fix(catalog): prevent unnecessary list reloads on map movement

- Remove currentMapBounds from watch - it changes on every map move
- Watch only filterByBounds and urlBounds (URL-based state)
- Add early return in setBoundsFilter if bounds haven't changed

This fixes the issue where the list was reloading on every map movement
even when the 'filter by bounds' checkbox was OFF.

app/pages/catalog/index.vue

@@ -237,11 +237,10 @@ watch(productId, (newProductId) => {
 }, { immediate: true })
 
 // Apply bounds filter when "filter by map bounds" is enabled
-// Use URL bounds if available, otherwise use current map bounds
-watch([filterByBounds, urlBounds, currentMapBounds], ([enabled, urlB, mapB]) => {
-  // Use URL bounds if available, otherwise current map bounds
-  const bounds = urlB || mapB
-  const boundsToApply = enabled && bounds ? bounds : null
+// Only watch URL bounds - currentMapBounds changes too often (every map move)
+watch([filterByBounds, urlBounds], ([enabled, urlB]) => {
+  // Apply bounds filter only when checkbox is ON and bounds are in URL
+  const boundsToApply = enabled && urlB ? urlB : null
   setHubBoundsFilter(boundsToApply)
   setSupplierBoundsFilter(boundsToApply)
   setProductBoundsFilter(boundsToApply)