fix: specify the app-id and desktop file name

opt: add application and polkit

opt: add polkit

.github/workflows/flutter-nightly.yml

@@ -1511,7 +1511,7 @@ jobs:
             pushd flatpak
             git clone https://github.com/flathub/shared-modules.git --depth=1
             flatpak-builder --user --force-clean --repo=repo ./build ./rustdesk.json
-            flatpak build-bundle ./repo rustdesk-${{ env.VERSION }}-${{ matrix.job.target }}.flatpak org.rustdesk.rustdesk
+            flatpak build-bundle ./repo rustdesk-${{ env.VERSION }}-${{ matrix.job.target }}.flatpak com.rustdesk.RustDesk
 
       - name: Publish flatpak package
         uses: softprops/action-gh-release@v1