Migrate to Expo SDK 54 with React Native 0.81

This major migration modernizes the app from React Native 0.64 to Expo SDK 54:

Core Changes:
- Upgrade React Native 0.64 → 0.81
- Upgrade React 17 → 19.1
- Migrate to Expo SDK 54 with New Architecture enabled
- Replace bare RN workflow with Expo managed workflow

Package Migrations:
- react-native-splash-screen → expo-splash-screen
- react-native-localize → expo-localization
- react-native-device-info → expo-device + expo-application
- react-native-keychain → expo-secure-store
- react-native-linear-gradient → expo-linear-gradient
- react-native-fast-image → expo-image
- @react-native-community/blur → expo-blur
- react-native-haptic-feedback → expo-haptics
- react-native-ultimate-config → expo-constants
- react-query → @tanstack/react-query
- AWS Amplify v3 → v6

Animation Updates:
- Migrate react-native-reanimated v1 → v4
- Update animation patterns to use useAnimatedStyle, useSharedValue
- Replace interpolate with new Reanimated 4 API

Build System:
- Remove ios/ and android/ folders (generated via expo prebuild)
- Add EAS Build configuration
- Update TypeScript to 5.9
- Add ESLint flat config
- Configure babel with module-resolver aliases

Breaking Changes:
- Native code is now generated via expo prebuild
- New Architecture (Fabric/TurboModules) is enabled
- Minimum iOS 13.4+, Android SDK 24+

Author: claude

.eslintignore

@@ -1,9 +1,7 @@
 # OSX
-#
 .DS_Store
 
 # Xcode
-#
 build/
 *.pbxuser
 !default.pbxuser
@@ -21,133 +19,94 @@ DerivedData
 *.ipa
 *.xcuserstate
 project.xcworkspace
-ios/builds/
-ios/build/
-ios/Vendor
-ios/Pods
-ios/sentry.properties
-ios/Intercom.framework
-ios/fastlane/
-ios/GoogleService-Info
-ios/AppCenter-Config.plist
-ios/assets
 
 # Android/IntelliJ
-#
 build/
 .idea
 .gradle
 local.properties
 *.iml
 *.hprof
-android/app/src/main/res/raw/
-raw
-android/keystores/
-android/app/src/main/res
-android/fastlane
-android/app/src/main/assets/
-android/app/src/main/resources/
-android/app/client_secret.json
-android/fastlane/
-
-
-# fastlane specific
-fastlane/report.xml
-
-
-# deliver temporary files
-fastlane/Preview.html
-
-# snapshot generated screenshots
-fastlane/screenshots
-
-# scan temporary files
-fastlane/test_output
-
-# Fastlane builds
-builds/*
 
 # node.js
-#
 node_modules/
-.jest/
 npm-debug.log
 yarn-error.log
-coverage
+.yarn/
 
 # BUCK
 buck-out/
 \.buckd/
 *.keystore
 !debug.keystore
 
-# fastlane
-#
-# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
-# screenshots whenever they are needed.
-# For more information about the recommended setup visit:
-# https://docs.fastlane.tools/best-practices/source-control/
-
-*/fastlane/report.xml
-*/fastlane/Preview.html
-*/fastlane/screenshots
-
 # Bundle artifact
 *.jsbundle
 
+# Expo
+.expo/
+dist/
+web-build/
+expo-env.d.ts
+
+# Native folders (generated by expo prebuild)
+ios/
+android/
+
+# EAS
+.eas/
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# Testing
+coverage/
+.jest/
+
+# TypeScript
+*.tsbuildinfo
+
+# Misc
+*.log
+*.lock
+!package-lock.json
+
+# fastlane
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots
+fastlane/test_output
+builds/*
+
 # CocoaPods
-ios/Pods/
-#amplify
+Pods/
+
+# AWS Amplify
 amplify/\#current-cloud-backend
 amplify/.config/local-*
 amplify/mock-data
 amplify/backend/amplify-meta.json
 amplify/backend/awscloudformation
 amplify/backend/hosting
 amplify/team-provider-info.json
-build/
-dist/
-aws-exports.js
-awsconfiguration.json
-amplifyconfiguration.json
-amplify-gradle-config.json
-amplifyxc.config
-.secrets
-.env
-sentry.properties
-android/.project
-android/debug.keystore
-android/.settings/org.eclipse.buildship.core.prefs
-ios/Nyxo/GoogleService-Info.plist
-android/app/google-services.json
-android/app/.settings/org.eclipse.jdt.core.prefs
-android/app/.settings/org.eclipse.buildship.core.prefs
-ios/Nyxo/AppCenter-Config.plist
-rnuc.xcconfig
-android/app/.project
-
-ios/GoogleService-Info.plist
-android/debug.keystore.properties
-android/release.keystore.properties
-android/app/release.keystore.properties
-android/app/debug.keystore.properties
-
-#amplify
-amplify/\#current-cloud-backend
-amplify/.config/local-*
 amplify/logs
-amplify/mock-data
-amplify/backend/amplify-meta.json
-amplify/backend/awscloudformation
 amplify/backend/.temp
-build/
-dist/
-node_modules/
 aws-exports.js
 awsconfiguration.json
 amplifyconfiguration.json
-amplify-build-config.json
 amplify-gradle-config.json
+amplifyxc.config
+amplify-build-config.json
 amplifytools.xcconfig
 .secret-*
-amplify/team-provider-info.json
+.secrets
+
+# Sentry
+sentry.properties
+
+# Google Services
+google-services.json
+GoogleService-Info.plist
+AppCenter-Config.plist

.eslintrc.js

@@ -0,0 +1,8 @@
+{
+  "semi": false,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "none",
+  "printWidth": 80,
+  "bracketSameLine": true
+}