Fix filter changes not triggering refetch

- Add mainFilters/subFilters arrays to usePostsEngine
- Update filterKey to use full arrays for comparison
- Any filter toggle now triggers fresh API fetch

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/Map/MapView.jsx

@@ -507,7 +507,9 @@ export default function MapView({
       mapRef,
       viewParams,
       mainFilter,
+      mainFilters,
       subFilter,
+      subFilters,
       contentFilter,
       timeHours,
       searchQuery,

src/components/Map/usePostsEngine.js

@@ -373,7 +373,9 @@ export function usePostsEngine({
   mapRef,
   viewParams,
   mainFilter,
+  mainFilters = [], // Full array for cache key comparison
   subFilter,
+  subFilters = [], // Full array for cache key comparison
   contentFilter = "all",
   timeHours,
   searchQuery,
@@ -1018,7 +1020,10 @@ export function usePostsEngine({
 
       const [lng, lat] = resolvedView.center;
       const radiusKm = resolvedView.radiusKm || 750;
-      const filterKey = `${mainFilter}|${subFilter}`;
+      // Include full arrays in filterKey so any toggle triggers refetch
+      const mainKey = mainFilters.length > 0 ? mainFilters.sort().join(",") : mainFilter;
+      const subKey = subFilters.length > 0 ? subFilters.sort().join(",") : subFilter;
+      const filterKey = `${mainKey}|${subKey}|${contentFilter}`;
       const currentKey = `${filterKey}|${timeHours}`;
       const reqId = ++requestSeqRef.current;
       let bounds = null;
@@ -1218,7 +1223,8 @@ export function usePostsEngine({
         delayedFetchRef.current = null;
       }
     };
-  }, [viewParams, mapReady, mainFilter, subFilter, contentFilter, mapRef, timeHours, expandedElRef, refreshVisibleAndMarkers, computeVisible, onAutoWidenTimeFilter, syncMarkers, username]);
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [viewParams, mapReady, mainFilter, JSON.stringify(mainFilters), subFilter, JSON.stringify(subFilters), contentFilter, mapRef, timeHours, expandedElRef, refreshVisibleAndMarkers, computeVisible, onAutoWidenTimeFilter, syncMarkers, username]);
 
   useEffect(() => {
     const q = (searchQuery || "").trim();