Add Expo mobile app for Catnip workspace management (#189)

## Summary

Added a new React Native/Expo mobile application that provides native
mobile access to Catnip workspaces and Claude AI interactions. The app
connects to the existing CloudFlare worker API at `catnip.run/v1/*` to
enable mobile users to manage their development workflows.

## Key Features

- **GitHub OAuth authentication** via Expo AuthSession with secure token
storage
- **Codespace connection** with real-time status updates through
Server-Sent Events
- **Workspace management** allowing users to view, interact with, and
send prompts to Claude
- **Modern Expo SDK 52** with file-based routing using Expo Router
- **Pure Expo components** with no custom React Native dependencies for
maximum compatibility

## Implementation Notes

The mobile app mirrors the existing web Mobile components
(`WorkspaceMobile.tsx`, `CodespaceAccess.tsx`) while being optimized for
native mobile experience. It uses Expo's latest features including
SecureStore for encrypted credentials, AuthSession for OAuth flows, and
built-in fetch for API communication. The app is ready for deployment to
both iOS and Android platforms via Expo's build service.

---------

Co-authored-by: Claude <claude@anthropic.com>
Co-authored-by: Claude <noreply@anthropic.com>

Author: 3 people

.claude/settings.local.json

@@ -5,7 +5,9 @@
       "Bash(vite build)",
       "Bash(pnpm build:*)",
       "Bash(git add:*)",
-      "Bash(git commit:*)"
+      "Bash(git commit:*)",
+      "WebFetch(domain:expo.dev)",
+      "WebSearch"
     ],
     "deny": [],
     "ask": []

.github/workflows/test-ios.yml

@@ -0,0 +1,72 @@
+name: Test iOS
+
+on:
+  push:
+    paths:
+      - "xcode/**"
+      - ".github/workflows/test-ios.yml"
+
+jobs:
+  unit-tests:
+    runs-on: macos-14
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Select Xcode version
+        run: sudo xcode-select -s /Applications/Xcode_16.1.app
+
+      - name: List available simulators
+        run: xcrun simctl list devices available iPhone
+
+      - name: Build and run unit tests
+        run: |
+          xcodebuild test \
+            -project xcode/catnip.xcodeproj \
+            -scheme catnip \
+            -destination 'platform=iOS Simulator,name=iPhone 16,OS=18.1' \
+            -only-testing:catnipTests \
+            -enableCodeCoverage YES \
+            CODE_SIGN_IDENTITY="" \
+            CODE_SIGNING_REQUIRED=NO
+
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: unit-test-results
+          path: |
+            ~/Library/Developer/Xcode/DerivedData/*/Logs/Test/*.xcresult
+
+  ui-tests:
+    runs-on: macos-14
+    if: github.ref == 'refs/heads/main'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Select Xcode version
+        run: sudo xcode-select -s /Applications/Xcode_16.1.app
+
+      - name: List available simulators
+        run: xcrun simctl list devices available iPhone
+
+      - name: Build and run UI tests
+        run: |
+          xcodebuild test \
+            -project xcode/catnip.xcodeproj \
+            -scheme catnip \
+            -destination 'platform=iOS Simulator,name=iPhone 16,OS=18.1' \
+            -only-testing:catnipUITests \
+            CODE_SIGN_IDENTITY="" \
+            CODE_SIGNING_REQUIRED=NO
+
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: ui-test-results
+          path: |
+            ~/Library/Developer/Xcode/DerivedData/*/Logs/Test/*.xcresult

.gitignore

@@ -55,3 +55,6 @@ container/internal/assets/dist/*
 !container/internal/assets/dist/index.html
 !container/internal/assets/dist/.gitkeep
 
+
+# Xcode user-specific files
+**/xcuserdata/

.watchmanconfig

@@ -0,0 +1 @@
+{}

catnip-mobile/.env.local.example

@@ -0,0 +1,5 @@
+# Optional: Custom Catnip API base URL (defaults to https://catnip.run)
+# EXPO_PUBLIC_CATNIP_BASE_URL=https://your-custom-domain.com
+
+# Note: No GitHub client ID needed - OAuth is handled server-side via relay
+# The mobile app uses secure session tokens provided by the worker

catnip-mobile/.gitignore

@@ -0,0 +1,36 @@
+# Learn more https://docs.github.com/en/get-started/getting-started-with-git/ignoring-files
+
+# dependencies
+node_modules/
+
+# Expo
+.expo/
+dist/
+web-build/
+expo-env.d.ts
+
+# Native
+*.orig.*
+*.jks
+*.p8
+*.p12
+*.key
+*.mobileprovision
+
+# Metro
+.metro-health-check*
+
+# debug
+npm-debug.*
+yarn-debug.*
+yarn-error.*
+
+# macOS
+.DS_Store
+*.pem
+
+# local env files
+.env*.local
+
+# typescript
+*.tsbuildinfo.validate-build/