ci(desktop): produce macOS .dmg and Windows NSIS installer

Splits the matrix into per-OS jobs so each can do native packaging:
- macOS: builds the .app, then wraps it in a drag-to-Applications .dmg
  via hdiutil. Also keeps a plain .zip for users who prefer it.
- Windows: installs NSIS via choco, runs 'wails build -nsis' which
  generates both the standalone .exe and a Windows installer .exe.

Release artifacts now include all four:
- csvops-desktop-macos-universal.dmg
- csvops-desktop-macos-universal.zip
- csvops-desktop-windows-amd64.zip
- csvops-desktop-windows-amd64-installer.exe

Author: maherelgamil

.github/workflows/desktop-release.yml

@@ -11,34 +11,16 @@ concurrency:
   cancel-in-progress: false
 
 jobs:
-  build:
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - os: macos-latest
-            platform: darwin/universal
-            artifact_name: csvops-desktop-macos-universal
-            artifact_glob: 'desktop/build/bin/*.app'
-            archive_cmd: 'cd desktop/build/bin && zip -r ../../../csvops-desktop-macos-universal.zip *.app'
-            archive_path: csvops-desktop-macos-universal.zip
-          - os: windows-latest
-            platform: windows/amd64
-            artifact_name: csvops-desktop-windows-amd64
-            artifact_glob: 'desktop/build/bin/*.exe'
-            archive_cmd: 'powershell Compress-Archive -Path desktop/build/bin/*.exe -DestinationPath csvops-desktop-windows-amd64.zip'
-            archive_path: csvops-desktop-windows-amd64.zip
-    runs-on: ${{ matrix.os }}
-
+  build-macos:
+    runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - uses: actions/setup-go@v5
         with:
-          # The desktop module pins go 1.23 in its go.mod but Wails needs the
-          # Darwin LC_UUID fix from Go 1.24+; pin explicitly here.
+          # Wails needs the Darwin LC_UUID fix from Go 1.24+.
           go-version: '1.24'
 
       - uses: actions/setup-node@v4
@@ -47,35 +29,90 @@ jobs:
 
       - name: Install Wails
         run: go install github.com/wailsapp/wails/v2/cmd/wails@latest
-        shell: bash
 
-      - name: Add GOPATH/bin to PATH (unix)
-        if: runner.os != 'Windows'
+      - name: Add GOPATH/bin to PATH
         run: echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
+
+      - name: Build .app
+        working-directory: desktop
+        run: wails build -platform darwin/universal -clean
+
+      - name: Build .dmg
+        run: |
+          mkdir -p dmg-staging
+          cp -R desktop/build/bin/csvops-desktop.app dmg-staging/
+          ln -s /Applications dmg-staging/Applications
+          hdiutil create \
+            -volname "csvops" \
+            -srcfolder dmg-staging \
+            -ov -format UDZO \
+            csvops-desktop-macos-universal.dmg
+
+      - name: Also produce a plain zip
+        run: |
+          cd desktop/build/bin && zip -r ../../../csvops-desktop-macos-universal.zip csvops-desktop.app
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: macos
+          path: |
+            csvops-desktop-macos-universal.dmg
+            csvops-desktop-macos-universal.zip
+
+  build-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.24'
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install Wails
+        run: go install github.com/wailsapp/wails/v2/cmd/wails@latest
         shell: bash
 
-      - name: Add GOPATH/bin to PATH (windows)
-        if: runner.os == 'Windows'
+      - name: Add GOPATH/bin to PATH
         run: echo "$(go env GOPATH)\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
         shell: pwsh
 
-      - name: Build
+      - name: Install NSIS
+        run: choco install -y nsis
+        shell: pwsh
+
+      - name: Build .exe + NSIS installer
         working-directory: desktop
-        run: wails build -platform ${{ matrix.platform }} -clean
+        run: wails build -platform windows/amd64 -clean -nsis
         shell: bash
 
-      - name: Archive
-        run: ${{ matrix.archive_cmd }}
+      - name: Stage Windows artifacts
         shell: bash
+        run: |
+          # The plain exe (portable)
+          powershell Compress-Archive -Path desktop/build/bin/*.exe -DestinationPath csvops-desktop-windows-amd64.zip
+          # The NSIS installer (created under build/bin/)
+          if ls desktop/build/bin/*-installer.exe 1> /dev/null 2>&1; then
+            cp desktop/build/bin/*-installer.exe csvops-desktop-windows-amd64-installer.exe
+          fi
 
-      - name: Upload artifact
+      - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
-          name: ${{ matrix.artifact_name }}
-          path: ${{ matrix.archive_path }}
+          name: windows
+          path: |
+            csvops-desktop-windows-amd64.zip
+            csvops-desktop-windows-amd64-installer.exe
+          if-no-files-found: warn
 
   release:
-    needs: build
+    needs: [build-macos, build-windows]
     runs-on: ubuntu-latest
     permissions:
       contents: write