feat(08-03): FavoritesWidget frontend + API client + page.tsx wiring (GREEN)

- favorites-api.ts: FavoriteLink type + fetchFavorites/createFavorite/updateFavorite/deleteFavorite
  all use credentials: include and API_URL/favorites
- favorites-widget.tsx: list/grid view, inline add/edit/delete in edit mode,
  icon + letter fallback, rel=noreferrer + target=_blank, no dangerouslySetInnerHTML (T-08-07)
- useEffect deps fixed to [instanceId] only — excludes t() to prevent re-fetch on each render
- page.tsx: wireFavoritesWidget(FavoritesWidget) wired
- Full test suite: 81/81 pass (17 test files)
- Web TypeScript: clean

apps/web/src/app/(portal)/page.tsx

@@ -5,13 +5,14 @@ import { useTranslations } from 'next-intl';
 import { DashboardGrid } from '@/components/dashboard/dashboard-grid';
 import { EditModeToggle } from '@/components/dashboard/edit-mode-toggle';
 import { WidgetCatalogModal } from '@/components/dashboard/widget-catalog-modal';
-import { wireClockWidget, wireSearchWidget, wireCalendarWidget, wireNoteWidget, wireCalculatorWidget, wireStopwatchWidget } from '@/components/dashboard/widget-registry';
+import { wireClockWidget, wireSearchWidget, wireCalendarWidget, wireNoteWidget, wireCalculatorWidget, wireStopwatchWidget, wireFavoritesWidget } from '@/components/dashboard/widget-registry';
 import { ClockWidget } from '@/components/dashboard/widgets/clock-widget';
 import { SearchWidget } from '@/components/dashboard/widgets/search-widget';
 import { CalendarWidget } from '@/components/dashboard/widgets/calendar-widget';
 import { NoteWidget } from '@/components/dashboard/widgets/note-widget';
 import { CalculatorWidget } from '@/components/dashboard/widgets/calculator-widget';
 import { StopwatchWidget } from '@/components/dashboard/widgets/stopwatch-widget';
+import { FavoritesWidget } from '@/components/dashboard/widgets/favorites-widget';
 import { useDashboardStore } from '@/lib/stores/dashboard-store';
 import type { WidgetType } from '@/components/dashboard/widget-registry';
 
@@ -22,6 +23,7 @@ wireCalendarWidget(CalendarWidget);
 wireNoteWidget(NoteWidget);
 wireCalculatorWidget(CalculatorWidget);
 wireStopwatchWidget(StopwatchWidget);
+wireFavoritesWidget(FavoritesWidget);
 
 export default function DashboardPage() {
   const t = useTranslations('widgets');