feat(timeline): focus follows archive, snaps to first on view load

- New selection.focusAfter(excluded) walks selection.order forward past
  the archived/restored set so X-ing through the timeline keeps the
  cursor on the next live photo instead of falling back to photo[0]
  via the auto-anchor effect. Wired into gridKeyNav.toggleArchive (X
  key) and BulkActionBar.onArchive.
- Auto-focus effect on the timeline always re-anchors to photos[0] on
  view load (pageCount → 1), instead of preserving a stale uid from
  the previous filter.
- PhotoGrid re-anchors focus when the previously focused uid isn't in
  the new photo set, so drilling into a /tags category drops the
  cursor on its first tile instead of carrying a stale selection from
  whatever view the user came from.

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

web/src/lib/components/sidebar/RightSidebar.svelte

@@ -15,6 +15,7 @@
 		ExternalLink,
 		Heart,
 		ImageIcon,
+		Loader2,
 		Lock,
 		MapPin,
 		Star,
@@ -244,11 +245,14 @@
 		void applyMark({ color: value });
 	}
 
+	// Tooltips follow the Lightroom culling convention so the swatches
+	// read as actions, not just colors. Red = reject, Yellow = pick,
+	// Green = keep, Orange = review-later.
 	const COLOR_SWATCHES: { key: string; bg: string; title: string }[] = [
-		{ key: 'red', bg: 'bg-red-500', title: 'Red' },
-		{ key: 'orange', bg: 'bg-orange-500', title: 'Orange' },
-		{ key: 'yellow', bg: 'bg-yellow-400', title: 'Yellow' },
-		{ key: 'green', bg: 'bg-green-500', title: 'Green' }
+		{ key: 'red', bg: 'bg-red-500', title: 'Red — reject' },
+		{ key: 'orange', bg: 'bg-orange-500', title: 'Orange — review' },
+		{ key: 'yellow', bg: 'bg-yellow-400', title: 'Yellow — pick' },
+		{ key: 'green', bg: 'bg-green-500', title: 'Green — keep' }
 	];
 
 	const photoMark = $derived<PhotoMark>(marksQuery.data?.[photo.UID] ?? {});
@@ -314,6 +318,11 @@
 			onkeydown={(e) => e.key === 'Enter' && (e.currentTarget as HTMLInputElement).blur()}
 			title={renaming ? 'Renaming…' : 'Click to rename file on disk'}
 		/>
+		<!-- Inline spinner next to the filename so the user sees the rename
+		     in flight without having to scan to the bottom of the sidebar. -->
+		{#if renaming}
+			<Loader2 class="h-3 w-3 shrink-0 animate-spin text-muted-foreground" />
+		{/if}
 		<button
 			class="rounded p-1 hover:bg-accent disabled:opacity-50"
 			class:text-red-500={photo.Favorite}