feat: AI 对话附件上下文解析 + 历史会话归档 + 多页面 UI 重构

- 后端: 新增 AttachmentContextBuilder 解析图片/PDF 摘要并拼入 LLM 上下文; ai_chat_endpoints 扩展附件接口; 新增 ReportAnalysisService - 前端: 新增历史会话页与 conversation_history_provider; chat 链路支持附件展示与回放 - UI: 重构 medication_checkin / notification_center / profile / health_drawer 等多页面 - 配置: api_client baseUrl 适配当前 WiFi IP
2026-07-06 12:44:59 +08:00
parent 4507083f3f
commit 7a93237069
38 changed files with 4165 additions and 1157 deletions
--- a/backend/src/Health.WebApi/Endpoints/ai_chat_endpoints.cs
+++ b/backend/src/Health.WebApi/Endpoints/ai_chat_endpoints.cs
@@ -28,6 +28,8 @@ public static class AiChatEndpoints
        app.MapGet("/api/ai/{agentType}/chat", async (
            string message,
            string? conversationId,
+            string? imageUrl,
+            string? pdfUrl,
            string token,
            string agentType,
            HttpContext http,
@@ -37,6 +39,7 @@ public static class AiChatEndpoints
            IAiToolExecutionService toolExecution,
            IAiWriteConfirmationStore confirmations,
            IAiConversationService conversations,
+            IAttachmentContextBuilder attachments,
            IPatientContextService patientContexts,
            CancellationToken ct) =>
        {
@@ -85,7 +88,24 @@ public static class AiChatEndpoints
            if (opened.Created)
                await SseWriteAsync(http, new { action = "conversation_id", data = activeConversationId.ToString() }, ct);

-            await conversations.AddUserMessageAsync(activeConversationId, message, ct);
+            // 附件解析（图片走 VLM、PDF 走 PdfPig），结果同时拼 LLM 上下文 + 持久化到 user message metadata
+            var attachment = await attachments.BuildAsync(imageUrl, pdfUrl, ct);
+            string? userMessageMetadataJson = null;
+            if (attachment != null)
+            {
+                userMessageMetadataJson = JsonSerializer.Serialize(new
+                {
+                    kind = attachment.Kind,
+                    category = attachment.Category,
+                    fileName = attachment.FileName,
+                    summary = attachment.Summary,
+                    imageUrl,
+                    pdfUrl,
+                }, JsonOpts);
+                await SseWriteAsync(http, new { action = "attachment", data = new { attachment.Kind, attachment.Category, attachment.Summary } }, ct);
+            }
+
+            await conversations.AddUserMessageAsync(activeConversationId, message, userMessageMetadataJson, ct);

            var urgentWarning = DetectUrgentRisk(message);
            if (!string.IsNullOrEmpty(urgentWarning))
@@ -99,6 +119,7 @@ public static class AiChatEndpoints
                    """;

                await conversations.AddAssistantMessageAsync(activeConversationId, urgentResponse, ct);
+                await TryUpdateConversationSummaryAsync(conversations, llmClient, userId.Value, activeConversationId, ct);

                await SseWriteAsync(http, new { action = "notice", message = "检测到可能的危险信号，优先给出就医提醒" }, ct);
                await SseWriteAsync(http, new { action = "answer", data = urgentResponse, type = "text" }, ct);
@@ -131,16 +152,46 @@ public static class AiChatEndpoints
                new() { Role = "system", Content = enhancedSystem },
            };

-            // 加载历史对话（最近 10 条）
+            // 加载历史对话（最近 12 条）
            var history = await conversations.GetRecentMessagesAsync(activeConversationId, 12, ct);

            foreach (var h in history)
            {
-                messages.Add(new ChatMessage
+                var role = h.Role == MessageRole.User.ToString() ? "user" : "assistant";
+                var content = h.Content;
+
+                // 历史 user message 如果带过附件，把附件摘要拼回 content，让 AI 能回忆起来
+                if (role == "user" && !string.IsNullOrWhiteSpace(h.MetadataJson))
                {
-                    Role = h.Role == MessageRole.User.ToString() ? "user" : "assistant",
-                    Content = h.Content,
-                });
+                    try
+                    {
+                        using var meta = JsonDocument.Parse(h.MetadataJson);
+                        if (meta.RootElement.TryGetProperty("summary", out var sumEl) &&
+                            sumEl.ValueKind == JsonValueKind.String)
+                        {
+                            var sum = sumEl.GetString();
+                            if (!string.IsNullOrWhiteSpace(sum) &&
+                                // 跳过本轮：本轮 user message 会在下面单独拼 LlmContent，避免重复
+                                h.Content != message)
+                            {
+                                content = $"[历史附件回忆：{sum}]\n{content}";
+                            }
+                        }
+                    }
+                    catch (JsonException) { /* 忽略损坏的 metadata */ }
+                }
+
+                messages.Add(new ChatMessage { Role = role, Content = content });
+            }
+
+            // 本轮如果带了附件，把完整识别结果拼到最后一条 user message 前
+            if (attachment != null && messages.Count > 0 && messages[^1].Role == "user")
+            {
+                messages[^1] = new ChatMessage
+                {
+                    Role = "user",
+                    Content = $"{attachment.LlmContent}\n{messages[^1].Content}",
+                };
            }

            // Tool Calling 循环
@@ -213,7 +264,16 @@ public static class AiChatEndpoints

            // 保存 AI 回复
            if (!string.IsNullOrEmpty(fullResponse))
-                await conversations.AddAssistantMessageAsync(activeConversationId, fullResponse, ct);
+            {
+                string? assistantMetadataJson = null;
+                if (metadata.Count > 0 || messageType != "text")
+                {
+                    metadata["messageType"] = messageType;
+                    assistantMetadataJson = JsonSerializer.Serialize(metadata, JsonOpts);
+                }
+                await conversations.AddAssistantMessageAsync(activeConversationId, fullResponse, assistantMetadataJson, ct);
+                await TryUpdateConversationSummaryAsync(conversations, llmClient, userId.Value, activeConversationId, ct);
+            }

            await SseWriteAsync(http, new { action = "status", data = completedNormally ? "done" : "error" }, ct);
            await http.Response.WriteAsync("data: [DONE]\n\n", ct);
@@ -265,6 +325,16 @@ public static class AiChatEndpoints
            return Results.Ok(new { code = 0, data = new { success = true }, message = (string?)null });
        });

+        // 一键清空当前用户的全部对话
+        app.MapDelete("/api/ai/conversations", async (HttpContext http, IAiConversationService conversations, CancellationToken ct) =>
+        {
+            var userId = GetUserId(http);
+            if (userId == null) return Results.Json(new { code = 40002 }, statusCode: 401);
+
+            var count = await conversations.DeleteAllAsync(userId.Value, ct);
+            return Results.Ok(new { code = 0, data = new { deleted = count }, message = (string?)null });
+        });
+
        app.MapPost("/api/ai/analyze-food-image", async (
            HttpRequest httpRequest,
            HttpContext http,
@@ -317,6 +387,116 @@ public static class AiChatEndpoints
        catch (Exception) { return null; }
    }

+    private static async Task TryUpdateConversationSummaryAsync(
+        IAiConversationService conversations,
+        DeepSeekClient llmClient,
+        Guid userId,
+        Guid conversationId,
+        CancellationToken ct)
+    {
+        try
+        {
+            var messages = await conversations.GetMessagesAsync(userId, conversationId, ct);
+            var transcript = BuildSummaryTranscript(messages);
+            if (string.IsNullOrWhiteSpace(transcript)) return;
+
+            var prompt = $"""
+                请把下面这次健康助手会话压缩成一个“对话记录标题”。
+
+                要求：
+                - 只输出标题，不要解释
+                - 8到18个汉字
+                - 优先保留用户真正要解决的问题、对象、最终动作或结论
+                - 像列表标题，不要像完整句子
+                - 不要写“本次会话、用户咨询、健康建议、进行分析、相关问题”
+                - 如果是上传图片/PDF，标题要体现附件内容和目的
+
+                示例：
+                - 早餐热量识别
+                - 血压偏高记录
+                - 服药时间调整
+                - 报告指标解读
+                - 跑步计划打卡
+
+                会话内容：
+                {transcript}
+                """;
+
+            var response = await llmClient.ChatAsync(
+                [
+                    new ChatMessage { Role = "system", Content = "你是对话标题生成助手，只输出短标题。" },
+                    new ChatMessage { Role = "user", Content = prompt },
+                ],
+                maxTokens: 120,
+                temperature: 0.2f,
+                ct: ct);
+
+            var summary = response.Choices?.FirstOrDefault()?.Message?.Content?.Trim();
+            if (string.IsNullOrWhiteSpace(summary)) return;
+
+            summary = Regex.Replace(summary, @"\s+", "");
+            summary = summary.Trim(' ', '。', '.', '"', '"', '\'', '“', '”', '：', ':');
+            summary = TrimSummaryPrefix(summary);
+            await conversations.UpdateSummaryAsync(conversationId, summary, ct);
+        }
+        catch
+        {
+            // 摘要只是历史列表体验增强，失败不能影响主对话。
+        }
+    }
+
+    private static string BuildSummaryTranscript(IReadOnlyList<AiConversationMessageDto> messages)
+    {
+        var sb = new System.Text.StringBuilder();
+        foreach (var message in messages.TakeLast(24))
+        {
+            var role = message.Role == MessageRole.User.ToString() ? "用户" : "AI";
+            var content = message.Content?.Trim() ?? "";
+
+            if (message.Role == MessageRole.User.ToString() &&
+                !string.IsNullOrWhiteSpace(message.MetadataJson))
+            {
+                try
+                {
+                    using var meta = JsonDocument.Parse(message.MetadataJson);
+                    if (meta.RootElement.TryGetProperty("summary", out var sumEl) &&
+                        sumEl.ValueKind == JsonValueKind.String)
+                    {
+                        var attachmentSummary = sumEl.GetString();
+                        if (!string.IsNullOrWhiteSpace(attachmentSummary))
+                            content = $"[附件：{attachmentSummary}] {content}";
+                    }
+                }
+                catch (JsonException) { }
+            }
+
+            if (string.IsNullOrWhiteSpace(content)) continue;
+            if (content.Length > 800) content = content[..800] + "...";
+            sb.Append(role).Append("：").AppendLine(content);
+            if (sb.Length > 6000) break;
+        }
+
+        return sb.ToString();
+    }
+
+    private static string TrimSummaryPrefix(string summary)
+    {
+        var prefixes = new[]
+        {
+            "本次会话",
+            "用户咨询",
+            "用户询问",
+            "健康建议",
+            "相关问题",
+        };
+        foreach (var prefix in prefixes)
+        {
+            if (summary.StartsWith(prefix, StringComparison.Ordinal))
+                return summary[prefix.Length..].Trim(' ', '：', ':', '，', ',');
+        }
+        return summary;
+    }
+
    // ── Agent / Tool 调度 ──

    /// <summary>