')
+def get_park_meta(request, park_slug: str):
+    """
+    Get SEO meta tags for a park page.
+    
+    Args:
+        park_slug: URL slug of the park
+        
+    Returns:
+        Dictionary of meta tags including OpenGraph, Twitter Cards, and canonical URL
+    """
+    park = get_object_or_404(
+        Park.objects.select_related('locality', 'country'),
+        slug=park_slug,
+        is_active=True
+    )
+    return SEOTags.for_park(park)
+
+
+@router.get('/meta/ride/{park_slug}/{ride_slug}')
+def get_ride_meta(request, park_slug: str, ride_slug: str):
+    """
+    Get SEO meta tags for a ride page.
+    
+    Args:
+        park_slug: URL slug of the park
+        ride_slug: URL slug of the ride
+        
+    Returns:
+        Dictionary of meta tags including OpenGraph, Twitter Cards, and canonical URL
+    """
+    ride = get_object_or_404(
+        Ride.objects.select_related(
+            'park',
+            'ride_type',
+            'manufacturer'
+        ),
+        slug=ride_slug,
+        park__slug=park_slug,
+        is_active=True
+    )
+    return SEOTags.for_ride(ride)
+
+
+@router.get('/meta/company/{company_slug}')
+def get_company_meta(request, company_slug: str):
+    """
+    Get SEO meta tags for a company/manufacturer page.
+    
+    Args:
+        company_slug: URL slug of the company
+        
+    Returns:
+        Dictionary of meta tags including OpenGraph, Twitter Cards, and canonical URL
+    """
+    company = get_object_or_404(
+        Company.objects.prefetch_related('company_types'),
+        slug=company_slug,
+        is_active=True
+    )
+    return SEOTags.for_company(company)
+
+
+@router.get('/meta/ride-model/{model_slug}')
+def get_ride_model_meta(request, model_slug: str):
+    """
+    Get SEO meta tags for a ride model page.
+    
+    Args:
+        model_slug: URL slug of the ride model
+        
+    Returns:
+        Dictionary of meta tags including OpenGraph, Twitter Cards, and canonical URL
+    """
+    model = get_object_or_404(
+        RideModel.objects.select_related(
+            'manufacturer',
+            'ride_type'
+        ),
+        slug=model_slug,
+        is_active=True
+    )
+    return SEOTags.for_ride_model(model)
+
+
+@router.get('/structured-data/park/{park_slug}')
+def get_park_structured_data(request, park_slug: str):
+    """
+    Get JSON-LD structured data for a park page.
+    
+    Args:
+        park_slug: URL slug of the park
+        
+    Returns:
+        JSON-LD structured data for search engines
+    """
+    park = get_object_or_404(
+        Park.objects.select_related('locality', 'country'),
+        slug=park_slug,
+        is_active=True
+    )
+    return SEOTags.structured_data_for_park(park)
+
+
+@router.get('/structured-data/ride/{park_slug}/{ride_slug}')
+def get_ride_structured_data(request, park_slug: str, ride_slug: str):
+    """
+    Get JSON-LD structured data for a ride page.
+    
+    Args:
+        park_slug: URL slug of the park
+        ride_slug: URL slug of the ride
+        
+    Returns:
+        JSON-LD structured data for search engines
+    """
+    ride = get_object_or_404(
+        Ride.objects.select_related(
+            'park',
+            'ride_type',
+            'manufacturer'
+        ),
+        slug=ride_slug,
+        park__slug=park_slug,
+        is_active=True
+    )
+    return SEOTags.structured_data_for_ride(ride)

django-backend/api/v1/endpoints/timeline.py

@@ -0,0 +1,339 @@
+"""
+Timeline API endpoints.
+
+Handles entity timeline events for tracking significant lifecycle events
+like openings, closings, relocations, etc.
+"""
+from typing import List
+from uuid import UUID
+from ninja import Router, Query
+from django.shortcuts import get_object_or_404
+from django.db.models import Q, Count, Min, Max
+
+from apps.timeline.models import EntityTimelineEvent
+from apps.entities.models import Park, Ride, Company, RideModel
+from apps.users.permissions import require_role
+from api.v1.schemas import (
+    EntityTimelineEventOut,
+    EntityTimelineEventCreate,
+    EntityTimelineEventUpdate,
+    EntityTimelineEventListOut,
+    TimelineStatsOut,
+    MessageSchema,
+    ErrorResponse,
+)
+
+
+router = Router(tags=["Timeline"])
+
+
+def get_entity_model(entity_type: str):
+    """Get the Django model class for an entity type."""
+    models = {
+        'park': Park,
+        'ride': Ride,
+        'company': Company,
+        'ridemodel': RideModel,
+    }
+    return models.get(entity_type.lower())
+
+
+def serialize_timeline_event(event: EntityTimelineEvent) -> dict:
+    """Serialize a timeline event to dict for output."""
+    return {
+        'id': event.id,
+        'entity_id': event.entity_id,
+        'entity_type': event.entity_type,
+        'event_type': event.event_type,
+        'event_date': event.event_date,
+        'event_date_precision': event.event_date_precision,
+        'title': event.title,
+        'description': event.description,
+        'from_entity_id': event.from_entity_id,
+        'to_entity_id': event.to_entity_id,
+        'from_location_id': event.from_location_id,
+        'from_location_name': event.from_location.name if event.from_location else None,
+        'to_location_id': event.to_location_id,
+        'to_location_name': event.to_location.name if event.to_location else None,
+        'from_value': event.from_value,
+        'to_value': event.to_value,
+        'is_public': event.is_public,
+        'display_order': event.display_order,
+        'created_by_id': event.created_by_id,
+        'created_by_email': event.created_by.email if event.created_by else None,
+        'approved_by_id': event.approved_by_id,
+        'approved_by_email': event.approved_by.email if event.approved_by else None,
+        'submission_id': event.submission_id,
+        'created_at': event.created_at,
+        'updated_at': event.updated_at,
+    }
+
+
+@router.get("/{entity_type}/{entity_id}/", response={200: List[EntityTimelineEventOut], 404: ErrorResponse})
+def get_entity_timeline(
+    request,
+    entity_type: str,
+    entity_id: UUID,
+    event_type: str = Query(None, description="Filter by event type"),
+    is_public: bool = Query(None, description="Filter by public/private"),
+    page: int = Query(1, ge=1),
+    page_size: int = Query(50, ge=1, le=100),
+):
+    """
+    Get timeline events for a specific entity.
+    
+    Returns a paginated list of timeline events for the specified entity.
+    Regular users only see public events; moderators see all events.
+    """
+    # Validate entity type
+    model = get_entity_model(entity_type)
+    if not model:
+        return 404, {'detail': f'Invalid entity type: {entity_type}'}
+    
+    # Verify entity exists
+    entity = get_object_or_404(model, id=entity_id)
+    
+    # Build query
+    queryset = EntityTimelineEvent.objects.filter(
+        entity_type=entity_type.lower(),
+        entity_id=entity_id
+    ).select_related('from_location', 'to_location', 'created_by', 'approved_by')
+    
+    # Filter by public status (non-moderators only see public events)
+    is_moderator = hasattr(request.user, 'role') and request.user.role in ['moderator', 'admin']
+    if not is_moderator:
+        queryset = queryset.filter(is_public=True)
+    
+    # Apply filters
+    if event_type:
+        queryset = queryset.filter(event_type=event_type)
+    if is_public is not None:
+        queryset = queryset.filter(is_public=is_public)
+    
+    # Order by date (newest first) and display order
+    queryset = queryset.order_by('-event_date', 'display_order', '-created_at')
+    
+    # Pagination
+    total = queryset.count()
+    start = (page - 1) * page_size
+    end = start + page_size
+    events = queryset[start:end]
+    
+    return 200, [serialize_timeline_event(event) for event in events]
+
+
+@router.get("/recent/", response={200: List[EntityTimelineEventOut]})
+def get_recent_timeline_events(
+    request,
+    entity_type: str = Query(None, description="Filter by entity type"),
+    event_type: str = Query(None, description="Filter by event type"),
+    limit: int = Query(20, ge=1, le=100),
+):
+    """
+    Get recent timeline events across all entities.
+    
+    Returns the most recent timeline events. Only public events are returned
+    for regular users; moderators see all events.
+    """
+    # Build query
+    queryset = EntityTimelineEvent.objects.all().select_related(
+        'from_location', 'to_location', 'created_by', 'approved_by'
+    )
+    
+    # Filter by public status
+    is_moderator = hasattr(request.user, 'role') and request.user.role in ['moderator', 'admin']
+    if not is_moderator:
+        queryset = queryset.filter(is_public=True)
+    
+    # Apply filters
+    if entity_type:
+        queryset = queryset.filter(entity_type=entity_type.lower())
+    if event_type:
+        queryset = queryset.filter(event_type=event_type)
+    
+    # Order by date and limit
+    queryset = queryset.order_by('-event_date', '-created_at')[:limit]
+    
+    return 200, [serialize_timeline_event(event) for event in queryset]
+
+
+@router.get("/stats/{entity_type}/{entity_id}/", response={200: TimelineStatsOut, 404: ErrorResponse})
+def get_timeline_stats(request, entity_type: str, entity_id: UUID):
+    """
+    Get statistics about timeline events for an entity.
+    """
+    # Validate entity type
+    model = get_entity_model(entity_type)
+    if not model:
+        return 404, {'detail': f'Invalid entity type: {entity_type}'}
+    
+    # Verify entity exists
+    entity = get_object_or_404(model, id=entity_id)
+    
+    # Build query
+    queryset = EntityTimelineEvent.objects.filter(
+        entity_type=entity_type.lower(),
+        entity_id=entity_id
+    )
+    
+    # Filter by public status if not moderator
+    is_moderator = hasattr(request.user, 'role') and request.user.role in ['moderator', 'admin']
+    if not is_moderator:
+        queryset = queryset.filter(is_public=True)
+    
+    # Get stats
+    total_events = queryset.count()
+    public_events = queryset.filter(is_public=True).count()
+    
+    # Event type distribution
+    event_types = dict(queryset.values('event_type').annotate(count=Count('id')).values_list('event_type', 'count'))
+    
+    # Date range
+    date_stats = queryset.aggregate(
+        earliest=Min('event_date'),
+        latest=Max('event_date')
+    )
+    
+    return 200, {
+        'total_events': total_events,
+        'public_events': public_events,
+        'event_types': event_types,
+        'earliest_event': date_stats['earliest'],
+        'latest_event': date_stats['latest'],
+    }
+
+
+@router.post("/", response={201: EntityTimelineEventOut, 400: ErrorResponse, 403: ErrorResponse})
+@require_role(['moderator', 'admin'])
+def create_timeline_event(request, data: EntityTimelineEventCreate):
+    """
+    Create a new timeline event (moderators only).
+    
+    Allows moderators to manually create timeline events for entities.
+    """
+    # Validate entity exists
+    model = get_entity_model(data.entity_type)
+    if not model:
+        return 400, {'detail': f'Invalid entity type: {data.entity_type}'}
+    
+    entity = get_object_or_404(model, id=data.entity_id)
+    
+    # Validate locations if provided
+    if data.from_location_id:
+        get_object_or_404(Park, id=data.from_location_id)
+    if data.to_location_id:
+        get_object_or_404(Park, id=data.to_location_id)
+    
+    # Create event
+    event = EntityTimelineEvent.objects.create(
+        entity_id=data.entity_id,
+        entity_type=data.entity_type.lower(),
+        event_type=data.event_type,
+        event_date=data.event_date,
+        event_date_precision=data.event_date_precision or 'day',
+        title=data.title,
+        description=data.description,
+        from_entity_id=data.from_entity_id,
+        to_entity_id=data.to_entity_id,
+        from_location_id=data.from_location_id,
+        to_location_id=data.to_location_id,
+        from_value=data.from_value,
+        to_value=data.to_value,
+        is_public=data.is_public,
+        display_order=data.display_order,
+        created_by=request.user,
+        approved_by=request.user,  # Moderator-created events are auto-approved
+    )
+    
+    return 201, serialize_timeline_event(event)
+
+
+@router.patch("/{event_id}/", response={200: EntityTimelineEventOut, 404: ErrorResponse, 403: ErrorResponse})
+@require_role(['moderator', 'admin'])
+def update_timeline_event(request, event_id: UUID, data: EntityTimelineEventUpdate):
+    """
+    Update a timeline event (moderators only).
+    """
+    event = get_object_or_404(EntityTimelineEvent, id=event_id)
+    
+    # Update fields if provided
+    update_fields = []
+    
+    if data.event_type is not None:
+        event.event_type = data.event_type
+        update_fields.append('event_type')
+    
+    if data.event_date is not None:
+        event.event_date = data.event_date
+        update_fields.append('event_date')
+    
+    if data.event_date_precision is not None:
+        event.event_date_precision = data.event_date_precision
+        update_fields.append('event_date_precision')
+    
+    if data.title is not None:
+        event.title = data.title
+        update_fields.append('title')
+    
+    if data.description is not None:
+        event.description = data.description
+        update_fields.append('description')
+    
+    if data.from_entity_id is not None:
+        event.from_entity_id = data.from_entity_id
+        update_fields.append('from_entity_id')
+    
+    if data.to_entity_id is not None:
+        event.to_entity_id = data.to_entity_id
+        update_fields.append('to_entity_id')
+    
+    if data.from_location_id is not None:
+        # Validate park exists
+        if data.from_location_id:
+            get_object_or_404(Park, id=data.from_location_id)
+        event.from_location_id = data.from_location_id
+        update_fields.append('from_location_id')
+    
+    if data.to_location_id is not None:
+        # Validate park exists
+        if data.to_location_id:
+            get_object_or_404(Park, id=data.to_location_id)
+        event.to_location_id = data.to_location_id
+        update_fields.append('to_location_id')
+    
+    if data.from_value is not None:
+        event.from_value = data.from_value
+        update_fields.append('from_value')
+    
+    if data.to_value is not None:
+        event.to_value = data.to_value
+        update_fields.append('to_value')
+    
+    if data.is_public is not None:
+        event.is_public = data.is_public
+        update_fields.append('is_public')
+    
+    if data.display_order is not None:
+        event.display_order = data.display_order
+        update_fields.append('display_order')
+    
+    if update_fields:
+        update_fields.append('updated_at')
+        event.save(update_fields=update_fields)
+    
+    return 200, serialize_timeline_event(event)
+
+
+@router.delete("/{event_id}/", response={200: MessageSchema, 404: ErrorResponse, 403: ErrorResponse})
+@require_role(['moderator', 'admin'])
+def delete_timeline_event(request, event_id: UUID):
+    """
+    Delete a timeline event (moderators only).
+    """
+    event = get_object_or_404(EntityTimelineEvent, id=event_id)
+    event.delete()
+    
+    return 200, {
+        'message': 'Timeline event deleted successfully',
+        'success': True
+    }

django-backend/api/v1/endpoints/top_lists.py

@@ -0,0 +1,574 @@
+"""
+Top List endpoints for API v1.
+
+Provides CRUD operations for user-created ranked lists.
+Users can create lists of parks, rides, or coasters with custom rankings and notes.
+"""
+from typing import List, Optional
+from uuid import UUID
+from django.shortcuts import get_object_or_404
+from django.db.models import Q, Max
+from django.contrib.contenttypes.models import ContentType
+from django.core.exceptions import ValidationError
+from django.db import transaction
+from ninja import Router, Query
+from ninja.pagination import paginate, PageNumberPagination
+import logging
+
+from apps.users.models import UserTopList, UserTopListItem, User
+from apps.entities.models import Park, Ride
+from apps.users.permissions import jwt_auth, require_auth
+from ..schemas import (
+    TopListCreateSchema,
+    TopListUpdateSchema,
+    TopListItemCreateSchema,
+    TopListItemUpdateSchema,
+    TopListOut,
+    TopListDetailOut,
+    TopListListOut,
+    TopListItemOut,
+    ErrorResponse,
+    UserSchema,
+)
+
+router = Router(tags=["Top Lists"])
+logger = logging.getLogger(__name__)
+
+
+class TopListPagination(PageNumberPagination):
+    """Custom pagination for top lists."""
+    page_size = 50
+
+
+def _get_entity(entity_type: str, entity_id: UUID):
+    """Helper to get and validate entity (Park or Ride)."""
+    if entity_type == 'park':
+        return get_object_or_404(Park, id=entity_id), ContentType.objects.get_for_model(Park)
+    elif entity_type == 'ride':
+        return get_object_or_404(Ride, id=entity_id), ContentType.objects.get_for_model(Ride)
+    else:
+        raise ValidationError(f"Invalid entity_type: {entity_type}")
+
+
+def _serialize_list_item(item: UserTopListItem) -> dict:
+    """Serialize top list item with computed fields."""
+    entity = item.content_object
+    
+    data = {
+        'id': item.id,
+        'position': item.position,
+        'entity_type': item.content_type.model,
+        'entity_id': str(item.object_id),
+        'entity_name': entity.name if entity else 'Unknown',
+        'entity_slug': entity.slug if entity and hasattr(entity, 'slug') else '',
+        'entity_image_url': None,  # TODO: Get from entity
+        'park_name': None,
+        'notes': item.notes or '',
+        'created': item.created,
+        'modified': item.modified,
+    }
+    
+    # If entity is a ride, add park name
+    if item.content_type.model == 'ride' and entity and hasattr(entity, 'park'):
+        data['park_name'] = entity.park.name if entity.park else None
+    
+    return data
+
+
+def _serialize_top_list(top_list: UserTopList, include_items: bool = False) -> dict:
+    """Serialize top list with optional items."""
+    data = {
+        'id': top_list.id,
+        'user': UserSchema(
+            id=top_list.user.id,
+            username=top_list.user.username,
+            display_name=top_list.user.display_name,
+            avatar_url=top_list.user.avatar_url,
+            reputation_score=top_list.user.reputation_score,
+        ),
+        'list_type': top_list.list_type,
+        'title': top_list.title,
+        'description': top_list.description or '',
+        'is_public': top_list.is_public,
+        'item_count': top_list.item_count,
+        'created': top_list.created,
+        'modified': top_list.modified,
+    }
+    
+    if include_items:
+        items = top_list.items.select_related('content_type').order_by('position')
+        data['items'] = [_serialize_list_item(item) for item in items]
+    
+    return data
+
+
+# ============================================================================
+# Main Top List CRUD Endpoints
+# ============================================================================
+
+@router.post("/", response={201: TopListOut, 400: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def create_top_list(request, data: TopListCreateSchema):
+    """
+    Create a new top list.
+    
+    **Authentication:** Required
+    
+    **Parameters:**
+    - list_type: "parks", "rides", or "coasters"
+    - title: List title
+    - description: List description (optional)
+    - is_public: Whether list is publicly visible (default: true)
+    
+    **Returns:** Created top list
+    """
+    try:
+        user = request.auth
+        
+        # Create list
+        top_list = UserTopList.objects.create(
+            user=user,
+            list_type=data.list_type,
+            title=data.title,
+            description=data.description or '',
+            is_public=data.is_public,
+        )
+        
+        logger.info(f"Top list created: {top_list.id} by {user.email}")
+        
+        list_data = _serialize_top_list(top_list)
+        return 201, list_data
+        
+    except Exception as e:
+        logger.error(f"Error creating top list: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.get("/", response={200: List[TopListOut]})
+@paginate(TopListPagination)
+def list_top_lists(
+    request,
+    list_type: Optional[str] = Query(None, description="Filter by list type"),
+    user_id: Optional[UUID] = Query(None, description="Filter by user ID"),
+    ordering: Optional[str] = Query("-created", description="Sort by field")
+):
+    """
+    List accessible top lists.
+    
+    **Authentication:** Optional
+    
+    **Filters:**
+    - list_type: parks, rides, or coasters
+    - user_id: Lists by specific user
+    - ordering: Sort field (default: -created)
+    
+    **Returns:** Paginated list of top lists
+    
+    **Note:** Shows public lists + user's own private lists if authenticated.
+    """
+    user = request.auth if hasattr(request, 'auth') else None
+    
+    # Base query
+    queryset = UserTopList.objects.select_related('user')
+    
+    # Apply visibility filter
+    if user:
+        # Show public lists + user's own lists
+        queryset = queryset.filter(Q(is_public=True) | Q(user=user))
+    else:
+        # Only public lists
+        queryset = queryset.filter(is_public=True)
+    
+    # Apply list type filter
+    if list_type:
+        queryset = queryset.filter(list_type=list_type)
+    
+    # Apply user filter
+    if user_id:
+        queryset = queryset.filter(user_id=user_id)
+    
+    # Apply ordering
+    valid_order_fields = ['created', 'modified', 'title']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    # Serialize lists
+    lists = [_serialize_top_list(tl) for tl in queryset]
+    return lists
+
+
+@router.get("/public", response={200: List[TopListOut]})
+@paginate(TopListPagination)
+def list_public_top_lists(
+    request,
+    list_type: Optional[str] = Query(None),
+    user_id: Optional[UUID] = Query(None),
+    ordering: Optional[str] = Query("-created")
+):
+    """
+    List public top lists.
+    
+    **Authentication:** Optional
+    
+    **Parameters:**
+    - list_type: Filter by type (optional)
+    - user_id: Filter by user (optional)
+    - ordering: Sort field (default: -created)
+    
+    **Returns:** Paginated list of public top lists
+    """
+    queryset = UserTopList.objects.filter(is_public=True).select_related('user')
+    
+    if list_type:
+        queryset = queryset.filter(list_type=list_type)
+    
+    if user_id:
+        queryset = queryset.filter(user_id=user_id)
+    
+    valid_order_fields = ['created', 'modified', 'title']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    lists = [_serialize_top_list(tl) for tl in queryset]
+    return lists
+
+
+@router.get("/{list_id}", response={200: TopListDetailOut, 403: ErrorResponse, 404: ErrorResponse})
+def get_top_list(request, list_id: UUID):
+    """
+    Get a specific top list with all items.
+    
+    **Authentication:** Optional
+    
+    **Parameters:**
+    - list_id: List UUID
+    
+    **Returns:** Top list with all items
+    
+    **Note:** Private lists only accessible to owner.
+    """
+    user = request.auth if hasattr(request, 'auth') else None
+    
+    top_list = get_object_or_404(
+        UserTopList.objects.select_related('user'),
+        id=list_id
+    )
+    
+    # Check access
+    if not top_list.is_public:
+        if not user or top_list.user != user:
+            return 403, {'detail': 'This list is private'}
+    
+    list_data = _serialize_top_list(top_list, include_items=True)
+    return 200, list_data
+
+
+@router.put("/{list_id}", response={200: TopListOut, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def update_top_list(request, list_id: UUID, data: TopListUpdateSchema):
+    """
+    Update a top list.
+    
+    **Authentication:** Required (must be list owner)
+    
+    **Parameters:**
+    - list_id: List UUID
+    - data: Fields to update
+    
+    **Returns:** Updated list
+    """
+    user = request.auth
+    
+    top_list = get_object_or_404(UserTopList, id=list_id)
+    
+    # Check ownership
+    if top_list.user != user:
+        return 403, {'detail': 'You can only update your own lists'}
+    
+    # Update fields
+    update_data = data.dict(exclude_unset=True)
+    for key, value in update_data.items():
+        setattr(top_list, key, value)
+    
+    top_list.save()
+    
+    logger.info(f"Top list updated: {top_list.id} by {user.email}")
+    
+    list_data = _serialize_top_list(top_list)
+    return 200, list_data
+
+
+@router.delete("/{list_id}", response={204: None, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def delete_top_list(request, list_id: UUID):
+    """
+    Delete a top list.
+    
+    **Authentication:** Required (must be list owner)
+    
+    **Parameters:**
+    - list_id: List UUID
+    
+    **Returns:** No content (204)
+    
+    **Note:** This also deletes all items in the list.
+    """
+    user = request.auth
+    
+    top_list = get_object_or_404(UserTopList, id=list_id)
+    
+    # Check ownership
+    if top_list.user != user:
+        return 403, {'detail': 'You can only delete your own lists'}
+    
+    logger.info(f"Top list deleted: {top_list.id} by {user.email}")
+    top_list.delete()
+    
+    return 204, None
+
+
+# ============================================================================
+# List Item Endpoints
+# ============================================================================
+
+@router.post("/{list_id}/items", response={201: TopListItemOut, 400: ErrorResponse, 403: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def add_list_item(request, list_id: UUID, data: TopListItemCreateSchema):
+    """
+    Add an item to a top list.
+    
+    **Authentication:** Required (must be list owner)
+    
+    **Parameters:**
+    - list_id: List UUID
+    - entity_type: "park" or "ride"
+    - entity_id: Entity UUID
+    - position: Position in list (optional, auto-assigned if not provided)
+    - notes: Notes about this item (optional)
+    
+    **Returns:** Created list item
+    """
+    try:
+        user = request.auth
+        
+        top_list = get_object_or_404(UserTopList, id=list_id)
+        
+        # Check ownership
+        if top_list.user != user:
+            return 403, {'detail': 'You can only modify your own lists'}
+        
+        # Validate entity
+        entity, content_type = _get_entity(data.entity_type, data.entity_id)
+        
+        # Validate entity type matches list type
+        if top_list.list_type == 'parks' and data.entity_type != 'park':
+            return 400, {'detail': 'Can only add parks to a parks list'}
+        elif top_list.list_type in ['rides', 'coasters']:
+            if data.entity_type != 'ride':
+                return 400, {'detail': f'Can only add rides to a {top_list.list_type} list'}
+            if top_list.list_type == 'coasters' and not entity.is_coaster:
+                return 400, {'detail': 'Can only add coasters to a coasters list'}
+        
+        # Determine position
+        if data.position is None:
+            # Auto-assign position (append to end)
+            max_pos = top_list.items.aggregate(max_pos=Max('position'))['max_pos']
+            position = (max_pos or 0) + 1
+        else:
+            position = data.position
+            # Check if position is taken
+            if top_list.items.filter(position=position).exists():
+                return 400, {'detail': f'Position {position} is already taken'}
+        
+        # Create item
+        with transaction.atomic():
+            item = UserTopListItem.objects.create(
+                top_list=top_list,
+                content_type=content_type,
+                object_id=entity.id,
+                position=position,
+                notes=data.notes or '',
+            )
+        
+        logger.info(f"List item added: {item.id} to list {list_id}")
+        
+        item_data = _serialize_list_item(item)
+        return 201, item_data
+        
+    except ValidationError as e:
+        return 400, {'detail': str(e)}
+    except Exception as e:
+        logger.error(f"Error adding list item: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.put("/{list_id}/items/{position}", response={200: TopListItemOut, 400: ErrorResponse, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def update_list_item(request, list_id: UUID, position: int, data: TopListItemUpdateSchema):
+    """
+    Update a list item.
+    
+    **Authentication:** Required (must be list owner)
+    
+    **Parameters:**
+    - list_id: List UUID
+    - position: Current position
+    - data: Fields to update (position, notes)
+    
+    **Returns:** Updated item
+    
+    **Note:** If changing position, items are reordered automatically.
+    """
+    try:
+        user = request.auth
+        
+        top_list = get_object_or_404(UserTopList, id=list_id)
+        
+        # Check ownership
+        if top_list.user != user:
+            return 403, {'detail': 'You can only modify your own lists'}
+        
+        # Get item
+        item = get_object_or_404(
+            UserTopListItem.objects.select_related('content_type'),
+            top_list=top_list,
+            position=position
+        )
+        
+        with transaction.atomic():
+            # Handle position change
+            if data.position is not None and data.position != position:
+                new_position = data.position
+                
+                # Check if new position exists
+                target_item = top_list.items.filter(position=new_position).first()
+                
+                if target_item:
+                    # Swap positions
+                    target_item.position = position
+                    target_item.save()
+                
+                item.position = new_position
+            
+            # Update notes if provided
+            if data.notes is not None:
+                item.notes = data.notes
+            
+            item.save()
+        
+        logger.info(f"List item updated: {item.id}")
+        
+        item_data = _serialize_list_item(item)
+        return 200, item_data
+        
+    except Exception as e:
+        logger.error(f"Error updating list item: {e}")
+        return 400, {'detail': str(e)}
+
+
+@router.delete("/{list_id}/items/{position}", response={204: None, 403: ErrorResponse, 404: ErrorResponse}, auth=jwt_auth)
+@require_auth
+def delete_list_item(request, list_id: UUID, position: int):
+    """
+    Remove an item from a list.
+    
+    **Authentication:** Required (must be list owner)
+    
+    **Parameters:**
+    - list_id: List UUID
+    - position: Position of item to remove
+    
+    **Returns:** No content (204)
+    
+    **Note:** Remaining items are automatically reordered.
+    """
+    user = request.auth
+    
+    top_list = get_object_or_404(UserTopList, id=list_id)
+    
+    # Check ownership
+    if top_list.user != user:
+        return 403, {'detail': 'You can only modify your own lists'}
+    
+    # Get item
+    item = get_object_or_404(
+        UserTopListItem,
+        top_list=top_list,
+        position=position
+    )
+    
+    with transaction.atomic():
+        # Delete item
+        item.delete()
+        
+        # Reorder remaining items
+        items_to_reorder = top_list.items.filter(position__gt=position).order_by('position')
+        for i, remaining_item in enumerate(items_to_reorder, start=position):
+            remaining_item.position = i
+            remaining_item.save()
+    
+    logger.info(f"List item deleted from list {list_id} at position {position}")
+    
+    return 204, None
+
+
+# ============================================================================
+# User-Specific Endpoints
+# ============================================================================
+
+@router.get("/users/{user_id}", response={200: List[TopListOut], 403: ErrorResponse})
+@paginate(TopListPagination)
+def get_user_top_lists(
+    request,
+    user_id: UUID,
+    list_type: Optional[str] = Query(None),
+    ordering: Optional[str] = Query("-created")
+):
+    """
+    Get a user's top lists.
+    
+    **Authentication:** Optional
+    
+    **Parameters:**
+    - user_id: User UUID
+    - list_type: Filter by type (optional)
+    - ordering: Sort field (default: -created)
+    
+    **Returns:** Paginated list of user's top lists
+    
+    **Note:** Only public lists visible unless viewing own lists.
+    """
+    target_user = get_object_or_404(User, id=user_id)
+    
+    # Check if current user
+    current_user = request.auth if hasattr(request, 'auth') else None
+    is_owner = current_user and current_user.id == target_user.id
+    
+    # Build query
+    queryset = UserTopList.objects.filter(user=target_user).select_related('user')
+    
+    # Apply visibility filter
+    if not is_owner:
+        queryset = queryset.filter(is_public=True)
+    
+    # Apply list type filter
+    if list_type:
+        queryset = queryset.filter(list_type=list_type)
+    
+    # Apply ordering
+    valid_order_fields = ['created', 'modified', 'title']
+    order_field = ordering.lstrip('-')
+    if order_field in valid_order_fields:
+        queryset = queryset.order_by(ordering)
+    else:
+        queryset = queryset.order_by('-created')
+    
+    # Serialize lists
+    lists = [_serialize_top_list(tl) for tl in queryset]
+    return lists

django-backend/api/v1/endpoints/versioning.py

@@ -0,0 +1,369 @@
+"""
+Versioning API endpoints for ThrillWiki.
+
+Provides REST API for:
+- Version history for entities
+- Specific version details
+- Comparing versions
+- Diff with current state
+- Version restoration (optional)
+"""
+
+from typing import List
+from uuid import UUID
+from django.shortcuts import get_object_or_404
+from django.http import Http404
+from ninja import Router
+
+from apps.entities.models import Park, Ride, Company, RideModel
+from apps.versioning.models import EntityVersion
+from apps.versioning.services import VersionService
+from api.v1.schemas import (
+    EntityVersionSchema,
+    VersionHistoryResponseSchema,
+    VersionDiffSchema,
+    VersionComparisonSchema,
+    ErrorSchema,
+    MessageSchema
+)
+
+router = Router(tags=['Versioning'])
+
+
+# Park Versions
+
+@router.get(
+    '/parks/{park_id}/versions',
+    response={200: VersionHistoryResponseSchema, 404: ErrorSchema},
+    summary="Get park version history"
+)
+def get_park_versions(request, park_id: UUID, limit: int = 50):
+    """
+    Get version history for a park.
+    
+    Returns up to `limit` versions in reverse chronological order (newest first).
+    """
+    park = get_object_or_404(Park, id=park_id)
+    versions = VersionService.get_version_history(park, limit=limit)
+    
+    return {
+        'entity_id': str(park.id),
+        'entity_type': 'park',
+        'entity_name': park.name,
+        'total_versions': VersionService.get_version_count(park),
+        'versions': [
+            EntityVersionSchema.from_orm(v) for v in versions
+        ]
+    }
+
+
+@router.get(
+    '/parks/{park_id}/versions/{version_number}',
+    response={200: EntityVersionSchema, 404: ErrorSchema},
+    summary="Get specific park version"
+)
+def get_park_version(request, park_id: UUID, version_number: int):
+    """Get a specific version of a park by version number."""
+    park = get_object_or_404(Park, id=park_id)
+    version = VersionService.get_version_by_number(park, version_number)
+    
+    if not version:
+        raise Http404("Version not found")
+    
+    return EntityVersionSchema.from_orm(version)
+
+
+@router.get(
+    '/parks/{park_id}/versions/{version_number}/diff',
+    response={200: VersionDiffSchema, 404: ErrorSchema},
+    summary="Compare park version with current"
+)
+def get_park_version_diff(request, park_id: UUID, version_number: int):
+    """
+    Compare a specific version with the current park state.
+    
+    Returns the differences between the version and current values.
+    """
+    park = get_object_or_404(Park, id=park_id)
+    version = VersionService.get_version_by_number(park, version_number)
+    
+    if not version:
+        raise Http404("Version not found")
+    
+    diff = VersionService.get_diff_with_current(version)
+    
+    return {
+        'entity_id': str(park.id),
+        'entity_type': 'park',
+        'entity_name': park.name,
+        'version_number': version.version_number,
+        'version_date': version.created,
+        'differences': diff['differences'],
+        'changed_field_count': diff['changed_field_count']
+    }
+
+
+# Ride Versions
+
+@router.get(
+    '/rides/{ride_id}/versions',
+    response={200: VersionHistoryResponseSchema, 404: ErrorSchema},
+    summary="Get ride version history"
+)
+def get_ride_versions(request, ride_id: UUID, limit: int = 50):
+    """Get version history for a ride."""
+    ride = get_object_or_404(Ride, id=ride_id)
+    versions = VersionService.get_version_history(ride, limit=limit)
+    
+    return {
+        'entity_id': str(ride.id),
+        'entity_type': 'ride',
+        'entity_name': ride.name,
+        'total_versions': VersionService.get_version_count(ride),
+        'versions': [
+            EntityVersionSchema.from_orm(v) for v in versions
+        ]
+    }
+
+
+@router.get(
+    '/rides/{ride_id}/versions/{version_number}',
+    response={200: EntityVersionSchema, 404: ErrorSchema},
+    summary="Get specific ride version"
+)
+def get_ride_version(request, ride_id: UUID, version_number: int):
+    """Get a specific version of a ride by version number."""
+    ride = get_object_or_404(Ride, id=ride_id)
+    version = VersionService.get_version_by_number(ride, version_number)
+    
+    if not version:
+        raise Http404("Version not found")
+    
+    return EntityVersionSchema.from_orm(version)
+
+
+@router.get(
+    '/rides/{ride_id}/versions/{version_number}/diff',
+    response={200: VersionDiffSchema, 404: ErrorSchema},
+    summary="Compare ride version with current"
+)
+def get_ride_version_diff(request, ride_id: UUID, version_number: int):
+    """Compare a specific version with the current ride state."""
+    ride = get_object_or_404(Ride, id=ride_id)
+    version = VersionService.get_version_by_number(ride, version_number)
+    
+    if not version:
+        raise Http404("Version not found")
+    
+    diff = VersionService.get_diff_with_current(version)
+    
+    return {
+        'entity_id': str(ride.id),
+        'entity_type': 'ride',
+        'entity_name': ride.name,
+        'version_number': version.version_number,
+        'version_date': version.created,
+        'differences': diff['differences'],
+        'changed_field_count': diff['changed_field_count']
+    }
+
+
+# Company Versions
+
+@router.get(
+    '/companies/{company_id}/versions',
+    response={200: VersionHistoryResponseSchema, 404: ErrorSchema},
+    summary="Get company version history"
+)
+def get_company_versions(request, company_id: UUID, limit: int = 50):
+    """Get version history for a company."""
+    company = get_object_or_404(Company, id=company_id)
+    versions = VersionService.get_version_history(company, limit=limit)
+    
+    return {
+        'entity_id': str(company.id),
+        'entity_type': 'company',
+        'entity_name': company.name,
+        'total_versions': VersionService.get_version_count(company),
+        'versions': [
+            EntityVersionSchema.from_orm(v) for v in versions
+        ]
+    }
+
+
+@router.get(
+    '/companies/{company_id}/versions/{version_number}',
+    response={200: EntityVersionSchema, 404: ErrorSchema},
+    summary="Get specific company version"
+)
+def get_company_version(request, company_id: UUID, version_number: int):
+    """Get a specific version of a company by version number."""
+    company = get_object_or_404(Company, id=company_id)
+    version = VersionService.get_version_by_number(company, version_number)
+    
+    if not version:
+        raise Http404("Version not found")
+    
+    return EntityVersionSchema.from_orm(version)
+
+
+@router.get(
+    '/companies/{company_id}/versions/{version_number}/diff',
+    response={200: VersionDiffSchema, 404: ErrorSchema},
+    summary="Compare company version with current"
+)
+def get_company_version_diff(request, company_id: UUID, version_number: int):
+    """Compare a specific version with the current company state."""
+    company = get_object_or_404(Company, id=company_id)
+    version = VersionService.get_version_by_number(company, version_number)
+    
+    if not version:
+        raise Http404("Version not found")
+    
+    diff = VersionService.get_diff_with_current(version)
+    
+    return {
+        'entity_id': str(company.id),
+        'entity_type': 'company',
+        'entity_name': company.name,
+        'version_number': version.version_number,
+        'version_date': version.created,
+        'differences': diff['differences'],
+        'changed_field_count': diff['changed_field_count']
+    }
+
+
+# Ride Model Versions
+
+@router.get(
+    '/ride-models/{model_id}/versions',
+    response={200: VersionHistoryResponseSchema, 404: ErrorSchema},
+    summary="Get ride model version history"
+)
+def get_ride_model_versions(request, model_id: UUID, limit: int = 50):
+    """Get version history for a ride model."""
+    model = get_object_or_404(RideModel, id=model_id)
+    versions = VersionService.get_version_history(model, limit=limit)
+    
+    return {
+        'entity_id': str(model.id),
+        'entity_type': 'ride_model',
+        'entity_name': str(model),
+        'total_versions': VersionService.get_version_count(model),
+        'versions': [
+            EntityVersionSchema.from_orm(v) for v in versions
+        ]
+    }
+
+
+@router.get(
+    '/ride-models/{model_id}/versions/{version_number}',
+    response={200: EntityVersionSchema, 404: ErrorSchema},
+    summary="Get specific ride model version"
+)
+def get_ride_model_version(request, model_id: UUID, version_number: int):
+    """Get a specific version of a ride model by version number."""
+    model = get_object_or_404(RideModel, id=model_id)
+    version = VersionService.get_version_by_number(model, version_number)
+    
+    if not version:
+        raise Http404("Version not found")
+    
+    return EntityVersionSchema.from_orm(version)
+
+
+@router.get(
+    '/ride-models/{model_id}/versions/{version_number}/diff',
+    response={200: VersionDiffSchema, 404: ErrorSchema},
+    summary="Compare ride model version with current"
+)
+def get_ride_model_version_diff(request, model_id: UUID, version_number: int):
+    """Compare a specific version with the current ride model state."""
+    model = get_object_or_404(RideModel, id=model_id)
+    version = VersionService.get_version_by_number(model, version_number)
+    
+    if not version:
+        raise Http404("Version not found")
+    
+    diff = VersionService.get_diff_with_current(version)
+    
+    return {
+        'entity_id': str(model.id),
+        'entity_type': 'ride_model',
+        'entity_name': str(model),
+        'version_number': version.version_number,
+        'version_date': version.created,
+        'differences': diff['differences'],
+        'changed_field_count': diff['changed_field_count']
+    }
+
+
+# Generic Version Endpoints
+
+@router.get(
+    '/versions/{version_id}',
+    response={200: EntityVersionSchema, 404: ErrorSchema},
+    summary="Get version by ID"
+)
+def get_version(request, version_id: UUID):
+    """Get a specific version by its ID."""
+    version = get_object_or_404(EntityVersion, id=version_id)
+    return EntityVersionSchema.from_orm(version)
+
+
+@router.get(
+    '/versions/{version_id}/compare/{other_version_id}',
+    response={200: VersionComparisonSchema, 404: ErrorSchema},
+    summary="Compare two versions"
+)
+def compare_versions(request, version_id: UUID, other_version_id: UUID):
+    """
+    Compare two versions of the same entity.
+    
+    Both versions must be for the same entity.
+    """
+    version1 = get_object_or_404(EntityVersion, id=version_id)
+    version2 = get_object_or_404(EntityVersion, id=other_version_id)
+    
+    comparison = VersionService.compare_versions(version1, version2)
+    
+    return {
+        'version1': EntityVersionSchema.from_orm(version1),
+        'version2': EntityVersionSchema.from_orm(version2),
+        'differences': comparison['differences'],
+        'changed_field_count': comparison['changed_field_count']
+    }
+
+
+# Optional: Version Restoration
+# Uncomment if you want to enable version restoration via API
+
+# @router.post(
+#     '/versions/{version_id}/restore',
+#     response={200: MessageSchema, 404: ErrorSchema},
+#     summary="Restore a version"
+# )
+# def restore_version(request, version_id: UUID):
+#     """
+#     Restore an entity to a previous version.
+#     
+#     This creates a new version with change_type='restored'.
+#     Requires authentication and appropriate permissions.
+#     """
+#     version = get_object_or_404(EntityVersion, id=version_id)
+#     
+#     # Check authentication
+#     if not request.user.is_authenticated:
+#         return 401, {'error': 'Authentication required'}
+#     
+#     # Restore version
+#     restored_version = VersionService.restore_version(
+#         version,
+#         user=request.user,
+#         comment='Restored via API'
+#     )
+#     
+#     return {
+#         'message': f'Successfully restored to version {version.version_number}',
+#         'new_version_number': restored_version.version_number
+#     }

django-backend/api/v1/services/__init__.py

@@ -0,0 +1,5 @@
+"""
+Service layer for API v1.
+
+Provides business logic separated from endpoint handlers.
+"""

django-backend/api/v1/services/history_service.py

@@ -0,0 +1,629 @@
+"""
+History service for pghistory Event models.
+
+Provides business logic for history queries, comparisons, and rollbacks
+using pghistory Event models (CompanyEvent, ParkEvent, RideEvent, etc.).
+"""
+
+from datetime import timedelta, date, datetime
+from typing import Optional, List, Dict, Any, Tuple
+from django.utils import timezone
+from django.db.models import QuerySet, Q
+from django.core.exceptions import PermissionDenied
+
+
+class HistoryService:
+    """
+    Service for managing entity history via pghistory Event models.
+    
+    Provides:
+    - History queries with role-based access control
+    - Event comparisons and diffs
+    - Rollback functionality
+    - Field-specific history tracking
+    """
+    
+    # Mapping of entity types to their pghistory Event model paths
+    EVENT_MODELS = {
+        'park': ('apps.entities.models', 'ParkEvent'),
+        'ride': ('apps.entities.models', 'RideEvent'),
+        'company': ('apps.entities.models', 'CompanyEvent'),
+        'ridemodel': ('apps.entities.models', 'RideModelEvent'),
+        'review': ('apps.reviews.models', 'ReviewEvent'),
+    }
+    
+    # Mapping of entity types to their main model paths
+    ENTITY_MODELS = {
+        'park': ('apps.entities.models', 'Park'),
+        'ride': ('apps.entities.models', 'Ride'),
+        'company': ('apps.entities.models', 'Company'),
+        'ridemodel': ('apps.entities.models', 'RideModel'),
+        'review': ('apps.reviews.models', 'Review'),
+    }
+    
+    @classmethod
+    def get_event_model(cls, entity_type: str):
+        """
+        Get the pghistory Event model class for an entity type.
+        
+        Args:
+            entity_type: Type of entity ('park', 'ride', 'company', 'ridemodel', 'review')
+            
+        Returns:
+            Event model class (e.g., ParkEvent)
+            
+        Raises:
+            ValueError: If entity type is unknown
+        """
+        entity_type_lower = entity_type.lower()
+        if entity_type_lower not in cls.EVENT_MODELS:
+            raise ValueError(f"Unknown entity type: {entity_type}")
+        
+        module_path, class_name = cls.EVENT_MODELS[entity_type_lower]
+        module = __import__(module_path, fromlist=[class_name])
+        return getattr(module, class_name)
+    
+    @classmethod
+    def get_entity_model(cls, entity_type: str):
+        """Get the main entity model class for an entity type."""
+        entity_type_lower = entity_type.lower()
+        if entity_type_lower not in cls.ENTITY_MODELS:
+            raise ValueError(f"Unknown entity type: {entity_type}")
+        
+        module_path, class_name = cls.ENTITY_MODELS[entity_type_lower]
+        module = __import__(module_path, fromlist=[class_name])
+        return getattr(module, class_name)
+    
+    @classmethod
+    def get_history(
+        cls,
+        entity_type: str,
+        entity_id: str,
+        user=None,
+        operation: Optional[str] = None,
+        date_from: Optional[date] = None,
+        date_to: Optional[date] = None,
+        field_changed: Optional[str] = None,
+        limit: int = 50,
+        offset: int = 0
+    ) -> Tuple[QuerySet, int]:
+        """
+        Get history for an entity with filtering and access control.
+        
+        Args:
+            entity_type: Type of entity
+            entity_id: UUID of the entity
+            user: User making the request (for access control)
+            operation: Filter by operation type ('INSERT' or 'UPDATE')
+            date_from: Filter events after this date
+            date_to: Filter events before this date
+            field_changed: Filter events that changed this field (requires comparison)
+            limit: Maximum number of events to return
+            offset: Number of events to skip (for pagination)
+            
+        Returns:
+            Tuple of (queryset, total_count)
+        """
+        EventModel = cls.get_event_model(entity_type)
+        
+        # Base queryset for this entity
+        queryset = EventModel.objects.filter(
+            pgh_obj_id=entity_id
+        ).order_by('-pgh_created_at')
+        
+        # Get total count before access control for informational purposes
+        total_count = queryset.count()
+        
+        # Apply access control (time-based filtering)
+        queryset = cls._apply_access_control(queryset, user)
+        accessible_count = queryset.count()
+        
+        # Apply additional filters
+        if date_from:
+            queryset = queryset.filter(pgh_created_at__gte=date_from)
+        
+        if date_to:
+            queryset = queryset.filter(pgh_created_at__lte=date_to)
+        
+        # Note: field_changed filtering requires comparing consecutive events
+        # This is expensive and should be done in the API layer if needed
+        
+        return queryset[offset:offset + limit], accessible_count
+    
+    @classmethod
+    def _apply_access_control(cls, queryset: QuerySet, user) -> QuerySet:
+        """
+        Apply time-based access control based on user role.
+        
+        Access Rules:
+        - Unauthenticated: Last 30 days
+        - Authenticated: Last 1 year
+        - Moderators/Admins/Superusers: Unlimited
+        
+        Args:
+            queryset: Base queryset to filter
+            user: User making the request
+            
+        Returns:
+            Filtered queryset
+        """
+        # Check for privileged users first
+        if user and user.is_authenticated:
+            # Superusers and staff get unlimited access
+            if user.is_superuser or user.is_staff:
+                return queryset
+            
+            # Check for moderator/admin role if role system exists
+            if hasattr(user, 'role') and user.role in ['moderator', 'admin']:
+                return queryset
+            
+            # Regular authenticated users: 1 year
+            cutoff = timezone.now() - timedelta(days=365)
+            return queryset.filter(pgh_created_at__gte=cutoff)
+        
+        # Unauthenticated users: 30 days
+        cutoff = timezone.now() - timedelta(days=30)
+        return queryset.filter(pgh_created_at__gte=cutoff)
+    
+    @classmethod
+    def get_access_reason(cls, user) -> str:
+        """Get human-readable description of access level."""
+        if user and user.is_authenticated:
+            if user.is_superuser or user.is_staff:
+                return "Full access (administrator)"
+            if hasattr(user, 'role') and user.role in ['moderator', 'admin']:
+                return "Full access (moderator)"
+            return "Limited to last 1 year (authenticated user)"
+        return "Limited to last 30 days (public access)"
+    
+    @classmethod
+    def is_access_limited(cls, user) -> bool:
+        """Check if user has limited access."""
+        if not user or not user.is_authenticated:
+            return True
+        if user.is_superuser or user.is_staff:
+            return False
+        if hasattr(user, 'role') and user.role in ['moderator', 'admin']:
+            return False
+        return True
+    
+    @classmethod
+    def get_event(
+        cls,
+        entity_type: str,
+        event_id: int,
+        user=None
+    ) -> Optional[Any]:
+        """
+        Get a specific event by ID with access control.
+        
+        Args:
+            entity_type: Type of entity
+            event_id: ID of the event (pgh_id)
+            user: User making the request
+            
+        Returns:
+            Event object or None if not found/not accessible
+        """
+        EventModel = cls.get_event_model(entity_type)
+        
+        try:
+            event = EventModel.objects.get(pgh_id=event_id)
+            
+            # Check if user has access to this event based on timestamp
+            queryset = EventModel.objects.filter(pgh_id=event_id)
+            if not cls._apply_access_control(queryset, user).exists():
+                return None  # User doesn't have access to this event
+            
+            return event
+        except EventModel.DoesNotExist:
+            return None
+    
+    @classmethod
+    def compare_events(
+        cls,
+        entity_type: str,
+        event_id1: int,
+        event_id2: int,
+        user=None
+    ) -> Dict[str, Any]:
+        """
+        Compare two historical events.
+        
+        Args:
+            entity_type: Type of entity
+            event_id1: ID of first event
+            event_id2: ID of second event
+            user: User making the request
+            
+        Returns:
+            Dictionary containing comparison results
+            
+        Raises:
+            ValueError: If events not found or not accessible
+        """
+        event1 = cls.get_event(entity_type, event_id1, user)
+        event2 = cls.get_event(entity_type, event_id2, user)
+        
+        if not event1 or not event2:
+            raise ValueError("One or both events not found or not accessible")
+        
+        # Ensure events are for the same entity
+        if event1.pgh_obj_id != event2.pgh_obj_id:
+            raise ValueError("Events must be for the same entity")
+        
+        # Compute differences
+        differences = cls._compute_differences(event1, event2)
+        
+        # Calculate time between events
+        time_delta = abs(event2.pgh_created_at - event1.pgh_created_at)
+        
+        return {
+            'event1': event1,
+            'event2': event2,
+            'differences': differences,
+            'changed_field_count': len(differences),
+            'unchanged_field_count': cls._get_field_count(event1) - len(differences),
+            'time_between': cls._format_timedelta(time_delta)
+        }
+    
+    @classmethod
+    def compare_with_current(
+        cls,
+        entity_type: str,
+        event_id: int,
+        entity,
+        user=None
+    ) -> Dict[str, Any]:
+        """
+        Compare historical event with current entity state.
+        
+        Args:
+            entity_type: Type of entity
+            event_id: ID of historical event
+            entity: Current entity instance
+            user: User making the request
+            
+        Returns:
+            Dictionary containing comparison results
+            
+        Raises:
+            ValueError: If event not found or not accessible
+        """
+        event = cls.get_event(entity_type, event_id, user)
+        if not event:
+            raise ValueError("Event not found or not accessible")
+        
+        # Ensure event is for this entity
+        if str(event.pgh_obj_id) != str(entity.id):
+            raise ValueError("Event is not for the specified entity")
+        
+        # Compute differences between historical and current
+        differences = {}
+        fields = cls._get_entity_fields(event)
+        
+        for field in fields:
+            historical_val = getattr(event, field, None)
+            current_val = getattr(entity, field, None)
+            
+            if historical_val != current_val:
+                differences[field] = {
+                    'historical_value': cls._serialize_value(historical_val),
+                    'current_value': cls._serialize_value(current_val),
+                    'changed': True
+                }
+        
+        # Calculate time since event
+        time_delta = timezone.now() - event.pgh_created_at
+        
+        return {
+            'event': event,
+            'current_state': entity,
+            'differences': differences,
+            'changed_field_count': len(differences),
+            'time_since': cls._format_timedelta(time_delta)
+        }
+    
+    @classmethod
+    def can_rollback(cls, user) -> bool:
+        """Check if user has permission to perform rollbacks."""
+        if not user or not user.is_authenticated:
+            return False
+        if user.is_superuser or user.is_staff:
+            return True
+        if hasattr(user, 'role') and user.role in ['moderator', 'admin']:
+            return True
+        return False
+    
+    @classmethod
+    def rollback_to_event(
+        cls,
+        entity,
+        entity_type: str,
+        event_id: int,
+        user,
+        fields: Optional[List[str]] = None,
+        comment: str = "",
+        create_backup: bool = True
+    ) -> Dict[str, Any]:
+        """
+        Rollback entity to a historical state.
+        
+        IMPORTANT: This modifies the entity and saves it!
+        
+        Args:
+            entity: Current entity instance
+            entity_type: Type of entity
+            event_id: ID of event to rollback to
+            user: User performing the rollback
+            fields: Optional list of specific fields to rollback (None = all fields)
+            comment: Optional comment explaining the rollback
+            create_backup: Whether to note the backup event ID
+            
+        Returns:
+            Dictionary containing rollback results
+            
+        Raises:
+            PermissionDenied: If user doesn't have rollback permission
+            ValueError: If event not found or invalid
+        """
+        # Permission check
+        if not cls.can_rollback(user):
+            raise PermissionDenied("Only moderators and administrators can perform rollbacks")
+        
+        event = cls.get_event(entity_type, event_id, user)
+        if not event:
+            raise ValueError("Event not found or not accessible")
+        
+        # Ensure event is for this entity
+        if str(event.pgh_obj_id) != str(entity.id):
+            raise ValueError("Event is not for the specified entity")
+        
+        # Track pre-rollback state for backup reference
+        backup_event_id = None
+        if create_backup:
+            # The current state will be captured automatically by pghistory
+            # when we save. We just need to note what the last event was.
+            EventModel = cls.get_event_model(entity_type)
+            last_event = EventModel.objects.filter(
+                pgh_obj_id=entity.id
+            ).order_by('-pgh_created_at').first()
+            if last_event:
+                backup_event_id = last_event.pgh_id
+        
+        # Determine which fields to rollback
+        if fields is None:
+            fields = cls._get_entity_fields(event)
+        
+        # Track changes
+        changes = {}
+        for field in fields:
+            if hasattr(entity, field) and hasattr(event, field):
+                old_val = getattr(entity, field)
+                new_val = getattr(event, field)
+                
+                if old_val != new_val:
+                    setattr(entity, field, new_val)
+                    changes[field] = {
+                        'from': cls._serialize_value(old_val),
+                        'to': cls._serialize_value(new_val)
+                    }
+        
+        # Save entity (pghistory will automatically create new event)
+        entity.save()
+        
+        # Get the new event that was just created
+        EventModel = cls.get_event_model(entity_type)
+        new_event = EventModel.objects.filter(
+            pgh_obj_id=entity.id
+        ).order_by('-pgh_created_at').first()
+        
+        return {
+            'success': True,
+            'message': f'Successfully rolled back {len(changes)} field(s) to state from {event.pgh_created_at.strftime("%Y-%m-%d")}',
+            'entity_id': str(entity.id),
+            'rollback_event_id': event_id,
+            'new_event_id': new_event.pgh_id if new_event else None,
+            'fields_changed': changes,
+            'backup_event_id': backup_event_id
+        }
+    
+    @classmethod
+    def get_field_history(
+        cls,
+        entity_type: str,
+        entity_id: str,
+        field_name: str,
+        user=None,
+        limit: int = 100
+    ) -> List[Dict[str, Any]]:
+        """
+        Get history of changes to a specific field.
+        
+        Args:
+            entity_type: Type of entity
+            entity_id: UUID of the entity
+            field_name: Name of the field to track
+            user: User making the request
+            limit: Maximum number of changes to return
+            
+        Returns:
+            List of field changes
+        """
+        events, _ = cls.get_history(entity_type, entity_id, user, limit=limit)
+        
+        field_history = []
+        previous_value = None
+        first_value = None
+        
+        # Iterate through events in reverse chronological order
+        for event in events:
+            if not hasattr(event, field_name):
+                continue
+            
+            current_value = getattr(event, field_name, None)
+            
+            # Track first (oldest) value
+            if first_value is None:
+                first_value = current_value
+            
+            # Detect changes
+            if previous_value is not None and current_value != previous_value:
+                field_history.append({
+                    'timestamp': event.pgh_created_at,
+                    'event_id': event.pgh_id,
+                    'old_value': cls._serialize_value(previous_value),
+                    'new_value': cls._serialize_value(current_value),
+                    'change_type': 'UPDATE'
+                })
+            elif previous_value is None:
+                # First event we're seeing (most recent)
+                field_history.append({
+                    'timestamp': event.pgh_created_at,
+                    'event_id': event.pgh_id,
+                    'old_value': None,
+                    'new_value': cls._serialize_value(current_value),
+                    'change_type': 'INSERT' if len(list(events)) == 1 else 'UPDATE'
+                })
+            
+            previous_value = current_value
+        
+        return {
+            'history': field_history,
+            'total_changes': len(field_history),
+            'first_value': cls._serialize_value(first_value),
+            'current_value': cls._serialize_value(previous_value) if previous_value is not None else None
+        }
+    
+    @classmethod
+    def get_activity_summary(
+        cls,
+        entity_type: str,
+        entity_id: str,
+        user=None
+    ) -> Dict[str, Any]:
+        """
+        Get activity summary for an entity.
+        
+        Args:
+            entity_type: Type of entity
+            entity_id: UUID of the entity
+            user: User making the request
+            
+        Returns:
+            Dictionary with activity statistics
+        """
+        EventModel = cls.get_event_model(entity_type)
+        now = timezone.now()
+        
+        # Get all events for this entity (respecting access control)
+        all_events = EventModel.objects.filter(pgh_obj_id=entity_id)
+        total_events = all_events.count()
+        
+        accessible_events = cls._apply_access_control(all_events, user)
+        accessible_count = accessible_events.count()
+        
+        # Time-based summaries
+        last_24h = accessible_events.filter(
+            pgh_created_at__gte=now - timedelta(days=1)
+        ).count()
+        
+        last_7d = accessible_events.filter(
+            pgh_created_at__gte=now - timedelta(days=7)
+        ).count()
+        
+        last_30d = accessible_events.filter(
+            pgh_created_at__gte=now - timedelta(days=30)
+        ).count()
+        
+        last_year = accessible_events.filter(
+            pgh_created_at__gte=now - timedelta(days=365)
+        ).count()
+        
+        # Get recent activity (last 10 events)
+        recent_activity = accessible_events.order_by('-pgh_created_at')[:10]
+        
+        return {
+            'total_events': total_events,
+            'accessible_events': accessible_count,
+            'summary': {
+                'last_24_hours': last_24h,
+                'last_7_days': last_7d,
+                'last_30_days': last_30d,
+                'last_year': last_year
+            },
+            'recent_activity': [
+                {
+                    'timestamp': event.pgh_created_at,
+                    'event_id': event.pgh_id,
+                    'operation': 'INSERT' if event == accessible_events.last() else 'UPDATE'
+                }
+                for event in recent_activity
+            ]
+        }
+    
+    # Helper methods
+    
+    @classmethod
+    def _compute_differences(cls, event1, event2) -> Dict[str, Any]:
+        """Compute differences between two events."""
+        differences = {}
+        fields = cls._get_entity_fields(event1)
+        
+        for field in fields:
+            val1 = getattr(event1, field, None)
+            val2 = getattr(event2, field, None)
+            
+            if val1 != val2:
+                differences[field] = {
+                    'event1_value': cls._serialize_value(val1),
+                    'event2_value': cls._serialize_value(val2)
+                }
+        
+        return differences
+    
+    @classmethod
+    def _get_entity_fields(cls, event) -> List[str]:
+        """Get list of entity field names (excluding pghistory fields)."""
+        return [
+            f.name for f in event._meta.fields
+            if not f.name.startswith('pgh_') and f.name not in ['id']
+        ]
+    
+    @classmethod
+    def _get_field_count(cls, event) -> int:
+        """Get count of entity fields."""
+        return len(cls._get_entity_fields(event))
+    
+    @classmethod
+    def _serialize_value(cls, value) -> Any:
+        """Serialize a value for JSON response."""
+        if value is None:
+            return None
+        if isinstance(value, (datetime, date)):
+            return value.isoformat()
+        if hasattr(value, 'id'):  # Foreign key
+            return str(value.id)
+        return value
+    
+    @classmethod
+    def _format_timedelta(cls, delta: timedelta) -> str:
+        """Format a timedelta as human-readable string."""
+        days = delta.days
+        if days == 0:
+            hours = delta.seconds // 3600
+            if hours == 0:
+                minutes = delta.seconds // 60
+                return f"{minutes} minute{'s' if minutes != 1 else ''}"
+            return f"{hours} hour{'s' if hours != 1 else ''}"
+        elif days < 30:
+            return f"{days} day{'s' if days != 1 else ''}"
+        elif days < 365:
+            months = days // 30
+            return f"{months} month{'s' if months != 1 else ''}"
+        else:
+            years = days // 365
+            months = (days % 365) // 30
+            if months > 0:
+                return f"{years} year{'s' if years != 1 else ''}, {months} month{'s' if months != 1 else ''}"
+            return f"{years} year{'s' if years != 1 else ''}"