Build all apps from Markdown content; Compose Desktop replaces GTK on Linux and Windows

- content/ + scripts/build-content.py produce content.json for every app
- stable lesson IDs with one-time progress migration (Swift, Kotlin)
- shared answer-check tests (tests/answers.json) for Kotlin and Swift
- android/desktop: Compose app with updater, speech and GTK progress import
- CI packages AppImage and Windows zip with ProGuard, runs the tests

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/build.yml

@@ -24,19 +24,27 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install dependencies
+      # ProGuard and jlink need a JDK that ships jmods; Temurin 21 does.
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+
+      - uses: gradle/actions/setup-gradle@v4
+        with:
+          build-root-directory: android
+
+      - name: Answer checks
         run: |
-          sudo apt-get update
-          sudo apt-get install -y \
-            build-essential pkg-config curl \
-            libgtk-4-dev librsvg2-dev \
-            desktop-file-utils \
-            appstream
+          chmod +x android/gradlew
+          cd android
+          ./gradlew :desktop:test --no-daemon
 
       - name: Build AppImage
         env:
           COMMIT: ${{ github.sha }}
         run: |
+          export PACKAGE_JDK="$JAVA_HOME"
           chmod +x scripts/bundle-linux.sh
           ./scripts/bundle-linux.sh
 
@@ -51,38 +59,35 @@ jobs:
     runs-on: windows-latest
     defaults:
       run:
-        shell: msys2 {0}
+        shell: bash
     steps:
       - uses: actions/checkout@v4
 
-      - uses: msys2/setup-msys2@v2
+      - uses: actions/setup-java@v4
         with:
-          msystem: UCRT64
-          update: true
-          install: >-
-            make
-            zip
-            mingw-w64-ucrt-x86_64-gcc
-            mingw-w64-ucrt-x86_64-gtk4
-            mingw-w64-ucrt-x86_64-pkg-config
-            mingw-w64-ucrt-x86_64-make
+          distribution: temurin
+          java-version: 21
 
-      - name: Build and bundle
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - uses: gradle/actions/setup-gradle@v4
+        with:
+          build-root-directory: android
+
+      - name: Build zip
         env:
           COMMIT: ${{ github.sha }}
         run: |
-          make bundle
-          cd dist
-          zip -qry ../graduately-windows-x64.zip .
-          cd ..
-          mkdir -p dist-out
-          mv graduately-windows-x64.zip dist-out/
+          export PACKAGE_JDK="$JAVA_HOME"
+          bash scripts/bundle-windows.sh
 
       - name: Upload artifact
         uses: actions/upload-artifact@v4
         with:
           name: graduately-windows
-          path: dist-out/graduately-windows-x64.zip
+          path: dist/graduately-windows-x64.zip
 
   macos:
     name: macOS app
@@ -173,11 +178,11 @@ jobs:
         with:
           build-root-directory: android
 
-      - name: Extract content and build APK
+      - name: Build content and APK
         env:
           COMMIT: ${{ github.sha }}
         run: |
-          python3 scripts/extract-android-content.py
+          python3 scripts/build-content.py
           chmod +x android/gradlew
           cd android
           ./gradlew :app:assembleRelease --no-daemon
@@ -198,7 +203,14 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Extract content and build IPA
+      - name: Answer checks
+        env:
+          DEVELOPER_DIR: /Applications/Xcode.app/Contents/Developer
+        run: |
+          chmod +x scripts/test-answers-swift.sh
+          ./scripts/test-answers-swift.sh
+
+      - name: Build content and IPA
         env:
           COMMIT: ${{ github.sha }}
           DEVELOPER_DIR: /Applications/Xcode.app/Contents/Developer
@@ -253,6 +265,8 @@ jobs:
           [ -f fresh/graduately-android.apk ] && echo "${{ github.sha }}" > staged/VERSION-android
           [ -f fresh/graduately-ios.ipa ] && echo "${{ github.sha }}" > staged/VERSION-ios
           ls fresh/graduately-macos-*.zip >/dev/null 2>&1 && echo "${{ github.sha }}" > staged/VERSION-macos
+          [ -f fresh/graduately-windows-x64.zip ] && echo "${{ github.sha }}" > staged/VERSION-windows
+          [ -f fresh/graduately-linux-x86_64.AppImage ] && echo "${{ github.sha }}" > staged/VERSION-linux
           # Compatibility aliases so older installers/updaters still find packages.
           [ -f staged/graduately-macos-arm64.zip ] && cp -f staged/graduately-macos-arm64.zip staged/maturita-macos-arm64.zip
           [ -f staged/graduately-macos-x86_64.zip ] && cp -f staged/graduately-macos-x86_64.zip staged/maturita-macos-x86_64.zip