feat: 用药提醒功能 + 移除医生相关页面

- 后端新增 GET /api/medications/reminders 接口
- 前端任务卡片区显示真实用药提醒
- 移除 DoctorListPage/DoctorChatPage 路由
- 移除"找医生"面板按钮
- 医生端另做 Web 页面

backend/src/Health.WebApi/Endpoints/remaining_endpoints.cs

@@ -101,6 +101,31 @@ public static class RemainingEndpoints
             await db.SaveChangesAsync(ct);
             return Results.Ok(new { code = 0, data = new { success = true }, message = (string?)null });
         });
+
+        // 获取待提醒的用药
+        group.MapGet("/reminders", async (HttpContext http, AppDbContext db, CancellationToken ct) =>
+        {
+            var userId = GetUserId(http);
+            var now = TimeOnly.FromDateTime(DateTime.Now);
+            var windowEnd = now.AddHours(1);
+            var meds = await db.Medications
+                .Where(m => m.UserId == userId && m.IsActive && m.TimeOfDay != null)
+                .ToListAsync(ct);
+            var due = meds.Where(m => m.TimeOfDay!.Any(t => t >= now && t <= windowEnd)).ToList();
+
+            // 检查今天是否已打卡
+            var today = DateOnly.FromDateTime(DateTime.Now);
+            var dueMeds = new List<object>();
+            foreach (var m in due)
+            {
+                var logged = await db.MedicationLogs.AnyAsync(l =>
+                    l.MedicationId == m.Id && l.CreatedAt >= today.ToDateTime(TimeOnly.MinValue) && l.Status == MedicationLogStatus.Taken, ct);
+                if (!logged)
+                    dueMeds.Add(new { m.Id, m.Name, m.Dosage, m.TimeOfDay });
+            }
+
+            return Results.Ok(new { code = 0, data = dueMeds, message = (string?)null });
+        });
     }
 
     public static void MapReportEndpoints(this WebApplication app)