feat: initial implementation — all 35 requirements across phases 1-3

Backend (Spring Boot 3.2 / Java 21 / PostgreSQL):
- JWT auth with BCrypt password hashing
- User profile + Mifflin-St Jeor BMR calculator
- Food search + barcode via OpenFoodFacts API with local cache
- Meal CRUD with user data isolation and ownership checks
- AI photo analysis (OpenAI Vision) with confidence intervals
- AI correction feedback loop for personalisation
- Flyway DB migrations + RFC-7807 error responses

Mobile (React Native / TypeScript):
- Full navigation stack (Auth → Tabs → Home stack)
- Design tokens (WCAG 2.2 AA colours, 8px grid, 48px touch targets)
- 10 screens: Login, Register, Home, Search, Camera, AI Result, Edit Meal,
  Daily Details, History, Profile
- Confidence-aware calorie display (kcal ± range)
- Repeat last meal shortcut + macro tracking

Docs:
- docs/PLAN-AND-REQUIREMENTS.md
- docs/traceability.csv (35 requirements, all Implemented)

mobile/package.json

@@ -0,0 +1,43 @@
+{
+  "name": "calorie-counter-mobile",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "android": "react-native run-android",
+    "ios": "react-native run-ios",
+    "start": "react-native start",
+    "test": "jest",
+    "lint": "eslint src --ext .ts,.tsx"
+  },
+  "dependencies": {
+    "react": "18.2.0",
+    "react-native": "0.73.6",
+    "@react-navigation/native": "^6.1.17",
+    "@react-navigation/bottom-tabs": "^6.5.20",
+    "@react-navigation/native-stack": "^6.9.26",
+    "react-native-screens": "^3.31.1",
+    "react-native-safe-area-context": "^4.10.1",
+    "react-native-camera": "^4.2.1",
+    "@react-native-community/slider": "^4.5.2",
+    "axios": "^1.7.2",
+    "@react-native-async-storage/async-storage": "^1.23.1",
+    "react-native-vector-icons": "^10.1.0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.24.0",
+    "@babel/preset-env": "^7.24.0",
+    "@babel/runtime": "^7.24.0",
+    "@react-native/eslint-config": "^0.73.2",
+    "@react-native/metro-config": "^0.73.5",
+    "@tsconfig/react-native": "^3.0.3",
+    "@types/react": "^18.2.72",
+    "@types/react-native": "^0.73.0",
+    "@types/react-native-vector-icons": "^6.4.18",
+    "typescript": "5.0.4",
+    "jest": "^29.6.3",
+    "@testing-library/react-native": "^12.4.3"
+  },
+  "jest": {
+    "preset": "react-native"
+  }
+}