chore(web): minor UX improvements of "view asset owners" feature (#24319)

* feat: toggle in options modal

* feat(i18n): add labels to display who uploaded each asset and show asset owners

* feat: migrate asset owner settings to TimelineManager and update AlbumOptionsModal

* Revert "feat(i18n): add labels to display who uploaded each asset and show asset owners"

This reverts commit cf8f4eb135.

* fix: simplify AlbumOptionsModal invocation and update aria-label for asset owners

* feat(i18n): add label for viewing asset owners in the interface

* feat: add tests for showAssetOwners functionality in TimelineManager

* chore: move asset owner visibility toggle to kebabu menu

web/src/lib/managers/timeline-manager/timeline-manager.svelte.spec.ts

@@ -692,4 +692,42 @@ describe('TimelineManager', () => {
       expect(discoveredAssets.size).toBe(assetCount);
     });
   });
+
+  describe('showAssetOwners', () => {
+    const LS_KEY = 'album-show-asset-owners';
+
+    beforeEach(() => {
+      // ensure clean state
+      globalThis.localStorage?.removeItem(LS_KEY);
+    });
+
+    it('defaults to false', () => {
+      const timelineManager = new TimelineManager();
+      expect(timelineManager.showAssetOwners).toBe(false);
+    });
+
+    it('setShowAssetOwners updates value', () => {
+      const timelineManager = new TimelineManager();
+      timelineManager.setShowAssetOwners(true);
+      expect(timelineManager.showAssetOwners).toBe(true);
+      timelineManager.setShowAssetOwners(false);
+      expect(timelineManager.showAssetOwners).toBe(false);
+    });
+
+    it('toggleShowAssetOwners flips value', () => {
+      const timelineManager = new TimelineManager();
+      expect(timelineManager.showAssetOwners).toBe(false);
+      timelineManager.toggleShowAssetOwners();
+      expect(timelineManager.showAssetOwners).toBe(true);
+      timelineManager.toggleShowAssetOwners();
+      expect(timelineManager.showAssetOwners).toBe(false);
+    });
+
+    it('persists across instances via localStorage', () => {
+      const a = new TimelineManager();
+      a.setShowAssetOwners(true);
+      const b = new TimelineManager();
+      expect(b.showAssetOwners).toBe(true);
+    });
+  });
 });

web/src/lib/managers/timeline-manager/timeline-manager.svelte.ts

@@ -14,6 +14,7 @@ import {
 } from '$lib/managers/timeline-manager/internal/search-support.svelte';
 import { WebsocketSupport } from '$lib/managers/timeline-manager/internal/websocket-support.svelte';
 import { CancellableTask } from '$lib/utils/cancellable-task';
+import { PersistedLocalStorage } from '$lib/utils/persisted';
 import {
   setDifference,
   toTimelineAsset,
@@ -90,6 +91,19 @@ export class TimelineManager extends VirtualScrollManager {
   #options: TimelineManagerOptions = TimelineManager.#INIT_OPTIONS;
   #updatingIntersections = false;
   #scrollableElement: HTMLElement | undefined = $state();
+  #showAssetOwners = new PersistedLocalStorage<boolean>('album-show-asset-owners', false);
+
+  get showAssetOwners() {
+    return this.#showAssetOwners.current;
+  }
+
+  setShowAssetOwners(value: boolean) {
+    this.#showAssetOwners.current = value;
+  }
+
+  toggleShowAssetOwners() {
+    this.#showAssetOwners.current = !this.#showAssetOwners.current;
+  }
 
   constructor() {
     super();