ci: Gitea Actions release workflow for Linux + Windows desktop builds

Triggers on v* tags. Builds AppImage/deb/rpm on Linux runner,
MSI/NSIS on Windows runner, then creates a release with all assets.
Requires self-hosted runners registered in Gitea Actions.

.github/workflows/release.yml

@@ -0,0 +1,62 @@
+name: Release Desktop Apps
+
+on:
+  push:
+    tags: ['v*']
+
+jobs:
+  build-linux:
+    runs-on: linux
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with: { node-version: 20 }
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Install system deps
+        run: sudo apt-get update && sudo apt-get install -y libwebkit2gtk-4.1-dev libgtk-3-dev libappindicator3-dev librsvg2-dev patchelf
+      - name: Build frontend
+        run: cd web && npm ci && npm run build
+      - name: Build Tauri bundles
+        env:
+          NO_STRIP: "true"
+        run: cd web && npx tauri build
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: linux-bundles
+          path: |
+            web/src-tauri/target/release/bundle/appimage/*.AppImage
+            web/src-tauri/target/release/bundle/deb/*.deb
+            web/src-tauri/target/release/bundle/rpm/*.rpm
+
+  build-windows:
+    runs-on: windows
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with: { node-version: 20 }
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Build frontend
+        run: cd web; npm ci; npm run build
+      - name: Build Tauri bundles
+        run: cd web; npx tauri build
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-bundles
+          path: |
+            web/src-tauri/target/release/bundle/msi/*.msi
+            web/src-tauri/target/release/bundle/nsis/*.exe
+
+  release:
+    needs: [build-linux, build-windows]
+    runs-on: linux
+    steps:
+      - uses: actions/download-artifact@v4
+      - name: Create release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: |
+            linux-bundles/*
+            windows-bundles/*
+          generate_release_notes: true