新增农户功能升级：身份证OCR/OSS上传、头像采集、同名村检测、Region热度排序及表单体验优化

- Region 表新增热度列，热门省份优先显示
- 区县下拉按地级市分组、已录区县优先、支持全省搜索
- 组选择内置一组至二十组
- 银行卡号独立行+粗体预览，开户行独立行
- 新增农户类型：农户/个体户/合作社/经营集体/公司
- 身份证正反面支持高拍仪/摄像头OCR与手机扫码上传，附件存本地/OSS
- 新增农户头像采集组件（摄像头/本地上传），预留人脸识别收购扩展
- 同名村弹窗提醒（防选错乡镇）
- 编辑窗体禁止遮罩/Esc误关，整体加宽适配高频操作
- 修复二维码局域网手机无法访问（监听0.0.0.0、局域网IP识别、Vite代理兜底）

backend/AgriculturalPlatform.Api/Dtos/DashboardDtos.cs

@@ -0,0 +1,35 @@
+namespace AgriculturalPlatform.Api.Dtos;
+
+/// <summary>大屏概览 KPI（按日期区间统计）</summary>
+public record OverviewDto(
+    decimal Amount, int Orders, decimal NetWeight, decimal Paid,
+    decimal AvgPrice, int FarmerCount, int WeighingCount);
+
+/// <summary>趋势点</summary>
+public record TrendPoint(string Date, decimal Amount, decimal NetWeight);
+
+/// <summary>占比点</summary>
+public record RatioPoint(string Name, decimal Value);
+
+/// <summary>农户收购金额排行点</summary>
+public record FarmerTopPoint(int FarmerId, string Name, decimal Amount, int Count, decimal NetWeight);
+
+/// <summary>站点对比点</summary>
+public record StationPoint(int OrgId, string Name, decimal Amount, int Count, decimal NetWeight);
+
+/// <summary>收购单价排行点（按品种平均单价）</summary>
+public record PriceTopPoint(string Name, decimal AvgPrice, decimal NetWeight, int Count);
+
+/// <summary>农户收入排行点（收入 = 区间收购金额，含已付）</summary>
+public record IncomeTopPoint(int FarmerId, string Name, decimal Amount, decimal Paid, int Count);
+
+/// <summary>实时过磅（进行中的收购单）</summary>
+public record RealtimeWeighing(
+    int Id, string OrderNo, string FarmerName, string ProductName,
+    string Status, decimal GrossWeight, DateTime WeighInAt);
+
+/// <summary>天气信息</summary>
+public record WeatherInfo(
+    string City, string Region, string Text, string Icon,
+    decimal TempC, decimal FeelsLike, decimal Humidity, string Wind,
+    decimal TodayMin, decimal TodayMax, DateTime UpdateTime, string Source);