feat: Cupertino滚轮选择器 + 品牌更名 + UI全面优化

- 日期/时间/次数选择器统一改为底部弹出Cupertino滚轮，无单位标签，双横线选区
- App更名为"小脉健康"，副标题"血管病患者的AI健康管理助手"
- 健康仪表盘及侧边栏移除体重指标，侧边栏背景改为蓝白渐变
- 健康档案按钮移入功能入口网格，与其他入口样式统一
- 记数据智能体配色改为绿色渐变(#A1FFCE→#69DB8F)
- 隐私协议/关于页从Text改为MarkdownBody正确渲染
- 运动计划/饮食记录卡片添加边框和阴影
- 服药次数从chip改为滚轮选择器
- 日期显示格式统一为空格分隔(1999 01 01)
- 健康档案页背景改为纯白

start-dev.bat

@@ -14,16 +14,13 @@ echo [1/2] Starting PostgreSQL...
 if errorlevel 1 (echo   PG already running) else (echo   PG started)
 echo.
 
-echo [2/3] Starting .NET Backend...
+echo [2/2] Starting .NET Backend...
 start "Backend" cmd /k "cd /d D:\health_project\backend\src\Health.WebApi && dotnet run"
 echo   Waiting for backend...
 timeout /t 8 /nobreak >nul
 echo.
 
-echo [3/3] Setup phone connection...
-adb reverse tcp:5000 tcp:5000 2>nul
-if errorlevel 1 (echo   USB not connected, skip) else (echo   Phone -> PC forwarding OK)
-echo.
-
-echo All done. Open the app on your phone.
+echo All done. Phone connects via WiFi to this PC.
+echo If your PC IP changed, rebuild app with:
+echo   flutter run -d ^<device^> --dart-define=API_BASE_URL=http://^<pc-ip^>:5000
 pause