Several map editor improvements

src/components/gameMaster/zoneEditor/zonePartials/ZoneTiles.vue

@@ -191,7 +191,19 @@ onMounted(() => {
   if (!zoneEditorStore.zone?.tiles) {
     return
   }
-  setLayerTiles(tileMap, tileLayer, zoneEditorStore.zone.tiles)
+
+  // First fill the entire map with blank tiles
+  const blankTiles = createTileArray(tileMap.width, tileMap.height, 'blank_tile')
+
+  // Then overlay the zone tiles on top
+  const zoneTiles = zoneEditorStore.zone.tiles
+  for (let y = 0; y < zoneTiles.length; y++) {
+    for (let x = 0; x < zoneTiles[y].length; x++) {
+      blankTiles[y][x] = zoneTiles[y][x]
+    }
+  }
+
+  setLayerTiles(tileMap, tileLayer, blankTiles)
 
   scene.input.on(Phaser.Input.Events.POINTER_MOVE, pencil)
   scene.input.on(Phaser.Input.Events.POINTER_MOVE, eraser)