web(review): scope date suggestion to EXIF Stripped tab + 'a' shortcut

- Gate the sidebar's "Suggested from path" row on /review?tab=stripped_exif
  instead of a per-photo TakenSrc heuristic — PhotoPrism stores a guessed
  TakenAt for stripped-EXIF photos too, so the heuristic was hiding the
  row even when a path-derived date was available.
- Same gate on the BulkActionBar's "Accept date & Keep" button.
- Extract acceptDateAndKeep() + cachedPhoto() into photoActions so the
  bar button and a new bare-'a' shortcut in gridKeyNav share one path.
- Show an 'A' kbd hint on the bar button.

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

web/src/lib/actions/gridKeyNav.ts

@@ -10,6 +10,7 @@ import {
 	removeFromHeap,
 	type PpAlbum
 } from '$lib/services/photoprism';
+import { acceptDateAndKeep } from '$lib/services/photoActions';
 import { queryClient } from '$lib/queryClient';
 import { filters } from '$lib/stores/filters.svelte';
 import {
@@ -498,6 +499,30 @@ export function gridKeyNav(node: HTMLElement, params: GridKeyNavParams = {}) {
 				if (meta) {
 					e.preventDefault();
 					for (const id of selection.order) selection.ids.add(id);
+					return;
+				}
+				if (shift) return;
+				// Bare `a` on the EXIF Stripped review tab fires the same
+				// "Accept date & Keep" flow the bar button uses. Scoped to
+				// that tab so the key stays free everywhere else (where a
+				// path-derived date wouldn't make sense as a one-shot
+				// shortcut). Reads location directly because actions sit
+				// outside the component tree where `$app/state` is
+				// idiomatic — same approach used by `filters.section`
+				// elsewhere in this file.
+				if (
+					filters.section === 'review' &&
+					new URL(window.location.href).searchParams.get('tab') === 'stripped_exif'
+				) {
+					e.preventDefault();
+					const ids = cullTargets();
+					if (ids.length === 0) {
+						toast.message('Nothing to keep', {
+							description: 'Click a photo or select some first'
+						});
+						return;
+					}
+					void acceptDateAndKeep(ids);
 				}
 				return;
 			case 'x':