fix: 全面修复 - 实时通讯、报告AI流程、健康概览、用药运动提醒

- SignalR Hub消息持久化+防重复+跨端广播
- 报告VLM+LLM真实AI流程(验证→提取→解读)
- 医生审核页重构(严重程度/建议模板/综合评语)
- 健康概览五合一趋势图(fl_chart+指标切换)
- 用药提醒时区修复+跨午夜+过期提醒
- 运动打卡DayOfWeek映射修复+计划覆盖查询
- 体重与其他四指标同级(Abnormal检查/确认卡牌)
- AI Agent支持多种类多时段批量录入
- 删除硬编码假数据(张三/假医生/假AI解读)
- 随访/报告审核数据链路全部打通

backend/src/Health.Infrastructure/Data/data_seeder.cs

@@ -7,13 +7,13 @@ public static class DataSeeder
 {
     public static async Task SeedAsync(AppDbContext db)
     {
-        // 种子医生数据
+        // 种子医生数据（固定 ID，与客户端 fallback 保持一致）
         if (!db.Doctors.Any())
         {
             db.Doctors.AddRange(
                 new Doctor
                 {
-                    Id = Guid.NewGuid(),
+                    Id = Guid.Parse("ef0953c9-eb63-4d03-b6d7-050a1897d4a3"),
                     Name = "王建国",
                     Title = "主任医师",
                     Department = "心血管内科",
@@ -22,7 +22,7 @@ public static class DataSeeder
                 },
                 new Doctor
                 {
-                    Id = Guid.NewGuid(),
+                    Id = Guid.Parse("d4148733-b538-4398-af17-0c7592fc0c2d"),
                     Name = "李芳",
                     Title = "副主任医师",
                     Department = "营养科",
@@ -31,7 +31,7 @@ public static class DataSeeder
                 },
                 new Doctor
                 {
-                    Id = Guid.NewGuid(),
+                    Id = Guid.Parse("468b82e2-d95a-4436-bff6-a50eecf99a66"),
                     Name = "张明",
                     Title = "主任医师",
                     Department = "心脏康复科",