Fix: Stabilize ModerationQueue data fetching

src/components/moderation/ModerationQueue.tsx

@@ -105,6 +105,10 @@ export const ModerationQueue = forwardRef<ModerationQueueRef>((props, ref) => {
   const itemsRef = useRef<ModerationItem[]>([]);
   const loadedIdsRef = useRef<Set<string>>(new Set());
   const realtimeUpdateDebounceRef = useRef<Map<string, NodeJS.Timeout>>(new Map());
+  const lastFetchTimeRef = useRef<number>(0);
+  const isMountingRef = useRef(true);
+  const initialFetchCompleteRef = useRef(false);
+  const FETCH_COOLDOWN_MS = 1000;
 
   // Get admin settings for polling configuration
   const { 
@@ -169,7 +173,16 @@ export const ModerationQueue = forwardRef<ModerationQueueRef>((props, ref) => {
       return;
     }
 
+    // Cooldown check - prevent rapid-fire calls
+    const now = Date.now();
+    const timeSinceLastFetch = now - lastFetchTimeRef.current;
+    if (timeSinceLastFetch < FETCH_COOLDOWN_MS && lastFetchTimeRef.current > 0) {
+      console.log(`⏸️ Fetch cooldown active (${timeSinceLastFetch}ms since last fetch), skipping`);
+      return;
+    }
+
     fetchInProgressRef.current = true;
+    lastFetchTimeRef.current = now;
 
     console.log('🔍 fetchItems called:', {
       entityFilter,
@@ -610,9 +623,13 @@ export const ModerationQueue = forwardRef<ModerationQueueRef>((props, ref) => {
   // Expose refresh method via ref
   useImperativeHandle(ref, () => ({
     refresh: () => {
-      fetchItems(filtersRef.current.entityFilter, filtersRef.current.statusFilter, false); // Manual refresh shows loading
+      if (isMountingRef.current) {
+        console.log('⏭️ Ignoring refresh during mount phase');
+        return;
+      }
+      fetchItems(filtersRef.current.entityFilter, filtersRef.current.statusFilter, false);
     }
-  }), [fetchItems]);
+  }), []);
 
   // Track if initial fetch has happened
   const hasInitialFetchRef = useRef(false);
@@ -641,14 +658,27 @@ export const ModerationQueue = forwardRef<ModerationQueueRef>((props, ref) => {
   useEffect(() => {
     if (!user) return;
     
+    // Phase 1: Initial fetch (run once)
     if (!hasInitialFetchRef.current) {
       hasInitialFetchRef.current = true;
-      fetchItems(debouncedEntityFilter, debouncedStatusFilter, false);
-    } else {
+      isMountingRef.current = true;
+      
+      fetchItems(debouncedEntityFilter, debouncedStatusFilter, false)
+        .then(() => {
+          initialFetchCompleteRef.current = true;
+          // Wait for DOM to paint before allowing subsequent fetches
+          requestAnimationFrame(() => {
+            isMountingRef.current = false;
+          });
+        });
+      return; // Exit early, don't respond to filter changes yet
+    }
+    
+    // Phase 2: Filter changes (only after initial fetch completes)
+    if (!isMountingRef.current && initialFetchCompleteRef.current) {
       debouncedFetchItems(debouncedEntityFilter, debouncedStatusFilter, true, activeTab);
     }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [debouncedEntityFilter, debouncedStatusFilter, user, activeTab]);
+  }, [debouncedEntityFilter, debouncedStatusFilter, user, activeTab, fetchItems, debouncedFetchItems]);
 
   // Polling for auto-refresh (only if realtime is disabled)
   useEffect(() => {
@@ -1678,7 +1708,8 @@ export const ModerationQueue = forwardRef<ModerationQueueRef>((props, ref) => {
   }, []);
 
   const QueueContent = () => {
-    if (isInitialLoad && loading) {
+    // Show skeleton during initial load OR during mounting phase
+    if ((isInitialLoad && loading) || (isMountingRef.current && !initialFetchCompleteRef.current)) {
       return <QueueSkeleton count={5} />;
     }