Add Phase 1 Pocket Pascal UI: home, pantry, week plan, and plate.

Replace the hello-world shell with the elevated design system, bilingual screens, recipe/extras data, and the interactive Mein Teller view.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/package.json

@@ -19,6 +19,7 @@
     "lucide-react": "^1.28.0",
     "react": "^19.2.8",
     "react-dom": "^19.2.8",
+    "react-router-dom": "^7.18.2",
     "shadcn": "^4.16.1",
     "tailwind-merge": "^3.6.0",
     "tailwindcss": "^4.3.3",
@@ -29,6 +30,7 @@
     "@types/node": "^24.13.3",
     "@types/react": "^19.2.17",
     "@types/react-dom": "^19.2.3",
+    "@types/react-router-dom": "^5.3.3",
     "@vitejs/plugin-react": "^6.0.4",
     "oxlint": "^1.75.0",
     "typescript": "~6.0.2",