feat: AIOps智能助手对话历史持久化(按用户隔离,刷新后仍可见)

backend/internal/api/handlers/llm.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"ezops/internal/api/middleware"
 	"ezops/internal/models"
 
 	"github.com/gin-gonic/gin"
@@ -235,9 +236,23 @@ func (h *LLMHandler) Chat(c *gin.Context) {
 		c.JSON(http.StatusOK, models.Response{Code: 500, Message: "解析 LLM 响应失败"})
 		return
 	}
+	replyContent := chatResp.Choices[0].Message.Content
+
+	// 持久化对话历史（按用户隔离，成对写入 user + assistant） // Logan.Li
+	// 仅在成功时入库；错误气泡为瞬时 UI 不持久化
+	uid := middleware.GetUserID(c)
+	if uid != 0 && len(req.Messages) > 0 {
+		// 取最后一条用户消息（前端已附加当前提问）
+		lastUser := req.Messages[len(req.Messages)-1]
+		now := time.Now()
+		h.db.Create(&[]models.ChatHistory{
+			{UserID: uid, Role: "user", Content: lastUser.Content, CreatedAt: now},
+			{UserID: uid, Role: "assistant", Content: replyContent, Model: cfg.Model, CreatedAt: now.Add(time.Millisecond)},
+		})
+	}
 
 	c.JSON(http.StatusOK, models.Response{Code: 200, Data: models.ChatResponse{
-		Content:    chatResp.Choices[0].Message.Content,
+		Content:    replyContent,
 		Model:      cfg.Model,
 		TokensUsed: chatResp.Usage.TotalTokens,
 	}})
@@ -292,3 +307,34 @@ func (h *LLMHandler) TestLLMConnection(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "连接成功"})
 }
+
+// GetChatHistory 获取当前用户的对话历史（按时间正序，仅返回最近 100 条避免过大） // Logan.Li
+// GET /api/v1/aiops/chat-history
+func (h *LLMHandler) GetChatHistory(c *gin.Context) {
+	uid := middleware.GetUserID(c)
+	var rows []models.ChatHistory
+	// 子查询取最近 100 条后再正序返回，保证前端渲染顺序正确 // Logan.Li
+	h.db.Where("user_id = ?", uid).
+		Order("id DESC").
+		Limit(100).
+		Find(&rows)
+	// 反转为时间正序（最早在前）
+	for i, j := 0, len(rows)-1; i < j; i, j = i+1, j-1 {
+		rows[i], rows[j] = rows[j], rows[i]
+	}
+	c.JSON(http.StatusOK, models.Response{Code: 200, Data: gin.H{
+		"list":  rows,
+		"total": len(rows),
+	}})
+}
+
+// ClearChatHistory 清空当前用户的对话历史 // Logan.Li
+// DELETE /api/v1/aiops/chat-history
+func (h *LLMHandler) ClearChatHistory(c *gin.Context) {
+	uid := middleware.GetUserID(c)
+	if err := h.db.Where("user_id = ?", uid).Delete(&models.ChatHistory{}).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "清除失败: " + err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "对话历史已清空"})
+}

backend/internal/api/routes/routes.go

@@ -421,6 +421,8 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config) {
 		aiopsGroup.PUT("/llm-config", llmHandler.SaveLLMConfig)
 		aiopsGroup.POST("/llm-config/test", llmHandler.TestLLMConnection)
 		aiopsGroup.POST("/chat", llmHandler.Chat)
+		aiopsGroup.GET("/chat-history", llmHandler.GetChatHistory)
+		aiopsGroup.DELETE("/chat-history", llmHandler.ClearChatHistory)
 	}
 
 	// 启动告警引擎（每 30 秒检查一次）