feat: add MCP configuration and update login page design

- Introduced a new `.mcp.json` file for server configurations.
- Updated `package.json` to include the `shadcn` dependency.
- Modified `pnpm-lock.yaml` to reflect the new dependency.
- Adjusted `.claude/settings.local.json` to disable specific MCP servers.
- Enhanced the login page design in `login.vue` with improved layout and user experience elements.

package.json

@@ -24,6 +24,7 @@
     "@nuxt/eslint": "^1.15.2",
     "@types/node": "^22.13.10",
     "eslint": "^10.0.2",
+    "shadcn": "^4.0.0",
     "typescript": "^5.9.3",
     "vue-tsc": "^3.2.5"
   },