feat(web): native favorites, lightbox zoom, EXIF jump links + perf fix

- Favorites use PhotoPrism's own like/unlike endpoint (not a mule-only
  mark) so they sync to third-party gallery apps, with heart controls
  in the tile, sidebar, and an `f` shortcut.
- Lightbox: wheel-zoom around cursor, double-click to 2.5x, drag-to-pan,
  auto-upgrades to the fit_2048 tile past 1.25x zoom.
- Sidebar: copy-EXIF button, clickable Camera/Lens values that jump to
  a filtered timeline (camera:/lens: DSL), matching the existing
  Country link.
- Fix filtersToQ() quoting the entire search string whenever it
  contained a colon, which silently turned any raw DSL operator
  (camera:, taken:2024, etc.) into a literal phrase search — discovered
  while verifying the new jump-links against production.
- Disable TanStack Query's refetchOnWindowFocus: the indexer WebSocket
  already invalidates photo queries on real changes, so the focus
  refetch was just a redundant full-timeline re-render on tab-switch.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/lib/services/photoActions.ts

@@ -19,6 +19,8 @@ import {
 	batchArchive,
 	batchRestore,
 	buildTakenAtPatch,
+	likePhoto,
+	unlikePhoto,
 	updatePhoto
 } from './photoprism';
 import { queryClient } from '$lib/queryClient';
@@ -121,6 +123,70 @@ export async function acceptDateAndKeep(uids: string[]): Promise<void> {
 	toast.success(`Kept ${uids.length}`, { id: tid });
 }
 
+/** Patch `Favorite` on every cached copy of the uids (timeline pages,
+ *  per-photo detail) so hearts flip instantly without a refetch. */
+function patchFavoriteCaches(uids: string[], value: boolean): void {
+	const target = new Set(uids);
+	const lists = queryClient.getQueriesData({ queryKey: ['photos'] });
+	for (const [key, data] of lists) {
+		if (!data) continue;
+		if (Array.isArray(data)) {
+			queryClient.setQueryData(
+				key,
+				(data as PpPhoto[]).map((p) => (target.has(p.UID) ? { ...p, Favorite: value } : p))
+			);
+			continue;
+		}
+		const pages = (data as { pages?: PpPhoto[][] }).pages;
+		if (!Array.isArray(pages)) continue;
+		queryClient.setQueryData(key, {
+			...(data as object),
+			pages: pages.map((pg) =>
+				pg.map((p) => (target.has(p.UID) ? { ...p, Favorite: value } : p))
+			)
+		});
+	}
+	for (const uid of uids) {
+		const p = queryClient.getQueryData<PpPhoto>(['photo', uid]);
+		if (p) queryClient.setQueryData(['photo', uid], { ...p, Favorite: value });
+	}
+}
+
+/**
+ * Toggle PhotoPrism's native favorite flag on a set of photos. Target
+ * state comes from the first uid (mixed selections converge). Optimistic
+ * cache flip with rollback; undo re-toggles.
+ */
+export async function toggleFavorite(uids: string[]): Promise<void> {
+	if (uids.length === 0) {
+		toast.message('Nothing to favorite', {
+			description: 'Click a photo or select some first'
+		});
+		return;
+	}
+	const value = !(cachedPhoto(uids[0])?.Favorite ?? false);
+	patchFavoriteCaches(uids, value);
+	const { errors } = await batchEdit(uids, (id) => (value ? likePhoto(id) : unlikePhoto(id)));
+	if (errors.length) {
+		patchFavoriteCaches(uids, !value);
+		toast.error(`Favorite failed on ${errors.length}`, { description: errors[0].message });
+		return;
+	}
+	toast.success(
+		value
+			? uids.length === 1
+				? 'Added to favorites'
+				: `Favorited ${uids.length}`
+			: uids.length === 1
+				? 'Removed from favorites'
+				: `Unfavorited ${uids.length}`
+	);
+	pushUndo(value ? `Favorited ${uids.length}` : `Unfavorited ${uids.length}`, async () => {
+		patchFavoriteCaches(uids, !value);
+		await batchEdit(uids, (id) => (value ? unlikePhoto(id) : likePhoto(id)));
+	});
+}
+
 /**
  * Archive photos. Reversible via the undo stack (Restore on ⌘Z).
  */