feat: add date-fns dependency and update HomePage component

- Added `date-fns` as a dependency in `package.json` and `package-lock.json`.
- Refactored `Home` component to `HomePage`, implementing server-side rendering for tasks and stats retrieval.
- Integrated `Header` and `KanbanBoard` components for improved UI structure.
- Marked Kanban components as completed in `TODO.md`.

package.json

@@ -10,6 +10,7 @@
   },
   "dependencies": {
     "@prisma/client": "^6.16.1",
+    "date-fns": "^4.1.0",
     "next": "15.5.3",
     "prisma": "^6.16.1",
     "react": "19.1.0",