Migrate from personal repo

.github/workflows/ci.yml

@@ -0,0 +1,47 @@
+name: Electron CI
+
+on:
+  push:
+    branches: ['**']
+  pull_request:
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          lfs: true
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - run: npm ci
+      - name: Check version tag
+        id: version_guard
+        if: github.ref == 'refs/heads/master'
+        shell: bash
+        run: |
+          VERSION=$(node -p "require('./package.json').version")
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
+          if git rev-parse "v$VERSION" >/dev/null 2>&1; then
+            echo "exists=true" >> $GITHUB_OUTPUT
+          else
+            echo "exists=false" >> $GITHUB_OUTPUT
+          fi
+      - name: Build (no publish)
+        if: github.ref != 'refs/heads/master'
+        run: npx electron-builder --publish=never
+      - name: Build & publish
+        if: github.ref == 'refs/heads/master' && steps.version_guard.outputs.exists == 'false'
+        run: npx electron-builder --publish=always
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Publish skipped
+        if: github.ref == 'refs/heads/master' && steps.version_guard.outputs.exists == 'true'
+        run: echo "Version already released — skipping publish"