feat(portal-rail-links): update icons for M3U playlist links

feat(portal-activity-item): add PortalAddedItem interface for recently-added catalog items

libs/portal/shared/util/src/lib/navigation/portal-rail-links.spec.ts

@@ -81,7 +81,7 @@ describe('buildPortalRailLinks', () => {
 
         expect(links.primary).toEqual([
             {
-                icon: 'list',
+                icon: 'tv',
                 tooltip: 'All channels (this playlist)',
                 path: ['/workspace', 'playlists', 'm3u-1', 'all'],
                 exact: true,
@@ -102,7 +102,7 @@ describe('buildPortalRailLinks', () => {
                 section: 'recent',
             },
             {
-                icon: 'star',
+                icon: 'favorite',
                 tooltip: 'Favorites (this playlist)',
                 path: ['/workspace', 'playlists', 'm3u-1', 'favorites'],
                 exact: true,

libs/shared/interfaces/src/lib/portal-activity-item.interface.ts

@@ -30,3 +30,8 @@ export interface PortalRecentItem extends PortalActivityItem {
 export interface PortalFavoriteItem extends PortalActivityItem {
     added_at: string;
 }
+
+/** A recently-added catalog item with an `added_at` timestamp. */
+export interface PortalAddedItem extends PortalActivityItem {
+    added_at: string;
+}