Add macOS build job to app build workflow

Builds a universal binary (aarch64 + x86_64) targeting both Apple
Silicon and Intel Macs. Produces .dmg and .app.tar.gz artifacts,
uploaded to a separate Gitea release tagged with -mac suffix.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/build-app.yml

@@ -119,6 +119,90 @@ jobs:
               "${GITEA_URL}/api/v1/repos/${REPO}/releases/${RELEASE_ID}/assets?name=${filename}"
           done
 
+  build-macos:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Compute version
+        id: version
+        run: |
+          COMMIT_COUNT=$(git rev-list --count HEAD)
+          VERSION="0.1.${COMMIT_COUNT}"
+          echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
+          echo "Computed version: ${VERSION}"
+
+      - name: Set app version
+        run: |
+          VERSION="${{ steps.version.outputs.VERSION }}"
+          sed -i '' "s/\"version\": \".*\"/\"version\": \"${VERSION}\"/" app/src-tauri/tauri.conf.json
+          sed -i '' "s/\"version\": \".*\"/\"version\": \"${VERSION}\"/" app/package.json
+          sed -i '' "s/^version = \".*\"/version = \"${VERSION}\"/" app/src-tauri/Cargo.toml
+          echo "Patched version to ${VERSION}"
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: aarch64-apple-darwin,x86_64-apple-darwin
+
+      - name: Rust cache
+        uses: swatinem/rust-cache@v2
+        with:
+          workspaces: "./app/src-tauri -> target"
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+
+      - name: Install frontend dependencies
+        working-directory: ./app
+        run: npm ci
+
+      - name: Install Tauri CLI
+        working-directory: ./app
+        run: npx tauri --version || npm install @tauri-apps/cli
+
+      - name: Build Tauri app (universal)
+        working-directory: ./app
+        run: npx tauri build --target universal-apple-darwin
+
+      - name: Collect artifacts
+        run: |
+          mkdir -p artifacts
+          cp app/src-tauri/target/universal-apple-darwin/release/bundle/dmg/*.dmg artifacts/ 2>/dev/null || true
+          cp app/src-tauri/target/universal-apple-darwin/release/bundle/macos/*.app.tar.gz artifacts/ 2>/dev/null || true
+          ls -la artifacts/
+
+      - name: Upload to Gitea release
+        if: gitea.event_name == 'push'
+        env:
+          TOKEN: ${{ secrets.REGISTRY_TOKEN }}
+        run: |
+          TAG="v${{ steps.version.outputs.VERSION }}-mac"
+          # Create release
+          curl -s -X POST \
+            -H "Authorization: token ${TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "{\"tag_name\": \"${TAG}\", \"name\": \"Triple-C v${{ steps.version.outputs.VERSION }} (macOS)\", \"body\": \"Automated build from commit ${{ gitea.sha }}\"}" \
+            "${GITEA_URL}/api/v1/repos/${REPO}/releases" > release.json
+          RELEASE_ID=$(cat release.json | grep -o '"id":[0-9]*' | head -1 | grep -o '[0-9]*')
+          echo "Release ID: ${RELEASE_ID}"
+          # Upload each artifact
+          for file in artifacts/*; do
+            [ -f "$file" ] || continue
+            filename=$(basename "$file")
+            echo "Uploading ${filename}..."
+            curl -s -X POST \
+              -H "Authorization: token ${TOKEN}" \
+              -H "Content-Type: application/octet-stream" \
+              --data-binary "@${file}" \
+              "${GITEA_URL}/api/v1/repos/${REPO}/releases/${RELEASE_ID}/assets?name=${filename}"
+          done
+
   build-windows:
     runs-on: windows-latest
     defaults: