feat: 饮食记录逻辑重构 + 通知管理分隔线修复 + 多页面 UI 调整

- 饮食: 新增 DietCommentaryPolicy + diet_record_logic, 饮食记录逻辑抽取复用
- 通知管理: 分隔线改为仿通知中心样式, 跳过图标区域只留文字下方
- 侧边栏: 对话记录操作栏浮层修复 + 常用功能间距收紧
- 智能体: 欢迎卡片去 400ms 延迟 + 胶囊去阴影
- 后端: AI 会话仓库新增方法 + 饮食评论策略 + 健康记录规则调整
- 其他: api_client IP 适配 + 多页面 UI 微调 + 新增测试

backend/src/Health.Application/AI/AiConversationContracts.cs

@@ -48,6 +48,7 @@ public interface IAiConversationRepository
     Task<IReadOnlyList<ConversationMessage>> GetRecentMessagesAsync(Guid conversationId, int limit, CancellationToken ct);
     Task AddConversationAsync(Conversation conversation, CancellationToken ct);
     Task AddMessageAsync(ConversationMessage message, CancellationToken ct);
+    Task<int> DeleteLegacyDietCommentaryArtifactsAsync(Guid userId, string promptPrefix, CancellationToken ct);
     void Delete(Conversation conversation);
     Task SaveChangesAsync(CancellationToken ct);
 }

backend/src/Health.Application/AI/AiConversationService.cs

@@ -55,6 +55,10 @@ public sealed class AiConversationService(IAiConversationRepository conversation
 
     public async Task<IReadOnlyList<AiConversationDto>> ListAsync(Guid userId, CancellationToken ct)
     {
+        await _conversations.DeleteLegacyDietCommentaryArtifactsAsync(
+            userId,
+            DietCommentaryPolicy.LegacyPromptPrefix,
+            ct);
         var conversations = await _conversations.ListAsync(userId, ct);
         return conversations.Take(HistoryConversationLimit).Select(ToDto).ToList();
     }

backend/src/Health.Application/AI/DietCommentaryPolicy.cs

@@ -0,0 +1,35 @@
+using Health.Domain.Entities;
+using Health.Domain.Enums;
+
+namespace Health.Application.AI;
+
+public sealed record DietCommentaryFood(string Name, string Portion, int Calories);
+
+public static class DietCommentaryPolicy
+{
+    public const string LegacyPromptPrefix = "饮食记录页需要展示本餐建议。";
+
+    public const string SystemPrompt = """
+        你是健康管理 App 中的饮食建议助手。根据用户本餐食物和健康档案，直接输出2到3条简短建议。
+        每条建议12到22个汉字，不要问候，不要说“好的”“当然”“建议如下”，不要编号，不要使用 Markdown。
+        优先围绕控盐控油、蔬菜和蛋白质搭配、血糖血脂风险及份量控制。
+        不作诊断，不提供治疗、处方、停药或调药结论。语言简洁、专业、面向普通用户。
+        """;
+
+    public static string BuildFoodDescription(IEnumerable<DietCommentaryFood> foods) =>
+        string.Join("、", foods.Select(food =>
+            $"{Normalize(food.Name, 40)}（{Normalize(food.Portion, 30)}，{Math.Clamp(food.Calories, 0, 10000)}千卡）"));
+
+    public static bool IsLegacyArtifact(IEnumerable<ConversationMessage> messages)
+    {
+        var userMessages = messages.Where(message => message.Role == MessageRole.User).ToList();
+        return userMessages.Count > 0 &&
+               userMessages.All(message => message.Content.TrimStart().StartsWith(LegacyPromptPrefix, StringComparison.Ordinal));
+    }
+
+    private static string Normalize(string value, int maxLength)
+    {
+        var normalized = string.Join(' ', value.Trim().Split((char[]?)null, StringSplitOptions.RemoveEmptyEntries));
+        return normalized.Length > maxLength ? normalized[..maxLength] : normalized;
+    }
+}

backend/src/Health.Application/HealthRecords/HealthRecordRules.cs

@@ -9,7 +9,7 @@ public static class HealthRecordRules
     {
         HealthMetricType.BloodPressure => request.Systolic >= 140 || request.Diastolic >= 90 || request.Systolic <= 89 || request.Diastolic <= 59,
         HealthMetricType.HeartRate => request.Value > 100 || request.Value < 60,
-        HealthMetricType.Glucose => request.Value >= 7.0m || request.Value <= 3.8m,
+        HealthMetricType.Glucose => request.Value > 6.1m || request.Value < 3.9m,
         HealthMetricType.SpO2 => request.Value <= 94,
         HealthMetricType.Weight => false,
         _ => false
@@ -58,4 +58,3 @@ public static class HealthRecordRules
             throw new ValidationException($"{field}应在 {min}~{max} {unit} 之间，当前值 {value} 不合理");
     }
 }
-

backend/src/Health.Application/HealthRecords/HealthRecordService.cs

@@ -101,6 +101,7 @@ public sealed class HealthRecordService(
                 latest.Diastolic,
                 latest.Value,
                 latest.Unit,
+                latest.IsAbnormal,
                 latest.RecordedAt
             };
         }
@@ -140,7 +141,7 @@ public sealed class HealthRecordService(
                 ("心率偏高提醒", $"本次心率为 {record.Value:0.#} 次/分，高于参考范围。建议安静休息后复测。", "warning", "heart_rate"),
             HealthMetricType.HeartRate =>
                 ("心率偏低提醒", $"本次心率为 {record.Value:0.#} 次/分，低于参考范围。如伴明显不适，请及时就医。", "warning", "heart_rate"),
-            HealthMetricType.Glucose when record.Value >= 7.0m =>
+            HealthMetricType.Glucose when record.Value > 6.1m =>
                 ("血糖偏高提醒", $"本次血糖为 {record.Value:0.#} mmol/L，高于参考范围。请结合测量时段并按计划复测。", "warning", "glucose"),
             HealthMetricType.Glucose =>
                 ("血糖偏低提醒", $"本次血糖为 {record.Value:0.#} mmol/L，低于参考范围。请及时关注身体状况。", "critical", "glucose"),