fix: correct isDev detection logic for packaged Electron app

Changed isDev logic from OR to AND to properly detect production mode.
Previously: isDev = NODE_ENV === 'development' || !app.isPackaged
Now: isDev = NODE_ENV === 'development' && !app.isPackaged

This fixes the white screen issue where packaged .exe files were trying
to load from http://localhost:5173 instead of dist/index.html.

Fixes: #white-screen-on-launch

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

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

Author: KevenWMarkham

electron/main.cjs

@@ -6,7 +6,8 @@ let mainWindow = null
 let tray = null
 
 // Enable live reload for development
-const isDev = process.env.NODE_ENV === 'development' || !app.isPackaged
+// Check if running in development mode
+const isDev = process.env.NODE_ENV === 'development' && !app.isPackaged
 
 function createWindow() {
   mainWindow = new BrowserWindow({