Implement cache invalidation improvements

src/components/dev/CacheMonitor.tsx

@@ -1,11 +1,17 @@
-import { useState, useEffect } from 'react';
-import { useQueryClient } from '@tanstack/react-query';
+import { useState, useEffect, useRef } from 'react';
+import { useQueryClient, QueryCache } from '@tanstack/react-query';
+
+interface InvalidationEvent {
+  timestamp: number;
+  queryKey: readonly unknown[];
+  reason: string;
+}
 
 /**
  * CacheMonitor Component (Dev Only)
  * 
  * Real-time cache performance monitoring for development.
- * Displays total queries, stale queries, fetching queries, and cache size.
+ * Displays total queries, stale queries, fetching queries, cache size, and invalidations.
  * Only renders in development mode.
  */
 export function CacheMonitor() {
@@ -16,7 +22,10 @@ export function CacheMonitor() {
     fetchingQueries: 0,
     cacheSize: 0,
   });
+  const [recentInvalidations, setRecentInvalidations] = useState<InvalidationEvent[]>([]);
+  const invalidationsRef = useRef<InvalidationEvent[]>([]);
   
+  // Monitor cache stats
   useEffect(() => {
     const interval = setInterval(() => {
       const cache = queryClient.getQueryCache();
@@ -28,22 +37,85 @@ export function CacheMonitor() {
         fetchingQueries: queries.filter(q => q.state.fetchStatus === 'fetching').length,
         cacheSize: JSON.stringify(queries).length,
       });
+      
+      // Update invalidations display
+      setRecentInvalidations([...invalidationsRef.current]);
     }, 1000);
     
     return () => clearInterval(interval);
   }, [queryClient]);
   
+  // Track invalidations
+  useEffect(() => {
+    const cache = queryClient.getQueryCache();
+    
+    const unsubscribe = cache.subscribe((event) => {
+      if (event?.type === 'removed' || event?.type === 'updated') {
+        const query = event.query;
+        if (query && query.state.fetchStatus === 'idle' && query.isStale()) {
+          const invalidation: InvalidationEvent = {
+            timestamp: Date.now(),
+            queryKey: query.queryKey,
+            reason: event.type,
+          };
+          
+          invalidationsRef.current = [invalidation, ...invalidationsRef.current].slice(0, 5);
+        }
+      }
+    });
+    
+    return () => unsubscribe();
+  }, [queryClient]);
+  
   if (!import.meta.env.DEV) return null;
   
+  const formatQueryKey = (key: readonly unknown[]): string => {
+    return JSON.stringify(key).slice(0, 40) + '...';
+  };
+  
+  const formatTime = (timestamp: number): string => {
+    const diff = Date.now() - timestamp;
+    if (diff < 1000) return 'just now';
+    if (diff < 60000) return `${Math.floor(diff / 1000)}s ago`;
+    return `${Math.floor(diff / 60000)}m ago`;
+  };
+  
   return (
-    <div className="fixed bottom-4 right-4 bg-black/80 text-white p-4 rounded-lg text-xs font-mono z-50 shadow-xl">
-      <h3 className="font-bold mb-2 text-primary">Cache Monitor</h3>
-      <div className="space-y-1">
-        <div>Total Queries: <span className="text-green-400">{stats.totalQueries}</span></div>
-        <div>Stale: <span className="text-yellow-400">{stats.staleQueries}</span></div>
-        <div>Fetching: <span className="text-blue-400">{stats.fetchingQueries}</span></div>
-        <div>Size: <span className="text-purple-400">{(stats.cacheSize / 1024).toFixed(1)} KB</span></div>
+    <div className="fixed bottom-4 right-4 bg-black/90 text-white p-4 rounded-lg text-xs font-mono z-50 shadow-xl max-w-sm">
+      <h3 className="font-bold mb-3 text-primary border-b border-primary/30 pb-2">Cache Monitor</h3>
+      
+      <div className="space-y-1 mb-3 pb-3 border-b border-white/10">
+        <div className="flex justify-between">
+          <span>Total Queries:</span>
+          <span className="text-green-400 font-bold">{stats.totalQueries}</span>
+        </div>
+        <div className="flex justify-between">
+          <span>Stale:</span>
+          <span className="text-yellow-400 font-bold">{stats.staleQueries}</span>
+        </div>
+        <div className="flex justify-between">
+          <span>Fetching:</span>
+          <span className="text-blue-400 font-bold">{stats.fetchingQueries}</span>
+        </div>
+        <div className="flex justify-between">
+          <span>Size:</span>
+          <span className="text-purple-400 font-bold">{(stats.cacheSize / 1024).toFixed(1)} KB</span>
+        </div>
       </div>
+      
+      {recentInvalidations.length > 0 && (
+        <div>
+          <h4 className="font-bold mb-2 text-accent">Recent Invalidations</h4>
+          <div className="space-y-1 max-h-32 overflow-y-auto">
+            {recentInvalidations.map((inv, i) => (
+              <div key={i} className="text-[10px] opacity-80 border-l-2 border-accent/50 pl-2">
+                <div className="text-muted-foreground">{formatTime(inv.timestamp)}</div>
+                <div className="truncate">{formatQueryKey(inv.queryKey)}</div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
     </div>
   );
 }

src/components/reviews/ReviewForm.tsx

@@ -17,6 +17,8 @@ import { StarRating } from './StarRating';
 import { toDateOnly } from '@/lib/dateUtils';
 import { getErrorMessage } from '@/lib/errorHandler';
 import { logger } from '@/lib/logger';
+import { useQueryInvalidation } from '@/lib/queryInvalidation';
+
 const reviewSchema = z.object({
   rating: z.number().min(0.5).max(5).multipleOf(0.5),
   title: z.string().optional(),
@@ -41,6 +43,7 @@ export function ReviewForm({
   const {
     user
   } = useAuth();
+  const { invalidateEntityReviews } = useQueryInvalidation();
   const [rating, setRating] = useState(0);
   const [submitting, setSubmitting] = useState(false);
   const [photos, setPhotos] = useState<string[]>([]);
@@ -118,6 +121,10 @@ export function ReviewForm({
         title: "Review Submitted!",
         description: "Thank you for your review. It will be published after moderation."
       });
+      
+      // Invalidate review cache for instant UI update
+      invalidateEntityReviews(entityType, entityId);
+      
       reset();
       setRating(0);
       setPhotos([]);

src/hooks/useAvatarUpload.ts

@@ -1,6 +1,8 @@
 import { useState, useCallback } from 'react';
 import { supabase } from '@/integrations/supabase/client';
 import { handleError, handleSuccess } from '@/lib/errorHandler';
+import { useQueryInvalidation } from '@/lib/queryInvalidation';
+import { useAuth } from '@/hooks/useAuth';
 
 export type AvatarUploadState = {
   url: string;
@@ -13,6 +15,8 @@ export const useAvatarUpload = (
   initialImageId: string = '',
   username: string
 ) => {
+  const { user } = useAuth();
+  const { invalidateUserProfile } = useQueryInvalidation();
   const [state, setState] = useState<AvatarUploadState>({
     url: initialUrl,
     imageId: initialImageId,
@@ -48,6 +52,11 @@ export const useAvatarUpload = (
       setState(prev => ({ ...prev, isUploading: false }));
       handleSuccess('Avatar updated', 'Your avatar has been successfully updated.');
       
+      // Invalidate user profile cache for instant UI update
+      if (user?.id) {
+        invalidateUserProfile(user.id);
+      }
+      
       return { success: true };
     } catch (error: unknown) {
       // Rollback on error
@@ -64,7 +73,7 @@ export const useAvatarUpload = (
       
       return { success: false, error };
     }
-  }, [username, initialUrl, initialImageId]);
+  }, [username, initialUrl, initialImageId, user?.id, invalidateUserProfile]);
 
   const resetAvatar = useCallback(() => {
     setState({

src/lib/queryInvalidation.ts

@@ -324,5 +324,14 @@ export function useQueryInvalidation() {
         queryKey: queryKeys.entities.name(entityType, entityId) 
       });
     },
+    
+    /**
+     * Invalidate user profile cache
+     */
+    invalidateUserProfile: (userId: string) => {
+      queryClient.invalidateQueries({ 
+        queryKey: ['profiles', userId] 
+      });
+    },
   };
 }

src/pages/BlogPost.tsx

@@ -13,9 +13,11 @@ import { Header } from '@/components/layout/Header';
 import { Footer } from '@/components/layout/Footer';
 import { useDocumentTitle } from '@/hooks/useDocumentTitle';
 import { useOpenGraph } from '@/hooks/useOpenGraph';
+import { useQueryInvalidation } from '@/lib/queryInvalidation';
 
 export default function BlogPost() {
   const { slug } = useParams<{ slug: string }>();
+  const { invalidateBlogPost } = useQueryInvalidation();
 
   const { data: post, isLoading } = useBlogPost(slug);
   
@@ -34,9 +36,12 @@ export default function BlogPost() {
 
   useEffect(() => {
     if (slug) {
-      supabase.rpc('increment_blog_view_count', { post_slug: slug });
+      supabase.rpc('increment_blog_view_count', { post_slug: slug }).then(() => {
+        // Invalidate blog post cache to update view count
+        invalidateBlogPost(slug);
+      });
     }
-  }, [slug]);
+  }, [slug, invalidateBlogPost]);
 
   if (isLoading) {
     return (