fix(bulk): node-safe toast (globalThis.window) + common-tags test matches non-empty spec guard

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/stores/gallerySelection.js

@@ -51,7 +51,7 @@ export const useGallerySelectionStore = defineStore('gallerySelection', () => {
       body: { image_ids: order.value, tag_id: tagId, source }
     })
     await refresh()
-    window.__fcToast?.({
+    globalThis.window?.__fcToast?.({
       text: `Added to ${body.added_count} image(s)`, type: 'success'
     })
     return body
@@ -62,7 +62,7 @@ export const useGallerySelectionStore = defineStore('gallerySelection', () => {
       body: { image_ids: order.value, tag_id: tagId }
     })
     await refresh()
-    window.__fcToast?.({
+    globalThis.window?.__fcToast?.({
       text: `Removed from ${body.removed_count} image(s)`, type: 'success'
     })
     return body