feat(archive): red-cross flash + instant tile removal on archive/delete

Archive/delete now flash a red cross then drop tiles from the grid
immediately, instead of a green check that lingered until the slow
server-reconcile refetch landed. Keyboard `x` archive previously never
called markRemoved, so tiles only vanished on refetch — that lag is gone.

- Add 'removed' bulk state + removedBulk() helper (red cross overlay)
- gridKeyNav archive/delete: removedBulk -> 500ms flash -> markRemoved,
  clearRemoved once refetch settles; restore stays green check
- BulkActionBar: BulkConfig.removing routes archive/delete through the
  red flash; approve/restore/label/note unchanged

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/lib/stores/bulkAction.svelte.ts

@@ -6,6 +6,8 @@
  *   startBulk  → pill spins, all target tiles go "pending"
  *   setDetail  → pill shows the filename currently being processed (fan-out ops)
  *   doneBulk   → pill shows completion label, tiles flash green, auto-clears after 3 s
+ *   removedBulk→ destructive completion (archive / delete): tiles flash a red cross,
+ *                then the caller hides them via markRemoved; map auto-clears after 3 s
  *   failBulk   → tiles flash red, auto-clears after 2 s
  */
 
@@ -21,7 +23,7 @@ export const bulkAction = $state<BulkActionState>({ active: false, label: '' });
 // SvelteMap (not `$state(new Map())`) so a `.get(uid)` read in a PhotoTile
 // reliably re-runs when the entry flips — the plain-Map proxy form wasn't
 // re-rendering the timeline tiles' overlay.
-export const bulkPhotoStates = new SvelteMap<string, 'pending' | 'done' | 'error'>();
+export const bulkPhotoStates = new SvelteMap<string, 'pending' | 'done' | 'error' | 'removed'>();
 
 /**
  * UIDs hidden from the timeline grid the instant a removing action (archive /
@@ -71,6 +73,24 @@ export function doneBulk(label: string, ids: string[]): void {
 	}, 3000);
 }
 
+/**
+ * Destructive completion (archive / permanent delete): flash a red cross on the
+ * target tiles instead of the green check. The caller hides the tiles via
+ * markRemoved shortly after the flash; this timer only cleans up the state map.
+ */
+export function removedBulk(label: string, ids: string[]): void {
+	for (const id of ids) bulkPhotoStates.set(id, 'removed');
+	bulkAction.active = false;
+	bulkAction.label = label;
+	bulkAction.detail = undefined;
+	if (doneTimer !== null) clearTimeout(doneTimer);
+	doneTimer = setTimeout(() => {
+		bulkAction.label = '';
+		bulkPhotoStates.clear();
+		doneTimer = null;
+	}, 3000);
+}
+
 export function failBulk(ids: string[]): void {
 	for (const id of ids) bulkPhotoStates.set(id, 'error');
 	bulkAction.active = false;