feat: 用药打卡全面重构 - 按次追踪 + 独立打卡页 + 任务区汇总

- 后端用药提醒改为按次粒度(每个服药时间独立判断)
- 新增 per-dose 打卡/取消打卡 API
- 新增 MedicationCheckInPage 独立打卡页(每药每时间单独toggle)
- 用药列表删底部弹窗(编辑/停药),点药品直接进该药打卡页
- 任务区用药汇总为一行(过期待服已服)
- 支持隔天(EveryOtherDay)/每周频率判断
- 删历史对话功能(ConversationItem + conversationListProvider + UI)

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

@@ -132,7 +132,7 @@ public static class AiChatEndpoints
                             if (!string.IsNullOrEmpty(content))
                             {
                                 fullResponse += content;
-                                await SseWriteAsync(http, new { action = "answer", data = content, type = messageType }, ct);
+                                await SseWriteAsync(http, new { action = "answer", data = content, type = messageType, metadata = metadata.Count > 0 ? metadata : null }, ct);
                             }
                         }
                         catch (JsonException) { /* 跳过解析失败的 chunk */ }
@@ -338,11 +338,12 @@ public static class AiChatEndpoints
         AgentType.Report => ReportAgentHandler.Tools,
         AgentType.Exercise => ExerciseAgentHandler.Tools,
         AgentType.Unified => [
-            ..HealthDataAgentHandler.Tools,
-            ..DietAgentHandler.Tools,
-            ..MedicationAgentHandler.Tools,
-            ..ExerciseAgentHandler.Tools,
-            ..CommonAgentHandler.Tools,
+            HealthDataAgentHandler.RecordHealthDataTool,
+            CommonAgentHandler.QueryHealthRecordsTool,
+            DietAgentHandler.EstimateFoodTool,
+            MedicationAgentHandler.ManageMedicationTool,
+            ExerciseAgentHandler.ManageExerciseTool,
+            CommonAgentHandler.CheckArchiveTool,
         ],
         _ => CommonAgentHandler.Tools,
     };
@@ -442,6 +443,31 @@ public static class AiChatEndpoints
                         metadata["name"] = name.ToString();
                     if (resultDict.TryGetValue("dosage", out var dosage))
                         metadata["dosage"] = dosage.ToString();
+                    if (resultDict.TryGetValue("time", out var time))
+                        metadata["time"] = time.ToString();
+                    if (resultDict.TryGetValue("frequency", out var freq))
+                        metadata["frequency"] = freq.ToString();
+                    if (resultDict.TryGetValue("duration_days", out var dd2) && dd2 is int d2)
+                        metadata["duration_days"] = d2;
+                    if (resultDict.TryGetValue("start_date", out var sd))
+                        metadata["startDate"] = sd.ToString();
+                }
+                break;
+            case "manage_exercise":
+                messageType = "data_confirm";
+                if (resultDict != null)
+                {
+                    metadata["type"] = "exercise";
+                    metadata["value"] = "";
+                    if (resultDict.TryGetValue("exercise_type", out var et))
+                        metadata["value"] = et.ToString();
+                    if (resultDict.TryGetValue("duration_minutes", out var dm) && dm is int mins)
+                        metadata["unit"] = $"每天{mins}分钟";
+                    if (resultDict.TryGetValue("day_count", out var dc) && dc is int days)
+                        metadata["durationDays"] = days;
+                    if (resultDict.TryGetValue("success", out var es) && es is bool eb && eb)
+                        metadata["success"] = true;
+                    metadata["recordTime"] = DateTime.UtcNow.AddHours(8).ToString("MM月dd日 HH:mm");
                 }
                 break;
             case "estimate_food_text":