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/Models/Farmer.cs

@@ -0,0 +1,62 @@
+namespace AgriculturalPlatform.Api.Models;
+
+/// <summary>农户档案</summary>
+public class Farmer
+{
+    public int Id { get; set; }
+
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>身份证号（唯一）</summary>
+    public string IdCard { get; set; } = string.Empty;
+
+    public string Gender { get; set; } = string.Empty;
+
+    /// <summary>农户类型：农户/个体户/合作社/经营集体/公司</summary>
+    public string FarmerType { get; set; } = "农户";
+
+    public string Phone { get; set; } = string.Empty;
+
+    /// <summary>所在省</summary>
+    public string Province { get; set; } = string.Empty;
+
+    /// <summary>所在县（区）</summary>
+    public string County { get; set; } = string.Empty;
+
+    /// <summary>所在乡镇（街道）</summary>
+    public string Township { get; set; } = string.Empty;
+
+    /// <summary>所在村/合作社</summary>
+    public string Village { get; set; } = string.Empty;
+
+    /// <summary>所在组</summary>
+    public string GroupName { get; set; } = string.Empty;
+
+    public string Address { get; set; } = string.Empty;
+
+    /// <summary>开户银行</summary>
+    public string BankName { get; set; } = string.Empty;
+
+    /// <summary>银行卡号（付款用）</summary>
+    public string BankAccount { get; set; } = string.Empty;
+
+    /// <summary>身份证正面附件地址（阿里云 OSS / 本地存储 key 或 URL）</summary>
+    public string IdCardFrontUrl { get; set; } = string.Empty;
+
+    /// <summary>身份证反面附件地址（阿里云 OSS / 本地存储 key 或 URL）</summary>
+    public string IdCardBackUrl { get; set; } = string.Empty;
+
+    /// <summary>农户头像附件地址（摄像头/手机采集，未来用于人脸识别收购）</summary>
+    public string AvatarUrl { get; set; } = string.Empty;
+
+    /// <summary>信用评分（0-100）</summary>
+    public int CreditScore { get; set; } = 80;
+
+    public FarmerStatus Status { get; set; } = FarmerStatus.Active;
+
+    public string Notes { get; set; } = string.Empty;
+
+    public DateTime CreatedAt { get; set; } = DateTime.Now;
+
+    public DateTime? UpdatedAt { get; set; }
+}