Add Route Context

为Flutter页面添加路由上下文记录，使AI助手能理解用户当前查看的页面参数。

Workflow

1. Analyze Target File

Read the target file and identify:

• State class name
• Parameter variable (e.g., _selectedDate, _userId)
• Parameter change method (e.g., _onDateChanged)
• Initialization method (e.g., initState, _initializeService)

2. Add RouteHistoryManager Import