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internal/app/app.go

@@ -661,6 +661,7 @@ func setupRoutes(
 		protected.POST("/conversations", conversationHandler.CreateConversation)
 		protected.GET("/conversations", conversationHandler.ListConversations)
 		protected.GET("/conversations/:id", conversationHandler.GetConversation)
+		protected.GET("/messages/:id/process-details", conversationHandler.GetMessageProcessDetails)
 		protected.PUT("/conversations/:id", conversationHandler.UpdateConversation)
 		protected.DELETE("/conversations/:id", conversationHandler.DeleteConversation)
 		protected.PUT("/conversations/:id/pinned", groupHandler.UpdateConversationPinned)

internal/database/conversation.go

@@ -256,6 +256,53 @@ func (db *DB) GetConversation(id string) (*Conversation, error) {
 	return &conv, nil
 }
 
+// GetConversationLite 获取对话（轻量版）：包含 messages，但不加载 process_details。
+// 用于历史会话快速切换，避免一次性把大体量过程详情灌到前端导致卡顿。
+func (db *DB) GetConversationLite(id string) (*Conversation, error) {
+	var conv Conversation
+	var createdAt, updatedAt string
+	var pinned int
+
+	err := db.QueryRow(
+		"SELECT id, title, pinned, created_at, updated_at FROM conversations WHERE id = ?",
+		id,
+	).Scan(&conv.ID, &conv.Title, &pinned, &createdAt, &updatedAt)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, fmt.Errorf("对话不存在")
+		}
+		return nil, fmt.Errorf("查询对话失败: %w", err)
+	}
+
+	// 尝试多种时间格式解析
+	var err1, err2 error
+	conv.CreatedAt, err1 = time.Parse("2006-01-02 15:04:05.999999999-07:00", createdAt)
+	if err1 != nil {
+		conv.CreatedAt, err1 = time.Parse("2006-01-02 15:04:05", createdAt)
+	}
+	if err1 != nil {
+		conv.CreatedAt, _ = time.Parse(time.RFC3339, createdAt)
+	}
+
+	conv.UpdatedAt, err2 = time.Parse("2006-01-02 15:04:05.999999999-07:00", updatedAt)
+	if err2 != nil {
+		conv.UpdatedAt, err2 = time.Parse("2006-01-02 15:04:05", updatedAt)
+	}
+	if err2 != nil {
+		conv.UpdatedAt, _ = time.Parse(time.RFC3339, updatedAt)
+	}
+
+	conv.Pinned = pinned != 0
+
+	// 加载消息（不加载 process_details）
+	messages, err := db.GetMessages(id)
+	if err != nil {
+		return nil, fmt.Errorf("加载消息失败: %w", err)
+	}
+	conv.Messages = messages
+	return &conv, nil
+}
+
 // ListConversations 列出所有对话
 func (db *DB) ListConversations(limit, offset int, search string) ([]*Conversation, error) {
 	var rows *sql.Rows

internal/handler/conversation.go

@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"encoding/json"
 	"net/http"
 	"strconv"
 
@@ -78,7 +79,20 @@ func (h *ConversationHandler) ListConversations(c *gin.Context) {
 func (h *ConversationHandler) GetConversation(c *gin.Context) {
 	id := c.Param("id")
 
-	conv, err := h.db.GetConversation(id)
+	// 默认轻量加载，只有用户需要展开详情时再按需拉取
+	// include_process_details=1/true 时返回全量 processDetails（兼容旧行为）
+	includeStr := c.DefaultQuery("include_process_details", "0")
+	include := includeStr == "1" || includeStr == "true" || includeStr == "yes"
+
+	var (
+		conv *database.Conversation
+		err  error
+	)
+	if include {
+		conv, err = h.db.GetConversation(id)
+	} else {
+		conv, err = h.db.GetConversationLite(id)
+	}
 	if err != nil {
 		h.logger.Error("获取对话失败", zap.Error(err))
 		c.JSON(http.StatusNotFound, gin.H{"error": "对话不存在"})
@@ -88,6 +102,44 @@ func (h *ConversationHandler) GetConversation(c *gin.Context) {
 	c.JSON(http.StatusOK, conv)
 }
 
+// GetMessageProcessDetails 获取指定消息的过程详情（按需加载）
+func (h *ConversationHandler) GetMessageProcessDetails(c *gin.Context) {
+	messageID := c.Param("id")
+	if messageID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "message id required"})
+		return
+	}
+
+	details, err := h.db.GetProcessDetails(messageID)
+	if err != nil {
+		h.logger.Error("获取过程详情失败", zap.Error(err))
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	// 转换为前端期望的 JSON 结构（与 GetConversation 中 processDetails 结构一致）
+	out := make([]map[string]interface{}, 0, len(details))
+	for _, d := range details {
+		var data interface{}
+		if d.Data != "" {
+			if err := json.Unmarshal([]byte(d.Data), &data); err != nil {
+				h.logger.Warn("解析过程详情数据失败", zap.Error(err))
+			}
+		}
+		out = append(out, map[string]interface{}{
+			"id":             d.ID,
+			"messageId":      d.MessageID,
+			"conversationId": d.ConversationID,
+			"eventType":      d.EventType,
+			"message":        d.Message,
+			"data":           data,
+			"createdAt":      d.CreatedAt,
+		})
+	}
+
+	c.JSON(http.StatusOK, gin.H{"processDetails": out})
+}
+
 // UpdateConversationRequest 更新对话请求
 type UpdateConversationRequest struct {
 	Title string `json:"title"`