CI/CD: Add iOS build and test workflow to GitHub Actions

[sfloess]

Overview

iOS/macOS modules lack automated CI/CD, unlike desktop and Android which have comprehensive GitHub Actions workflows.

Current State

Existing CI/CD:

• ✅ Desktop: .github/workflows/main.yml (Maven build, test, deploy)
• ✅ Android: .github/workflows/android.yml (Gradle build, test, APK upload)
• ❌ iOS/macOS: Manual build only

Proposed Workflow

File: .github/workflows/ios.yml

name: iOS CI

on:
  push:
    branches: [ main ]
    paths:
      - 'jnexus-ios/**'
  pull_request:
    branches: [ main ]

jobs:
  build-ios:
    runs-on: macos-latest
    
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        
      - name: Setup Xcode
        uses: maxim-lobanov/setup-xcode@v1
        with:
          xcode-version: '15.0'
          
      - name: Build iOS
        run: |
          cd jnexus-ios
          xcodebuild -scheme JNexus-iOS -destination 'platform=iOS Simulator,name=iPhone 15' build
          
      - name: Build macOS
        run: |
          cd jnexus-ios
          xcodebuild -scheme JNexus-macOS -destination 'platform=macOS' build
          
      - name: Run Tests
        run: |
          cd jnexus-ios
          xcodebuild test -scheme JNexus-iOS -destination 'platform=iOS Simulator,name=iPhone 15'
          
      - name: Archive iOS App
        if: success()
        run: |
          cd jnexus-ios
          xcodebuild -scheme JNexus-iOS -archivePath build/JNexus.xcarchive archive
          
      - name: Upload iOS Archive
        uses: actions/upload-artifact@v4
        with:
          name: jnexus-ios
          path: jnexus-ios/build/JNexus.xcarchive
          retention-days: 30

Benefits

• Automated build verification on every push
• Catch iOS-specific issues early
• Test suite execution (once iOS: All unit tests are unimplemented TODOs - 0% test coverage #48 is resolved)
• IPA artifact generation for releases
• Platform parity with Android/Desktop

Blockers

• Issue iOS: All unit tests are unimplemented TODOs - 0% test coverage #48: iOS tests are TODOs (tests will fail until implemented)
• Could add continue-on-error: true for tests temporarily

Priority

Medium - iOS code works, but lacks CI verification

Related

• iOS: All unit tests are unimplemented TODOs - 0% test coverage #48: iOS unit tests unimplemented