Convert Windows app to Electron and add Android Capacitor app with CI builds

.github/workflows/build-electron-app.yml

@@ -0,0 +1,69 @@
+name: Build Electron Windows App
+
+on:
+  push:
+    branches:
+      - main
+      - master
+    paths:
+      - windows-app/**
+      - chat/public/**
+      - .github/workflows/build-electron-app.yml
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  actions: read
+
+jobs:
+  build-windows:
+    name: Build Electron App (Windows)
+    runs-on: windows-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: windows-app/package-lock.json
+
+      - name: Install dependencies
+        run: npm install
+        working-directory: windows-app
+
+      - name: Build Electron app
+        run: npm run build:win
+        working-directory: windows-app
+        env:
+          BACKEND_BASE_URL: ${{ secrets.BACKEND_BASE_URL }}
+
+      - name: Upload Windows artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: shopify-ai-electron-windows
+          path: windows-app/dist/*.exe
+          retention-days: 7
+
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: electron-app-${{ github.sha }}
+          release_name: ShopifyAI Electron App ${{ github.sha }}
+          draft: false
+          prerelease: false
+
+      - name: Upload Release Asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: windows-app/dist/ShopifyAI Desktop Setup 0.1.0.exe
+          asset_name: ShopifyAI-Desktop-Setup-0.1.0.exe
+          asset_content_type: application/octet-stream