feat: complete Phase 2 of service refactoring

- Marked tasks in `TODO.md` as completed for moving analytics-related files to the `analytics` directory and correcting imports across the codebase.
- Updated imports in `src/actions/analytics.ts`, `src/actions/metrics.ts`, and various components to reflect the new structure.
- Removed unused `analytics.ts`, `manager-summary.ts`, and `metrics.ts` files to streamline the codebase.

src/app/weekly-manager/WeeklyManagerPageClient.tsx

@@ -2,7 +2,7 @@
 
 import { TasksProvider } from '@/contexts/TasksContext';
 import ManagerWeeklySummary from '@/components/dashboard/ManagerWeeklySummary';
-import { ManagerSummary } from '@/services/manager-summary';
+import { ManagerSummary } from '@/services/analytics/manager-summary';
 import { Task, Tag } from '@/lib/types';
 
 interface WeeklyManagerPageClientProps {

src/app/weekly-manager/page.tsx

@@ -1,5 +1,5 @@
 import { Header } from '@/components/ui/Header';
-import { ManagerSummaryService } from '@/services/manager-summary';
+import { ManagerSummaryService } from '@/services/analytics/manager-summary';
 import { tasksService } from '@/services/tasks';
 import { tagsService } from '@/services/tags';
 import { WeeklyManagerPageClient } from './WeeklyManagerPageClient';