Auto-scope selection to current map bounds

app/pages/catalog/index.vue

@@ -100,6 +100,7 @@ const catalogPageRef = ref<{ currentBounds: Ref<MapBounds | null> } | null>(null
 
 // Current map bounds (local state, updated when map moves)
 const currentMapBounds = ref<MapBounds | null>(null)
+const selectionBoundsBackup = ref<{ hadBounds: boolean; bounds: { west: number; south: number; east: number; north: number } | null } | null>(null)
 
 // Hovered item for map highlight
 const hoveredItemId = ref<string | null>(null)
@@ -235,8 +236,43 @@ const onLoadMore = () => {
   if (selectMode.value === 'supplier') loadMoreSuppliers()
 }
 
+const getSelectionBounds = () => {
+  const bounds = currentMapBounds.value ?? catalogPageRef.value?.currentBounds?.value ?? null
+  if (!bounds) return null
+  return { west: bounds.west, south: bounds.south, east: bounds.east, north: bounds.north }
+}
+
+const applySelectionBounds = () => {
+  if (!selectionBoundsBackup.value) {
+    selectionBoundsBackup.value = {
+      hadBounds: !!urlBounds.value,
+      bounds: urlBounds.value
+    }
+  }
+  const bounds = getSelectionBounds()
+  if (bounds) {
+    setBoundsInUrl(bounds)
+  }
+}
+
+const restoreSelectionBounds = () => {
+  const prev = selectionBoundsBackup.value
+  if (!prev) return
+  if (prev.hadBounds && prev.bounds) {
+    setBoundsInUrl(prev.bounds)
+  } else {
+    clearBoundsFromUrl()
+  }
+  selectionBoundsBackup.value = null
+}
+
 // Initialize data and sync map view when selectMode changes
 watch(selectMode, async (mode) => {
+  if (mode) {
+    applySelectionBounds()
+  } else {
+    restoreSelectionBounds()
+  }
   if (mode === 'product') {
     await initProducts()
     setMapViewMode('offers')