Add Electron MacOS desktop app support

- Added electron/main.js for desktop wrapper
- Configured electron-builder for DMG/ZIP builds
- Updated package.json with electron scripts and build config
- Removed unused backend dependencies (better-sqlite3, express)
- Updated .gitignore for build artifacts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: dsactivi

.gitignore

@@ -3,6 +3,8 @@ node_modules/
 
 # Build output
 dist/
+build/
+dist-electron/
 
 # Data
 data/

electron/main.js

@@ -0,0 +1,103 @@
+const { app, BrowserWindow, Menu } = require('electron');
+const path = require('path');
+
+let mainWindow;
+
+function createWindow() {
+  mainWindow = new BrowserWindow({
+    width: 1400,
+    height: 900,
+    minWidth: 800,
+    minHeight: 600,
+    titleBarStyle: 'hiddenInset',
+    trafficLightPosition: { x: 15, y: 15 },
+    webPreferences: {
+      nodeIntegration: false,
+      contextIsolation: true,
+    },
+    icon: path.join(__dirname, 'icon.png'),
+  });
+
+  // Load the built app
+  if (process.env.NODE_ENV === 'development') {
+    mainWindow.loadURL('http://localhost:5173');
+    mainWindow.webContents.openDevTools();
+  } else {
+    mainWindow.loadFile(path.join(__dirname, '../build/index.html'));
+  }
+
+  mainWindow.on('closed', () => {
+    mainWindow = null;
+  });
+}
+
+// Create menu
+const template = [
+  {
+    label: app.name,
+    submenu: [
+      { role: 'about' },
+      { type: 'separator' },
+      { role: 'services' },
+      { type: 'separator' },
+      { role: 'hide' },
+      { role: 'hideOthers' },
+      { role: 'unhide' },
+      { type: 'separator' },
+      { role: 'quit' },
+    ],
+  },
+  {
+    label: 'Edit',
+    submenu: [
+      { role: 'undo' },
+      { role: 'redo' },
+      { type: 'separator' },
+      { role: 'cut' },
+      { role: 'copy' },
+      { role: 'paste' },
+      { role: 'selectAll' },
+    ],
+  },
+  {
+    label: 'View',
+    submenu: [
+      { role: 'reload' },
+      { role: 'forceReload' },
+      { role: 'toggleDevTools' },
+      { type: 'separator' },
+      { role: 'resetZoom' },
+      { role: 'zoomIn' },
+      { role: 'zoomOut' },
+      { type: 'separator' },
+      { role: 'togglefullscreen' },
+    ],
+  },
+  {
+    label: 'Window',
+    submenu: [
+      { role: 'minimize' },
+      { role: 'zoom' },
+      { type: 'separator' },
+      { role: 'front' },
+    ],
+  },
+];
+
+app.whenReady().then(() => {
+  const menu = Menu.buildFromTemplate(template);
+  Menu.setApplicationMenu(menu);
+  createWindow();
+
+  app.on('activate', () => {
+    if (BrowserWindow.getAllWindows().length === 0) {
+      createWindow();
+    }
+  });
+});
+
+app.on('window-all-closed', () => {
+  if (process.platform !== 'darwin') {
+    app.quit();
+  }
+});