Replace Drone CI with Gitea Actions workflow

Drone server is gone; CI now lives in .gitea/workflows/build.yml.
Three jobs: GDScript validation (godot --headless --import + error
grep), desktop matrix (Windows / Linux / macOS), and Android (JDK 17
+ SDK installed at runtime, keystore from ANDROID_KEYSTORE_BASE64
secret or generated). Build only — Butler / itch.io deploy not wired.

Notes in .gitea/workflows/README.md cover the Godot-4 pre-reqs
(macOS preset to add, Linux/X11Debug likely renamed on first 4.x
save, Docker image tag) and how to plug Butler back in later.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -0,0 +1,171 @@
+name: Build Puzzle Quest
+
+on:
+  push:
+    branches: [dev, main]
+  pull_request:
+    branches: [dev, main]
+  workflow_dispatch:
+
+env:
+  GODOT_VERSION: "4.6"
+  GODOT_IMAGE: "barichello/godot-ci:4.6"
+
+jobs:
+  # ---------------------------------------------------------------------------
+  # 1. GDScript validation — parse every script and fail on errors / warnings.
+  # ---------------------------------------------------------------------------
+  validate:
+    name: Validate GDScript
+    runs-on: ubuntu-latest
+    container:
+      image: barichello/godot-ci:4.6
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Import project (parses every .gd / .tscn)
+        run: |
+          godot --headless --import 2>&1 | tee /tmp/godot-import.log || true
+
+      - name: Fail on parse / script errors
+        run: |
+          if grep -qE "SCRIPT ERROR|Parse Error|ERROR: .*\.gd" /tmp/godot-import.log; then
+            echo "::error::GDScript errors detected during import"
+            grep -E "SCRIPT ERROR|Parse Error|ERROR: .*\.gd" /tmp/godot-import.log
+            exit 1
+          fi
+
+      - name: Upload import cache
+        uses: actions/upload-artifact@v3
+        with:
+          name: godot-import-cache
+          path: .godot
+          retention-days: 1
+
+  # ---------------------------------------------------------------------------
+  # 2. Desktop exports (Windows / Linux / macOS) — runs in parallel.
+  #    macOS preset must be added in the Godot editor before this matrix entry
+  #    can succeed (export_presets.cfg currently has none).
+  # ---------------------------------------------------------------------------
+  export-desktop:
+    name: Export ${{ matrix.platform }}
+    needs: validate
+    runs-on: ubuntu-latest
+    container:
+      image: barichello/godot-ci:4.6
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: Windows
+            preset: WindowsDebug
+            output: releases/windows/Puzzle-Quest.exe
+            artifact_path: releases/windows
+          - platform: Linux
+            preset: Linux/X11Debug
+            output: releases/linux/Puzzle-Quest.x86_64
+            artifact_path: releases/linux
+          - platform: macOS
+            preset: macOS
+            output: releases/macos/Puzzle-Quest.zip
+            artifact_path: releases/macos
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Restore import cache
+        uses: actions/download-artifact@v3
+        with:
+          name: godot-import-cache
+          path: .godot
+
+      - name: Prepare output dir
+        run: mkdir -p "${{ matrix.artifact_path }}"
+
+      - name: Export ${{ matrix.platform }}
+        run: godot --headless --export-debug "${{ matrix.preset }}" "${{ matrix.output }}"
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: PuzzleQuest-${{ matrix.platform }}
+          path: ${{ matrix.artifact_path }}
+          if-no-files-found: error
+          retention-days: 14
+
+  # ---------------------------------------------------------------------------
+  # 3. Android export — needs JDK + Android SDK on top of the Godot image.
+  #    Provide ANDROID_KEYSTORE_BASE64 as a Gitea secret for a stable signature;
+  #    otherwise a fresh debug keystore is generated on each run.
+  # ---------------------------------------------------------------------------
+  export-android:
+    name: Export Android
+    needs: validate
+    runs-on: ubuntu-latest
+    container:
+      image: barichello/godot-ci:4.6
+    env:
+      ANDROID_HOME: /opt/android-sdk
+      JAVA_HOME: /usr/lib/jvm/java-17-openjdk-amd64
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install JDK 17 + unzip
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends openjdk-17-jdk wget unzip
+
+      - name: Install Android command-line tools + SDK
+        run: |
+          mkdir -p "$ANDROID_HOME/cmdline-tools"
+          wget -q https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip -O /tmp/cmdline.zip
+          unzip -q /tmp/cmdline.zip -d "$ANDROID_HOME/cmdline-tools"
+          mv "$ANDROID_HOME/cmdline-tools/cmdline-tools" "$ANDROID_HOME/cmdline-tools/latest"
+          yes | "$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager" --licenses >/dev/null
+          "$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager" \
+            "platform-tools" "platforms;android-34" "build-tools;34.0.0" >/dev/null
+
+      - name: Provision debug keystore
+        env:
+          ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+        run: |
+          if [ -n "$ANDROID_KEYSTORE_BASE64" ]; then
+            echo "$ANDROID_KEYSTORE_BASE64" | base64 -d > /root/debug.keystore
+          else
+            keytool -keyalg RSA -genkeypair -alias androiddebugkey -keypass android \
+              -keystore /root/debug.keystore -storepass android \
+              -dname "CN=Android Debug,O=Android,C=US" -validity 9999
+          fi
+          sed -i 's@keystore/debug=".*"@keystore/debug="/root/debug.keystore"@g' export_presets.cfg
+
+      - name: Write Godot editor settings (Android SDK / JDK paths)
+        run: |
+          mkdir -p ~/.config/godot
+          cat > ~/.config/godot/editor_settings-4.tres <<EOF
+          [gd_resource type="EditorSettings" format=3]
+          [resource]
+          export/android/android_sdk_path = "/opt/android-sdk"
+          export/android/java_sdk_path = "/usr/lib/jvm/java-17-openjdk-amd64"
+          export/android/debug_keystore = "/root/debug.keystore"
+          export/android/debug_keystore_user = "androiddebugkey"
+          export/android/debug_keystore_pass = "android"
+          EOF
+
+      - name: Restore import cache
+        uses: actions/download-artifact@v3
+        with:
+          name: godot-import-cache
+          path: .godot
+
+      - name: Prepare output dir
+        run: mkdir -p releases/android
+
+      - name: Export Android APK
+        run: godot --headless --export-debug "AndroidDebug" "releases/android/Puzzle-Quest.apk"
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: PuzzleQuest-Android
+          path: releases/android
+          if-no-files-found: error
+          retention-days: 14