CI: use tauri-action for branch builds (fixes missing bundles)

The manual 'cargo tauri build' wasn't generating .dmg/.app properly
without code signing. tauri-action handles ad-hoc signing and all
bundle types correctly (same as release.yml).

Uploads entire bundle/ directory as artifact.

Author: Paururo

.github/workflows/build-gui-branch.yml

@@ -1,5 +1,8 @@
 name: Build & Test GUI (branch)
 
+permissions:
+  contents: write
+
 on:
   push:
     branches: [v1.1.1]
@@ -103,39 +106,21 @@ jobs:
           }
           $json | ConvertTo-Json -Depth 100 | Set-Content -Encoding utf8 $confPath
 
+      # Use tauri-action (same as release.yml) — handles signing, bundling, etc.
+      # tagName is empty so it won't create a release, just builds
       - name: Build Tauri app
+        uses: tauri-apps/tauri-action@v0
         env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           APPLE_SIGNING_IDENTITY: ${{ startsWith(matrix.platform, 'macos') && '-' || '' }}
-        run: |
-          cd src-tauri
-          cargo install tauri-cli --version "^2" --locked || true
-          cd ..
-          cargo tauri build ${{ matrix.args }}
-
-      - name: Upload artifacts (macOS .dmg)
-        if: startsWith(matrix.platform, 'macos')
-        uses: actions/upload-artifact@v4
         with:
-          name: get_MNV-${{ matrix.label }}
-          path: src-tauri/target/${{ matrix.rust_target }}/release/bundle/dmg/*.dmg
-          retention-days: 14
+          args: ${{ matrix.args }}
+          projectPath: src-tauri
 
-      - name: Upload artifacts (Linux .deb + .AppImage)
-        if: matrix.platform == 'ubuntu-22.04'
-        uses: actions/upload-artifact@v4
-        with:
-          name: get_MNV-${{ matrix.label }}
-          path: |
-            src-tauri/target/${{ matrix.rust_target }}/release/bundle/deb/*.deb
-            src-tauri/target/${{ matrix.rust_target }}/release/bundle/appimage/*.AppImage
-          retention-days: 14
-
-      - name: Upload artifacts (Windows .msi + .exe)
-        if: matrix.platform == 'windows-latest'
+      - name: Upload all bundles
         uses: actions/upload-artifact@v4
         with:
           name: get_MNV-${{ matrix.label }}
-          path: |
-            src-tauri/target/${{ matrix.rust_target }}/release/bundle/msi/*.msi
-            src-tauri/target/${{ matrix.rust_target }}/release/bundle/nsis/*.exe
+          path: src-tauri/target/${{ matrix.rust_target }}/release/bundle/**/*
           retention-days: 14
+          if-no-files-found: error