feat: 更新后端服务

- agent_handler.go: 新增agent管理接口
- agent_service.go: 扩展agent服务逻辑
- skill_handler.go: 更新skill接口
- chat_service.go: 更新chat服务
- model相关: 新增model仓库和服务
- main.go: 更新路由配置

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/internal/handler/agent_handler.go

@@ -243,3 +243,103 @@ func (h *AgentHandler) ListAgents(c *gin.Context) {
 
 	c.JSON(http.StatusOK, result)
 }
+
+// UpdateAgentStatusRequest 更新状态请求
+type UpdateAgentStatusRequest struct {
+	IsActive bool `json:"is_active"`
+}
+
+// UpdateAgentStatus 更新智能体状态
+// @Summary 更新智能体状态
+// @Tags 智能体管理
+// @Accept json
+// @Produce json
+// @Param id path string true "Agent ID"
+// @Param request body UpdateAgentStatusRequest true "状态请求"
+// @Success 200 {object} gin.H
+// @Router /api/agent/{id}/status [put]
+func (h *AgentHandler) UpdateAgentStatus(c *gin.Context) {
+	agentID := c.Param("id")
+	if agentID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "agent id is required"})
+		return
+	}
+
+	var req UpdateAgentStatusRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	err := h.agentService.UpdateAgentStatus(agentID, req.IsActive)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "status updated successfully"})
+}
+
+// DeleteAgent 删除智能体
+// @Summary 删除智能体
+// @Tags 智能体管理
+// @Produce json
+// @Param id path string true "Agent ID"
+// @Success 200 {object} gin.H
+// @Router /api/agent/{id} [delete]
+func (h *AgentHandler) DeleteAgent(c *gin.Context) {
+	agentID := c.Param("id")
+	if agentID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "agent id is required"})
+		return
+	}
+
+	err := h.agentService.DeleteAgent(agentID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "agent deleted successfully"})
+}
+
+// UpdateAgentRequest 更新智能体请求
+type UpdateAgentRequest struct {
+	Name            string   `json:"name"`
+	Description     string   `json:"description"`
+	Skills          []string `json:"skills"`
+	RoleDescription string   `json:"role_description"`
+	ModelProvider   string   `json:"model_provider"`
+	ModelName       string   `json:"model_name"`
+}
+
+// UpdateAgent 更新智能体
+// @Summary 更新智能体
+// @Tags 智能体管理
+// @Accept json
+// @Produce json
+// @Param id path string true "Agent ID"
+// @Param request body UpdateAgentRequest true "更新请求"
+// @Success 200 {object} gin.H
+// @Router /api/agent/{id} [put]
+func (h *AgentHandler) UpdateAgent(c *gin.Context) {
+	agentID := c.Param("id")
+	if agentID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "agent id is required"})
+		return
+	}
+
+	var req UpdateAgentRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	err := h.agentService.UpdateAgent(agentID, req.Name, req.Description, req.Skills, req.RoleDescription, req.ModelProvider, req.ModelName)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "agent updated successfully"})
+}