feat: complete Phase 4 of service refactoring

- Marked tasks in `TODO.md` as completed for moving task-related files to the `task-management` directory and correcting imports across the codebase.
- Updated imports in `seed-data.ts`, `seed-tags.ts`, API routes, and various components to reflect the new structure.
- Removed obsolete `daily.ts`, `tags.ts`, and `tasks.ts` files to streamline the codebase.
- Added new tasks in `TODO.md` for future cleaning and organization of service imports.

src/app/daily/page.tsx

@@ -1,6 +1,6 @@
 import { Metadata } from 'next';
 import { DailyPageClient } from './DailyPageClient';
-import { dailyService } from '@/services/daily';
+import { dailyService } from '@/services/task-management/daily';
 import { getToday } from '@/lib/date-utils';
 
 // Force dynamic rendering (no static generation)