Add macOS app preparation and signing steps

Added steps to prepare and sign the macOS app, and zip it for distribution.

.github/workflows/tauri-release.yml

@@ -48,18 +48,31 @@ jobs:
       - name: Build Tauri app
         run: npm run tauri build
 
+      - name: Prepare macOS app
+        if: matrix.os == 'macos-latest'
+        run: |
+          APP_PATH=$(find src-tauri/target/release/bundle/macos -maxdepth 1 -name "*.app")
+
+          echo "App path: $APP_PATH"
+
+          # Ad-hoc sign (no Apple account needed)
+          codesign --deep --force --sign - "$APP_PATH"
+
+          # Zip correctly (VERY important for macOS)
+          ditto -c -k --keepParent "$APP_PATH" Tauri-macOS.zip
+
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
           name: tauri-build-${{ matrix.os }}
           path: |
-            src-tauri/target/release/bundle/**/!(node_modules)/
             src-tauri/target/release/bundle/**/*.AppImage
             src-tauri/target/release/bundle/**/*.dmg
             src-tauri/target/release/bundle/**/*.msi
             src-tauri/target/release/bundle/**/*.exe
             src-tauri/target/release/bundle/**/*.deb
             src-tauri/target/release/bundle/**/*.rpm
+            Tauri-macOS.zip
 
   release:
     name: Upload to GitHub Release