fix(frontend): sync sidebar pause menu with per-worker background task state

Only require a worker to be paused if it currently has pending work for
that folder, instead of demanding all four worker flags be true. The
background tasks panel only lets you toggle stages it shows, so the old
check stayed out of sync after pausing everything visible.

Also grants start-dragging and start-resize-dragging window permissions.

src/components/sidebar/FolderItem.tsx

@@ -39,14 +39,28 @@ export function FolderItem({
   const mutedFolderIds = useGalleryStore((state) => state.mutedFolderIds)
   const setAllWorkersPaused = useGalleryStore((state) => state.setAllWorkersPaused)
   const folderWorkers = useGalleryStore((state) => state.workerPaused[folder.id])
+  const folderJobs = useGalleryStore((state) => state.mediaJobProgress[folder.id])
   const isMuted = mutedFolderIds.includes(folder.id)
-  // "Fully paused" only when every worker for this folder is paused.
-  const isPausedAll =
-    !!folderWorkers &&
-    folderWorkers.thumbnail &&
-    folderWorkers.metadata &&
-    folderWorkers.embedding &&
-    folderWorkers.tagging
+  // "Fully paused" means every worker that currently has pending work is
+  // paused. Workers with nothing pending are ignored — the background tasks
+  // panel only lets you toggle the stages it actually shows, so requiring
+  // every worker key to be literally true left this permanently out of sync
+  // (menu kept offering "Pause" after the visible work was already paused).
+  const hasPendingWork =
+    (folderJobs?.thumbnail_pending ?? 0) > 0 ||
+    (folderJobs?.metadata_pending ?? 0) > 0 ||
+    (folderJobs?.embedding_pending ?? 0) > 0 ||
+    (folderJobs?.tagging_pending ?? 0) > 0
+  const isPausedAll = hasPendingWork
+    ? ((folderJobs?.thumbnail_pending ?? 0) === 0 || !!folderWorkers?.thumbnail) &&
+      ((folderJobs?.metadata_pending ?? 0) === 0 || !!folderWorkers?.metadata) &&
+      ((folderJobs?.embedding_pending ?? 0) === 0 || !!folderWorkers?.embedding) &&
+      ((folderJobs?.tagging_pending ?? 0) === 0 || !!folderWorkers?.tagging)
+    : !!folderWorkers &&
+      folderWorkers.thumbnail &&
+      folderWorkers.metadata &&
+      folderWorkers.embedding &&
+      folderWorkers.tagging
   const isIndexing = progress && !progress.done
   const isMissing = !!folder.scan_error && !isIndexing