Add email templates for user notifications and account management

- Created a base email template (base.html) for consistent styling across all emails.
- Added moderation approval email template (moderation_approved.html) to notify users of approved submissions.
- Added moderation rejection email template (moderation_rejected.html) to inform users of required changes for their submissions.
- Created password reset email template (password_reset.html) for users requesting to reset their passwords.
- Developed a welcome email template (welcome.html) to greet new users and provide account details and tips for using ThrillWiki.

django/apps/entities/migrations/0002_alter_park_latitude_alter_park_longitude.py

@@ -0,0 +1,35 @@
+# Generated by Django 4.2.8 on 2025-11-08 17:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("entities", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="park",
+            name="latitude",
+            field=models.DecimalField(
+                blank=True,
+                decimal_places=7,
+                help_text="Latitude coordinate. Primary in local dev, use location_point in production.",
+                max_digits=10,
+                null=True,
+            ),
+        ),
+        migrations.AlterField(
+            model_name="park",
+            name="longitude",
+            field=models.DecimalField(
+                blank=True,
+                decimal_places=7,
+                help_text="Longitude coordinate. Primary in local dev, use location_point in production.",
+                max_digits=10,
+                null=True,
+            ),
+        ),
+    ]

django/apps/entities/migrations/0003_add_search_vector_gin_indexes.py

@@ -0,0 +1,141 @@
+# Generated migration for Phase 2 - GIN Index Optimization
+from django.db import migrations, connection
+from django.contrib.postgres.indexes import GinIndex
+from django.contrib.postgres.search import SearchVector
+
+
+def is_postgresql():
+    """Check if the database backend is PostgreSQL/PostGIS."""
+    return 'postgis' in connection.vendor or 'postgresql' in connection.vendor
+
+
+def populate_search_vectors(apps, schema_editor):
+    """Populate search_vector fields for all existing records."""
+    if not is_postgresql():
+        return
+    
+    # Get models
+    Company = apps.get_model('entities', 'Company')
+    RideModel = apps.get_model('entities', 'RideModel')
+    Park = apps.get_model('entities', 'Park')
+    Ride = apps.get_model('entities', 'Ride')
+    
+    # Update Company search vectors
+    Company.objects.update(
+        search_vector=(
+            SearchVector('name', weight='A') + 
+            SearchVector('description', weight='B')
+        )
+    )
+    
+    # Update RideModel search vectors
+    RideModel.objects.update(
+        search_vector=(
+            SearchVector('name', weight='A') +
+            SearchVector('manufacturer__name', weight='A') +
+            SearchVector('description', weight='B')
+        )
+    )
+    
+    # Update Park search vectors
+    Park.objects.update(
+        search_vector=(
+            SearchVector('name', weight='A') +
+            SearchVector('description', weight='B')
+        )
+    )
+    
+    # Update Ride search vectors
+    Ride.objects.update(
+        search_vector=(
+            SearchVector('name', weight='A') +
+            SearchVector('park__name', weight='A') +
+            SearchVector('manufacturer__name', weight='B') +
+            SearchVector('description', weight='B')
+        )
+    )
+
+
+def reverse_search_vectors(apps, schema_editor):
+    """Clear search_vector fields for all records."""
+    if not is_postgresql():
+        return
+    
+    # Get models
+    Company = apps.get_model('entities', 'Company')
+    RideModel = apps.get_model('entities', 'RideModel')
+    Park = apps.get_model('entities', 'Park')
+    Ride = apps.get_model('entities', 'Ride')
+    
+    # Clear all search vectors
+    Company.objects.update(search_vector=None)
+    RideModel.objects.update(search_vector=None)
+    Park.objects.update(search_vector=None)
+    Ride.objects.update(search_vector=None)
+
+
+def add_gin_indexes(apps, schema_editor):
+    """Add GIN indexes on search_vector fields (PostgreSQL only)."""
+    if not is_postgresql():
+        return
+    
+    # Use raw SQL to add GIN indexes
+    with schema_editor.connection.cursor() as cursor:
+        cursor.execute("""
+            CREATE INDEX IF NOT EXISTS entities_company_search_idx 
+            ON entities_company USING gin(search_vector);
+        """)
+        cursor.execute("""
+            CREATE INDEX IF NOT EXISTS entities_ridemodel_search_idx 
+            ON entities_ridemodel USING gin(search_vector);
+        """)
+        cursor.execute("""
+            CREATE INDEX IF NOT EXISTS entities_park_search_idx 
+            ON entities_park USING gin(search_vector);
+        """)
+        cursor.execute("""
+            CREATE INDEX IF NOT EXISTS entities_ride_search_idx 
+            ON entities_ride USING gin(search_vector);
+        """)
+
+
+def remove_gin_indexes(apps, schema_editor):
+    """Remove GIN indexes (PostgreSQL only)."""
+    if not is_postgresql():
+        return
+    
+    # Use raw SQL to drop GIN indexes
+    with schema_editor.connection.cursor() as cursor:
+        cursor.execute("DROP INDEX IF EXISTS entities_company_search_idx;")
+        cursor.execute("DROP INDEX IF EXISTS entities_ridemodel_search_idx;")
+        cursor.execute("DROP INDEX IF EXISTS entities_park_search_idx;")
+        cursor.execute("DROP INDEX IF EXISTS entities_ride_search_idx;")
+
+
+class Migration(migrations.Migration):
+    """
+    Phase 2 Migration: Add GIN indexes for search optimization.
+    
+    This migration:
+    1. Adds GIN indexes on search_vector fields for optimal full-text search
+    2. Populates search vectors for all existing database records
+    3. Is PostgreSQL-specific and safe for SQLite environments
+    """
+    
+    dependencies = [
+        ('entities', '0002_alter_park_latitude_alter_park_longitude'),
+    ]
+    
+    operations = [
+        # First, populate search vectors for existing records
+        migrations.RunPython(
+            populate_search_vectors,
+            reverse_search_vectors,
+        ),
+        
+        # Add GIN indexes for each model's search_vector field
+        migrations.RunPython(
+            add_gin_indexes,
+            remove_gin_indexes,
+        ),
+    ]