fix: collect portable exe by pattern instead of hardcoded filename

electron-builder produces 'OmniRoute 1.6.9.exe' (with version) as the
portable exe, not 'OmniRoute.exe'. The hardcoded check failed, returning
exit code 1 and breaking every Windows build in the release workflow.

Now finds the portable exe by excluding 'Setup' (NSIS installer) and
blockmap files, then copies it as OmniRoute.exe for the release assets.

.github/workflows/electron-release.yml

@@ -112,8 +112,13 @@ jobs:
           done
           # Windows: also copy portable standalone exe
           if [ "${{ matrix.platform }}" = "windows" ]; then
-            [ -f "OmniRoute.exe" ] && cp OmniRoute.exe ../../release-assets/
+            for file in *.exe; do
+              # Skip the NSIS installer (contains "Setup") and blockmap files
+              case "$file" in *Setup*|*.blockmap) continue ;; esac
+              [ -f "$file" ] && cp "$file" "../../release-assets/OmniRoute.exe"
+            done
           fi
+          ls -la ../../release-assets/ || true
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v4