web: single-pointer selection + post-action focus, video debounce, tags metadata sidebar

Selection: plain arrow nav now clears prior multi-selection so exactly
one tile is ringed at a time; shift-extend still grows from the anchor.
onApprove / onRestore / onDelete advance focus via focusAfter(ids)
before clearing selection, matching onArchive.

Preview: defer mounting <VideoPlayer> by 250ms so arrow-skim across
video tiles doesn't open and immediately cancel range requests; hard-
abort the underlying <video> on unmount so the connection releases.

Tags drill view: right-sidebar metadata wired in (single-photo
RightSidebar, BulkMetadataSidebar for >=2 selected), resizable edge
mirrors the timeline.

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

web/src/lib/components/timeline/BulkActionBar.svelte

@@ -87,6 +87,7 @@
 			} else {
 				toast.success(`Kept ${ids.length}`);
 			}
+			focusAfter(ids);
 			clearSelection();
 		});
 	}
@@ -124,6 +125,7 @@
 		await withBusy(async () => {
 			try {
 				await batchDelete(ids);
+				focusAfter(ids);
 				clearSelection();
 				toast.success(`Deleted ${ids.length}`);
 			} catch (err) {
@@ -142,6 +144,7 @@
 					await batchArchive(ids);
 					void qc.invalidateQueries({ queryKey: ['photos'] });
 				});
+				focusAfter(ids);
 				clearSelection();
 				toast.success(`Restored ${ids.length}`);
 			} catch (err) {