Add local build scripts via Expo CNG/prebuild

- prebuild: generate native ios/ and android/ projects
- prebuild:clean: regenerate from scratch
- run:ios / run:android: build and run locally with Xcode/Gradle
- Add ios/ and android/ to .gitignore (CNG-generated)

Allows building locally without EAS credits:
  pnpm --filter @trails-cool/mobile prebuild
  pnpm --filter @trails-cool/mobile run:ios

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/mobile/.gitignore

@@ -9,6 +9,10 @@ dist/
 web-build/
 expo-env.d.ts
 
+# CNG (Continuous Native Generation)
+ios/
+android/
+
 # Native
 .kotlin/
 *.orig.*

apps/mobile/app.config.ts

@@ -44,7 +44,6 @@ export default ({ config }: ConfigContext): ExpoConfig => ({
       project: "mobile",
     }],
     "expo-sqlite",
-    "react-native-reanimated",
   ],
   extra: {
     eas: {

apps/mobile/package.json

@@ -11,15 +11,16 @@
     }
   },
   "scripts": {
-    "start": "expo start",
-    "android": "expo start --android",
-    "ios": "expo start --ios",
-    "web": "expo start --web",
+    "start": "expo start --dev-client",
+    "prebuild": "expo prebuild",
+    "prebuild:clean": "expo prebuild --clean",
+    "ios": "expo run:ios",
+    "android": "expo run:android",
     "typecheck": "tsc --noEmit",
     "test": "jest",
     "lint": "eslint .",
-    "build:dev": "npx eas-cli build:dev --platform ios",
-    "build:preview": "npx eas-cli build --profile preview --platform all"
+    "eas:dev": "npx eas-cli build:dev --platform ios",
+    "eas:preview": "npx eas-cli build --profile preview --platform all"
   },
   "jest": {
     "preset": "jest-expo",
@@ -28,6 +29,7 @@
     ]
   },
   "dependencies": {
+    "@expo/metro-runtime": "^55.0.9",
     "@gorhom/bottom-sheet": "^5.2.9",
     "@maplibre/maplibre-react-native": "^10.4.2",
     "@sentry/cli": "^3.3.5",
@@ -37,17 +39,24 @@
     "@trails-cool/i18n": "workspace:*",
     "@trails-cool/map-core": "workspace:*",
     "@trails-cool/types": "workspace:*",
-    "expo": "~55.0.14",
-    "expo-constants": "~55.0.13",
+    "expo": "~55.0.15",
+    "expo-constants": "~55.0.14",
     "expo-crypto": "~55.0.14",
     "expo-dev-client": "~55.0.27",
-    "expo-linking": "~55.0.12",
+    "expo-dev-menu": "^55.0.23",
+    "expo-device": "~55.0.15",
+    "expo-file-system": "~55.0.16",
+    "expo-linking": "~55.0.13",
+    "expo-localization": "~55.0.13",
     "expo-location": "~55.1.8",
-    "expo-notifications": "~55.0.18",
+    "expo-navigation-bar": "~55.0.12",
+    "expo-notifications": "~55.0.19",
     "expo-router": "~55.0.12",
     "expo-secure-store": "~55.0.13",
+    "expo-splash-screen": "~55.0.18",
     "expo-sqlite": "~55.0.15",
     "expo-status-bar": "~55.0.5",
+    "expo-system-ui": "^55.0.15",
     "expo-web-browser": "~55.0.14",
     "react": "catalog:",
     "react-native": "0.83.4",