diff --git a/src/App.tsx b/src/App.tsx
index dc2162a4..74e0b669 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -98,12 +98,12 @@ if (import.meta.env.DEV) {
     const cache = queryClient.getQueryCache();
     const queries = cache.getAll();
     
-    // Remove oldest queries if cache exceeds 150 items
-    if (queries.length > 150) {
+    // Remove oldest queries if cache exceeds 250 items (increased limit)
+    if (queries.length > 250) {
       const sortedByLastUpdated = queries
         .sort((a, b) => (a.state.dataUpdatedAt || 0) - (b.state.dataUpdatedAt || 0));
       
-      const toRemove = sortedByLastUpdated.slice(0, queries.length - 100);
+      const toRemove = sortedByLastUpdated.slice(0, queries.length - 200);
       toRemove.forEach(query => {
         queryClient.removeQueries({ queryKey: query.queryKey });
       });
diff --git a/src/components/moderation/ReportButton.tsx b/src/components/moderation/ReportButton.tsx
index ce273404..8e45b772 100644
--- a/src/components/moderation/ReportButton.tsx
+++ b/src/components/moderation/ReportButton.tsx
@@ -19,11 +19,8 @@ import {
 } from '@/components/ui/select';
 import { Textarea } from '@/components/ui/textarea';
 import { Label } from '@/components/ui/label';
-import { supabase } from '@/integrations/supabase/client';
 import { useAuth } from '@/hooks/useAuth';
-import { useToast } from '@/hooks/use-toast';
-import { getErrorMessage } from '@/lib/errorHandler';
-import { useQueryInvalidation } from '@/lib/queryInvalidation';
+import { useReportMutation } from '@/hooks/reports/useReportMutation';
 
 interface ReportButtonProps {
   entityType: 'review' | 'profile' | 'content_submission';
@@ -43,49 +40,23 @@ export function ReportButton({ entityType, entityId, className }: ReportButtonPr
   const [open, setOpen] = useState(false);
   const [reportType, setReportType] = useState('');
   const [reason, setReason] = useState('');
-  const [loading, setLoading] = useState(false);
   const { user } = useAuth();
-  const { toast } = useToast();
   
-  // Cache invalidation for moderation queue
-  const { invalidateModerationQueue, invalidateModerationStats } = useQueryInvalidation();
+  const reportMutation = useReportMutation();
 
-  const handleSubmit = async () => {
+  const handleSubmit = () => {
     if (!user || !reportType) return;
 
-    setLoading(true);
-    try {
-      const { error } = await supabase.from('reports').insert({
-        reporter_id: user.id,
-        reported_entity_type: entityType,
-        reported_entity_id: entityId,
-        report_type: reportType,
-        reason: reason.trim() || null,
-      });
-
-      if (error) throw error;
-
-      // Invalidate moderation caches
-      invalidateModerationQueue();
-      invalidateModerationStats();
-
-      toast({
-        title: "Report Submitted",
-        description: "Thank you for your report. We'll review it shortly.",
-      });
-
-      setOpen(false);
-      setReportType('');
-      setReason('');
-    } catch (error: unknown) {
-      toast({
-        title: "Error",
-        description: getErrorMessage(error),
-        variant: "destructive",
-      });
-    } finally {
-      setLoading(false);
-    }
+    reportMutation.mutate(
+      { entityType, entityId, reportType, reason },
+      {
+        onSuccess: () => {
+          setOpen(false);
+          setReportType('');
+          setReason('');
+        },
+      }
+    );
   };
 
   if (!user) return null;
@@ -144,10 +115,10 @@ export function ReportButton({ entityType, entityId, className }: ReportButtonPr
           </Button>
           <Button
             onClick={handleSubmit}
-            disabled={!reportType || loading}
+            disabled={!reportType || reportMutation.isPending}
             variant="destructive"
           >
-            {loading ? 'Submitting...' : 'Submit Report'}
+            {reportMutation.isPending ? 'Submitting...' : 'Submit Report'}
           </Button>
         </DialogFooter>
       </DialogContent>
diff --git a/src/components/parks/ParkCard.tsx b/src/components/parks/ParkCard.tsx
index 6118b597..4a42ee8b 100644
--- a/src/components/parks/ParkCard.tsx
+++ b/src/components/parks/ParkCard.tsx
@@ -19,36 +19,42 @@ export function ParkCard({ park }: ParkCardProps) {
     navigate(`/parks/${park.slug}`);
   };
   
-  // Prefetch park detail data on hover
+  // Smart prefetch - only if not already cached
   const handleMouseEnter = () => {
-    // Prefetch park detail page data
-    queryClient.prefetchQuery({
-      queryKey: queryKeys.parks.detail(park.slug),
-      queryFn: async () => {
-        const { data } = await supabase
-          .from('parks')
-          .select('*')
-          .eq('slug', park.slug)
-          .single();
-        return data;
-      },
-      staleTime: 5 * 60 * 1000,
-    });
+    // Check if already cached before prefetching
+    const detailCached = queryClient.getQueryData(queryKeys.parks.detail(park.slug));
+    const photosCached = queryClient.getQueryData(queryKeys.photos.entity('park', park.id));
     
-    // Prefetch park photos (first 10)
-    queryClient.prefetchQuery({
-      queryKey: queryKeys.photos.entity('park', park.id),
-      queryFn: async () => {
-        const { data } = await supabase
-          .from('photos')
-          .select('*')
-          .eq('entity_type', 'park')
-          .eq('entity_id', park.id)
-          .limit(10);
-        return data;
-      },
-      staleTime: 5 * 60 * 1000,
-    });
+    if (!detailCached) {
+      queryClient.prefetchQuery({
+        queryKey: queryKeys.parks.detail(park.slug),
+        queryFn: async () => {
+          const { data } = await supabase
+            .from('parks')
+            .select('*')
+            .eq('slug', park.slug)
+            .single();
+          return data;
+        },
+        staleTime: 5 * 60 * 1000,
+      });
+    }
+    
+    if (!photosCached) {
+      queryClient.prefetchQuery({
+        queryKey: queryKeys.photos.entity('park', park.id),
+        queryFn: async () => {
+          const { data } = await supabase
+            .from('photos')
+            .select('*')
+            .eq('entity_type', 'park')
+            .eq('entity_id', park.id)
+            .limit(10);
+          return data;
+        },
+        staleTime: 5 * 60 * 1000,
+      });
+    }
   };
   const getStatusColor = (status: string) => {
     switch (status) {
diff --git a/src/docs/API_PATTERNS.md b/src/docs/API_PATTERNS.md
new file mode 100644
index 00000000..0689ca41
--- /dev/null
+++ b/src/docs/API_PATTERNS.md
@@ -0,0 +1,173 @@
+# API and Cache Patterns
+
+## Mutation Pattern (PREFERRED)
+
+Always use `useMutation` hooks for data modifications instead of direct Supabase calls.
+
+### ✅ CORRECT Pattern
+
+```typescript
+import { useMutation, useQueryClient } from '@tanstack/react-query';
+import { supabase } from '@/integrations/supabase/client';
+import { toast } from 'sonner';
+import { getErrorMessage } from '@/lib/errorHandler';
+import { useQueryInvalidation } from '@/lib/queryInvalidation';
+
+export function useMyMutation() {
+  const queryClient = useQueryClient();
+  const { invalidateRelatedCache } = useQueryInvalidation();
+
+  return useMutation({
+    mutationFn: async (params) => {
+      const { error } = await supabase
+        .from('table')
+        .insert(params);
+      
+      if (error) throw error;
+    },
+    onMutate: async (params) => {
+      // Optional: Optimistic updates
+      await queryClient.cancelQueries({ queryKey: ['my-data'] });
+      const previous = queryClient.getQueryData(['my-data']);
+      
+      queryClient.setQueryData(['my-data'], (old) => {
+        // Update optimistically
+      });
+      
+      return { previous };
+    },
+    onError: (error, variables, context) => {
+      // Rollback optimistic updates
+      if (context?.previous) {
+        queryClient.setQueryData(['my-data'], context.previous);
+      }
+      
+      toast.error("Error", {
+        description: getErrorMessage(error),
+      });
+    },
+    onSuccess: () => {
+      invalidateRelatedCache();
+      toast.success("Success", {
+        description: "Operation completed successfully.",
+      });
+    },
+  });
+}
+```
+
+### ❌ INCORRECT Pattern (Direct Supabase)
+
+```typescript
+// DON'T DO THIS
+const handleSubmit = async () => {
+  try {
+    const { error } = await supabase.from('table').insert(data);
+    if (error) throw error;
+    toast.success('Success');
+  } catch (error) {
+    toast.error(error.message);
+  }
+};
+```
+
+## Error Handling Pattern
+
+### ✅ CORRECT: Use onError callback
+
+```typescript
+const mutation = useMutation({
+  mutationFn: async (data) => {
+    const { error } = await supabase.from('table').insert(data);
+    if (error) throw error;
+  },
+  onError: (error: unknown) => {
+    toast.error("Error", {
+      description: getErrorMessage(error),
+    });
+  },
+});
+```
+
+### ❌ INCORRECT: try/catch in component
+
+```typescript
+// Avoid this pattern
+const handleSubmit = async () => {
+  try {
+    await mutation.mutateAsync(data);
+  } catch (error) {
+    // Error already handled in mutation
+  }
+};
+```
+
+## Query Keys Pattern
+
+### ✅ CORRECT: Use centralized queryKeys
+
+```typescript
+import { queryKeys } from '@/lib/queryKeys';
+
+const { data } = useQuery({
+  queryKey: queryKeys.parks.detail(slug),
+  queryFn: fetchParkDetail,
+});
+```
+
+### ❌ INCORRECT: Inline query keys
+
+```typescript
+// Don't do this
+const { data } = useQuery({
+  queryKey: ['parks', 'detail', slug],
+  queryFn: fetchParkDetail,
+});
+```
+
+## Cache Invalidation Pattern
+
+### ✅ CORRECT: Use invalidation helpers
+
+```typescript
+import { useQueryInvalidation } from '@/lib/queryInvalidation';
+
+const { invalidateParks, invalidateHomepageData } = useQueryInvalidation();
+
+// In mutation onSuccess:
+onSuccess: () => {
+  invalidateParks();
+  invalidateHomepageData('parks');
+}
+```
+
+### ❌ INCORRECT: Manual invalidation
+
+```typescript
+// Avoid this
+queryClient.invalidateQueries({ queryKey: ['parks'] });
+```
+
+## Benefits of This Pattern
+
+1. **Automatic retry logic**: Failed mutations can be retried automatically
+2. **Loading states**: `isPending` flag for UI feedback
+3. **Optimistic updates**: Update UI before server confirms
+4. **Consistent error handling**: Centralized error handling
+5. **Cache coordination**: Proper invalidation timing
+6. **Testing**: Easier to mock and test
+7. **Type safety**: Better TypeScript support
+
+## Migration Checklist
+
+When migrating a component:
+
+- [ ] Create custom mutation hook in appropriate directory
+- [ ] Use `useMutation` instead of direct Supabase calls
+- [ ] Implement `onError` callback with toast notifications
+- [ ] Implement `onSuccess` callback with cache invalidation
+- [ ] Use centralized `queryKeys` for query identification
+- [ ] Use `useQueryInvalidation` helpers for cache management
+- [ ] Replace loading state with `mutation.isPending`
+- [ ] Remove try/catch blocks from component
+- [ ] Test optimistic updates if applicable
diff --git a/src/hooks/profile/useProfileUpdateMutation.ts b/src/hooks/profile/useProfileUpdateMutation.ts
new file mode 100644
index 00000000..f58afc4a
--- /dev/null
+++ b/src/hooks/profile/useProfileUpdateMutation.ts
@@ -0,0 +1,77 @@
+import { useMutation, useQueryClient } from '@tanstack/react-query';
+import { supabase } from '@/integrations/supabase/client';
+import { toast } from 'sonner';
+import { getErrorMessage } from '@/lib/errorHandler';
+import { useQueryInvalidation } from '@/lib/queryInvalidation';
+
+interface ProfileUpdateParams {
+  userId: string;
+  updates: {
+    display_name?: string;
+    bio?: string;
+    location_id?: string | null;
+    website?: string | null;
+    [key: string]: any;
+  };
+}
+
+export function useProfileUpdateMutation() {
+  const queryClient = useQueryClient();
+  const { 
+    invalidateUserProfile, 
+    invalidateProfileStats, 
+    invalidateProfileActivity,
+    invalidateUserSearch 
+  } = useQueryInvalidation();
+
+  return useMutation({
+    mutationFn: async ({ userId, updates }: ProfileUpdateParams) => {
+      const { error } = await supabase
+        .from('profiles')
+        .update(updates)
+        .eq('user_id', userId);
+
+      if (error) throw error;
+    },
+    onMutate: async ({ userId, updates }) => {
+      // Cancel outgoing refetches
+      await queryClient.cancelQueries({ queryKey: ['profile', userId] });
+
+      // Snapshot previous value
+      const previousProfile = queryClient.getQueryData(['profile', userId]);
+
+      // Optimistically update
+      queryClient.setQueryData(['profile', userId], (old: any) => ({
+        ...old,
+        ...updates,
+      }));
+
+      return { previousProfile, userId };
+    },
+    onError: (error: unknown, _variables, context) => {
+      // Rollback on error
+      if (context?.previousProfile) {
+        queryClient.setQueryData(['profile', context.userId], context.previousProfile);
+      }
+      
+      toast.error("Update Failed", {
+        description: getErrorMessage(error),
+      });
+    },
+    onSuccess: (_data, { userId, updates }) => {
+      // Invalidate all related caches
+      invalidateUserProfile(userId);
+      invalidateProfileStats(userId);
+      invalidateProfileActivity(userId);
+      
+      // If display name changed, invalidate user search results
+      if (updates.display_name) {
+        invalidateUserSearch();
+      }
+      
+      toast.success("Profile Updated", {
+        description: "Your changes have been saved.",
+      });
+    },
+  });
+}
diff --git a/src/hooks/reports/useReportMutation.ts b/src/hooks/reports/useReportMutation.ts
new file mode 100644
index 00000000..aca796a2
--- /dev/null
+++ b/src/hooks/reports/useReportMutation.ts
@@ -0,0 +1,48 @@
+import { useMutation, useQueryClient } from '@tanstack/react-query';
+import { supabase } from '@/integrations/supabase/client';
+import { useAuth } from '@/hooks/useAuth';
+import { toast } from 'sonner';
+import { getErrorMessage } from '@/lib/errorHandler';
+import { useQueryInvalidation } from '@/lib/queryInvalidation';
+
+interface ReportParams {
+  entityType: 'review' | 'profile' | 'content_submission';
+  entityId: string;
+  reportType: string;
+  reason?: string;
+}
+
+export function useReportMutation() {
+  const { user } = useAuth();
+  const queryClient = useQueryClient();
+  const { invalidateModerationQueue, invalidateModerationStats } = useQueryInvalidation();
+
+  return useMutation({
+    mutationFn: async ({ entityType, entityId, reportType, reason }: ReportParams) => {
+      if (!user) throw new Error('Authentication required');
+
+      const { error } = await supabase.from('reports').insert({
+        reporter_id: user.id,
+        reported_entity_type: entityType,
+        reported_entity_id: entityId,
+        report_type: reportType,
+        reason: reason?.trim() || null,
+      });
+
+      if (error) throw error;
+    },
+    onSuccess: () => {
+      invalidateModerationQueue();
+      invalidateModerationStats();
+      
+      toast.success("Report Submitted", {
+        description: "Thank you for your report. We'll review it shortly.",
+      });
+    },
+    onError: (error: unknown) => {
+      toast.error("Error", {
+        description: getErrorMessage(error),
+      });
+    },
+  });
+}
diff --git a/src/lib/queryInvalidation.ts b/src/lib/queryInvalidation.ts
index 2125fcc4..c97b15b3 100644
--- a/src/lib/queryInvalidation.ts
+++ b/src/lib/queryInvalidation.ts
@@ -95,6 +95,70 @@ export function useQueryInvalidation() {
       }
     },
 
+    /**
+     * Invalidate user profile cache
+     * Call this after profile updates
+     */
+    invalidateUserProfile: (userId: string) => {
+      queryClient.invalidateQueries({ queryKey: queryKeys.profile.detail(userId) });
+    },
+
+    /**
+     * Invalidate profile stats cache
+     * Call this after profile-related changes
+     */
+    invalidateProfileStats: (userId: string) => {
+      queryClient.invalidateQueries({ queryKey: queryKeys.profile.stats(userId) });
+    },
+
+    /**
+     * Invalidate profile activity cache
+     * Call this after activity changes
+     */
+    invalidateProfileActivity: (userId: string) => {
+      queryClient.invalidateQueries({ queryKey: ['profile', 'activity', userId] });
+    },
+
+    /**
+     * Invalidate user search results
+     * Call this when display names change
+     */
+    invalidateUserSearch: () => {
+      queryClient.invalidateQueries({ queryKey: ['users', 'search'] });
+    },
+
+    /**
+     * Invalidate admin settings cache
+     * Call this after updating admin settings
+     */
+    invalidateAdminSettings: () => {
+      queryClient.invalidateQueries({ queryKey: queryKeys.admin.settings() });
+    },
+
+    /**
+     * Invalidate audit logs cache
+     * Call this after inserting audit log entries
+     */
+    invalidateAuditLogs: (userId?: string) => {
+      queryClient.invalidateQueries({ queryKey: queryKeys.admin.auditLogs(userId) });
+    },
+
+    /**
+     * Invalidate contact submissions cache
+     * Call this after updating contact submissions
+     */
+    invalidateContactSubmissions: () => {
+      queryClient.invalidateQueries({ queryKey: ['admin-contact-submissions'] });
+    },
+
+    /**
+     * Invalidate blog posts cache
+     * Call this after creating/updating/deleting blog posts
+     */
+    invalidateBlogPosts: () => {
+      queryClient.invalidateQueries({ queryKey: queryKeys.admin.blogPosts() });
+    },
+
     /**
      * Invalidate parks listing cache
      * Call this after creating/updating/deleting parks
@@ -211,22 +275,6 @@ export function useQueryInvalidation() {
       queryClient.invalidateQueries({ queryKey: ['companies', 'parks', id, type] });
     },
     
-    /**
-     * Invalidate profile activity cache
-     * Call this after user activity changes
-     */
-    invalidateProfileActivity: (userId: string) => {
-      queryClient.invalidateQueries({ queryKey: ['profile', 'activity', userId] });
-    },
-    
-    /**
-     * Invalidate profile stats cache
-     * Call this after user stats changes
-     */
-    invalidateProfileStats: (userId: string) => {
-      queryClient.invalidateQueries({ queryKey: queryKeys.profile.stats(userId) });
-    },
-    
     /**
      * Invalidate ride model detail cache
      * Call this after updating a ride model
@@ -324,14 +372,5 @@ export function useQueryInvalidation() {
         queryKey: queryKeys.entities.name(entityType, entityId) 
       });
     },
-    
-    /**
-     * Invalidate user profile cache
-     */
-    invalidateUserProfile: (userId: string) => {
-      queryClient.invalidateQueries({ 
-        queryKey: ['profiles', userId] 
-      });
-    },
   };
 }
diff --git a/src/lib/queryKeys.ts b/src/lib/queryKeys.ts
index 66a21190..291164d4 100644
--- a/src/lib/queryKeys.ts
+++ b/src/lib/queryKeys.ts
@@ -88,6 +88,11 @@ export const queryKeys = {
   // Admin queries
   admin: {
     versionAudit: ['admin', 'version-audit'] as const,
+    settings: () => ['admin-settings'] as const,
+    blogPosts: () => ['admin-blog-posts'] as const,
+    contactSubmissions: (statusFilter?: string, categoryFilter?: string, searchQuery?: string, showArchived?: boolean) => 
+      ['admin-contact-submissions', statusFilter, categoryFilter, searchQuery, showArchived] as const,
+    auditLogs: (userId?: string) => ['admin', 'audit-logs', userId] as const,
   },
   
   // Moderation queries