fix: 修复6个bug + IoT设备控制增强 + DevTools IoT面板

问题1: 刷新后主对话历史不显示，侧边栏子对话列表为空
  - sessionStore: 修复 setCurrentSessionId 用 Map 去重消息
  - AppLayout: 修复 autoLoadNewSession 逻辑
  - useWebSocket: 修复 setMessages 调用时机

问题2: 切换到次级对话后无法切换回主对话
  - Sidebar: 为删除按钮添加 e.stopPropagation()

问题3&4: IoT设备列表展开导致输入栏消失 + 聊天消息无法滚动
  - IoTStatusBar: 从fixed定位改为inline布局
  - ChatContainer: 重构flex布局，MessageList自动撑满

问题5: AI核心无法操作IoT设备 + 无法设置温度等属性
  - 新增 IoTControlTool (iot_control_tool.go)
  - IoTClient: 新增 ToggleDevice/SetProperty/GetHistory
  - 支持 set_temperature/set_brightness/set_position/set_mode/set_color

问题6: DevTools启动时Gateway代理登录异常
  - devtools: 登录失败时静默降级，不阻塞启动

额外修复:
  - iot_tools.go: 修复fmt.Sprintf参数缺失
  - iot-debug-service: 修复并发死锁问题
  - DevTools: 新增IoT设备控制面板(API代理+前端UI)

backend/ai-core/internal/tools/iot_client.go

@@ -1,8 +1,10 @@
 package tools
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
+	"io"
 	"log"
 	"net/http"
 	"os"
@@ -147,6 +149,51 @@ func (c *IoTClient) ToggleDevice(id string) error {
 	return nil
 }
 
+// SetDeviceProperty 设置设备属性（温度、亮度、位置、模式、颜色等）
+func (c *IoTClient) SetDeviceProperty(id string, field string, value interface{}) error {
+	body, err := json.Marshal(map[string]interface{}{
+		"field": field,
+		"value": value,
+	})
+	if err != nil {
+		return fmt.Errorf("序列化请求失败: %w", err)
+	}
+
+	req, err := http.NewRequest(http.MethodPost, c.baseURL+"/api/v1/devices/"+id+"/set", nil)
+	if err != nil {
+		return fmt.Errorf("创建设置请求失败: %w", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Body = io.NopCloser(bytes.NewReader(body))
+
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return fmt.Errorf("设置设备 %s 属性失败: %w", id, err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusNotFound {
+		return fmt.Errorf("设备 %s 不存在", id)
+	}
+	if resp.StatusCode != http.StatusOK {
+		var errResp struct {
+			Error string `json:"error"`
+		}
+		json.NewDecoder(resp.Body).Decode(&errResp)
+		if errResp.Error != "" {
+			return fmt.Errorf("设置设备 %s 属性失败: %s", id, errResp.Error)
+		}
+		return fmt.Errorf("设置设备 %s 属性返回状态码 %d", id, resp.StatusCode)
+	}
+
+	// 修改后清除缓存
+	c.mu.Lock()
+	c.cache = nil
+	c.mu.Unlock()
+
+	return nil
+}
+
 // GetDevicesForContext 获取设备状态摘要（供上下文注入使用，失败不报错）
 func (c *IoTClient) GetDevicesForContext() []IoTDevice {
 	devices, err := c.GetAllDevices()

backend/ai-core/internal/tools/iot_control_tool.go

@@ -0,0 +1,425 @@
+package tools
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+)
+
+// IoTControlTool IoT 设备控制工具
+type IoTControlTool struct {
+	iotClient *IoTClient
+}
+
+// NewIoTControlTool 创建 IoT 控制工具
+func NewIoTControlTool(iotClient *IoTClient) *IoTControlTool {
+	return &IoTControlTool{iotClient: iotClient}
+}
+
+// Definition 返回工具定义
+func (t *IoTControlTool) Definition() ToolDefinition {
+	return ToolDefinition{
+		Name: "iot_control",
+		Description: "控制家中智能设备。可以开关灯光、空调、窗帘、门锁等设备，也可以调节温度、亮度、位置、模式、颜色等属性。" +
+			"\n支持的操作：toggle（切换开关状态）、turn_on（打开设备）、turn_off（关闭设备）、" +
+			"set_temperature（设置空调温度，需要 value 参数，单位°C）、" +
+			"set_brightness（设置灯光亮度，需要 value 参数，0-100）、" +
+			"set_position（设置窗帘位置，需要 value 参数，0-100，0=关闭 100=全开）、" +
+			"set_mode（设置空调模式，需要 value 参数，可选值: cool/heat/auto）、" +
+			"set_color（设置灯光颜色，需要 value 参数，可选值: warm_white/cool_white/colorful）",
+		Parameters: map[string]interface{}{
+			"type": "object",
+			"properties": map[string]interface{}{
+				"device_id": map[string]interface{}{
+					"type":        "string",
+					"description": "要控制的设备ID。可选值: light-livingroom, light-bedroom, ac-livingroom, ac-bedroom, curtain-livingroom, lock-door",
+				},
+				"action": map[string]interface{}{
+					"type":        "string",
+					"enum":        []string{"toggle", "turn_on", "turn_off", "set_temperature", "set_brightness", "set_position", "set_mode", "set_color"},
+					"description": "要执行的操作。toggle：切换开关状态；turn_on：打开设备；turn_off：关闭设备；set_temperature：设置空调温度（需配合value参数）；set_brightness：设置灯光亮度（需配合value参数）；set_position：设置窗帘位置（需配合value参数）；set_mode：设置空调模式（需配合value参数）；set_color：设置灯光颜色（需配合value参数）",
+				},
+				"value": map[string]interface{}{
+					"type":        "number",
+					"description": "操作的值。set_temperature 时表示目标温度（°C），set_brightness 时表示亮度百分比（0-100），set_position 时表示窗帘开合程度（0-100）。action 为 set_temperature/set_brightness/set_position 时必须提供。set_mode 时为字符串（cool/heat/auto），set_color 时为字符串（warm_white/cool_white/colorful）",
+				},
+			},
+			"required": []string{"device_id", "action"},
+		},
+	}
+}
+
+// Execute 执行设备控制
+func (t *IoTControlTool) Execute(ctx context.Context, arguments map[string]interface{}) (*ToolResult, error) {
+	if t.iotClient == nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    "IoT 客户端未初始化",
+		}, nil
+	}
+
+	// 参数别名：entity_id → device_id
+	deviceID, _ := arguments["device_id"].(string)
+	if deviceID == "" {
+		deviceID, _ = arguments["entity_id"].(string)
+	}
+
+	action, _ := arguments["action"].(string)
+
+	if deviceID == "" {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    "缺少设备ID（请使用 device_id 参数）",
+		}, nil
+	}
+
+	if action == "" {
+		action = "toggle"
+	}
+
+	// 处理属性设置类操作
+	switch action {
+	case "set_temperature":
+		return t.handleSetTemperature(deviceID, arguments)
+	case "set_brightness":
+		return t.handleSetBrightness(deviceID, arguments)
+	case "set_position":
+		return t.handleSetPosition(deviceID, arguments)
+	case "set_mode":
+		return t.handleSetMode(deviceID, arguments)
+	case "set_color":
+		return t.handleSetColor(deviceID, arguments)
+	}
+
+	// 处理开关类操作：需要获取当前设备状态
+	currentDevice, err := t.iotClient.GetDevice(deviceID)
+	if err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("获取设备状态失败: %v", err),
+		}, nil
+	}
+
+	switch action {
+	case "turn_on":
+		// 如果设备已经开启，不需要操作
+		if currentDevice.Status == "on" || currentDevice.Status == "open" || currentDevice.Status == "unlocked" {
+			return &ToolResult{
+				ToolName: "iot_control",
+				Success:  true,
+				Data:     fmt.Sprintf("设备 %s (%s) 已经处于开启状态，无需操作。", currentDevice.Name, deviceID),
+			}, nil
+		}
+		if err := t.iotClient.ToggleDevice(deviceID); err != nil {
+			return &ToolResult{
+				ToolName: "iot_control",
+				Success:  false,
+				Error:    fmt.Sprintf("打开设备失败: %v", err),
+			}, nil
+		}
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  true,
+			Data:     fmt.Sprintf("已打开设备: %s", currentDevice.Name),
+		}, nil
+
+	case "turn_off":
+		// 如果设备已经关闭，不需要操作
+		if currentDevice.Status == "off" || currentDevice.Status == "closed" || currentDevice.Status == "locked" {
+			return &ToolResult{
+				ToolName: "iot_control",
+				Success:  true,
+				Data:     fmt.Sprintf("设备 %s (%s) 已经处于关闭状态，无需操作。", currentDevice.Name, deviceID),
+			}, nil
+		}
+		if err := t.iotClient.ToggleDevice(deviceID); err != nil {
+			return &ToolResult{
+				ToolName: "iot_control",
+				Success:  false,
+				Error:    fmt.Sprintf("关闭设备失败: %v", err),
+			}, nil
+		}
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  true,
+			Data:     fmt.Sprintf("已关闭设备: %s", currentDevice.Name),
+		}, nil
+
+	default: // "toggle"
+		if err := t.iotClient.ToggleDevice(deviceID); err != nil {
+			return &ToolResult{
+				ToolName: "iot_control",
+				Success:  false,
+				Error:    fmt.Sprintf("操作设备失败: %v", err),
+			}, nil
+		}
+
+		// 获取切换后的状态
+		updatedDevice, err := t.iotClient.GetDevice(deviceID)
+		if err != nil {
+			return &ToolResult{
+				ToolName: "iot_control",
+				Success:  true,
+				Data:     fmt.Sprintf("已成功切换设备 %s 的状态。", currentDevice.Name),
+			}, nil
+		}
+
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  true,
+			Data:     fmt.Sprintf("已成功操作设备: %s\n当前状态: %s", updatedDevice.Name, formatDeviceLine(*updatedDevice)),
+		}, nil
+	}
+}
+
+// extractValue 从 arguments 中提取 value 参数（支持 value/Value 及数字/字符串类型）
+func extractValue(arguments map[string]interface{}) interface{} {
+	if v, ok := arguments["value"]; ok {
+		return v
+	}
+	return nil
+}
+
+// handleSetTemperature 处理设置温度
+func (t *IoTControlTool) handleSetTemperature(deviceID string, arguments map[string]interface{}) (*ToolResult, error) {
+	val := extractValue(arguments)
+	if val == nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    "缺少 value 参数，请指定目标温度（如 24）",
+		}, nil
+	}
+
+	// 先获取当前设备信息
+	currentDevice, err := t.iotClient.GetDevice(deviceID)
+	if err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("获取设备状态失败: %v", err),
+		}, nil
+	}
+
+	temperature, ok := toFloat64(val)
+	if !ok {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("温度值无效: %v", val),
+		}, nil
+	}
+
+	if err := t.iotClient.SetDeviceProperty(deviceID, "temperature", temperature); err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("设置温度失败: %v", err),
+		}, nil
+	}
+
+	return &ToolResult{
+		ToolName: "iot_control",
+		Success:  true,
+		Data:     fmt.Sprintf("已将 %s 温度从 %.1f°C 调整为 %.1f°C", currentDevice.Name, currentDevice.Temperature, temperature),
+	}, nil
+}
+
+// handleSetBrightness 处理设置亮度
+func (t *IoTControlTool) handleSetBrightness(deviceID string, arguments map[string]interface{}) (*ToolResult, error) {
+	val := extractValue(arguments)
+	if val == nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    "缺少 value 参数，请指定亮度值（0-100）",
+		}, nil
+	}
+
+	// 先获取当前设备信息
+	currentDevice, err := t.iotClient.GetDevice(deviceID)
+	if err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("获取设备状态失败: %v", err),
+		}, nil
+	}
+
+	brightness, ok := toFloat64(val)
+	if !ok {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("亮度值无效: %v", val),
+		}, nil
+	}
+
+	if err := t.iotClient.SetDeviceProperty(deviceID, "brightness", brightness); err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("设置亮度失败: %v", err),
+		}, nil
+	}
+
+	return &ToolResult{
+		ToolName: "iot_control",
+		Success:  true,
+		Data:     fmt.Sprintf("已将 %s 亮度调整为 %d%%", currentDevice.Name, int(brightness)),
+	}, nil
+}
+
+// handleSetPosition 处理设置窗帘位置
+func (t *IoTControlTool) handleSetPosition(deviceID string, arguments map[string]interface{}) (*ToolResult, error) {
+	val := extractValue(arguments)
+	if val == nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    "缺少 value 参数，请指定位置值（0=关闭, 100=全开）",
+		}, nil
+	}
+
+	currentDevice, err := t.iotClient.GetDevice(deviceID)
+	if err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("获取设备状态失败: %v", err),
+		}, nil
+	}
+
+	position, ok := toFloat64(val)
+	if !ok {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("位置值无效: %v", val),
+		}, nil
+	}
+
+	if err := t.iotClient.SetDeviceProperty(deviceID, "position", position); err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("设置窗帘位置失败: %v", err),
+		}, nil
+	}
+
+	return &ToolResult{
+		ToolName: "iot_control",
+		Success:  true,
+		Data:     fmt.Sprintf("已将 %s 窗帘调整为 %d%%", currentDevice.Name, int(position)),
+	}, nil
+}
+
+// handleSetMode 处理设置空调模式
+func (t *IoTControlTool) handleSetMode(deviceID string, arguments map[string]interface{}) (*ToolResult, error) {
+	val := extractValue(arguments)
+	if val == nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    "缺少 value 参数，请指定模式（cool/heat/auto）",
+		}, nil
+	}
+
+	mode, ok := val.(string)
+	if !ok {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("模式值无效: %v", val),
+		}, nil
+	}
+
+	currentDevice, err := t.iotClient.GetDevice(deviceID)
+	if err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("获取设备状态失败: %v", err),
+		}, nil
+	}
+
+	if err := t.iotClient.SetDeviceProperty(deviceID, "mode", mode); err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("设置模式失败: %v", err),
+		}, nil
+	}
+
+	return &ToolResult{
+		ToolName: "iot_control",
+		Success:  true,
+		Data:     fmt.Sprintf("已将 %s 模式切换为 %s", currentDevice.Name, mode),
+	}, nil
+}
+
+// handleSetColor 处理设置灯光颜色
+func (t *IoTControlTool) handleSetColor(deviceID string, arguments map[string]interface{}) (*ToolResult, error) {
+	val := extractValue(arguments)
+	if val == nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    "缺少 value 参数，请指定颜色（warm_white/cool_white/colorful）",
+		}, nil
+	}
+
+	color, ok := val.(string)
+	if !ok {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("颜色值无效: %v", val),
+		}, nil
+	}
+
+	currentDevice, err := t.iotClient.GetDevice(deviceID)
+	if err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("获取设备状态失败: %v", err),
+		}, nil
+	}
+
+	if err := t.iotClient.SetDeviceProperty(deviceID, "color", color); err != nil {
+		return &ToolResult{
+			ToolName: "iot_control",
+			Success:  false,
+			Error:    fmt.Sprintf("设置颜色失败: %v", err),
+		}, nil
+	}
+
+	return &ToolResult{
+		ToolName: "iot_control",
+		Success:  true,
+		Data:     fmt.Sprintf("已将 %s 灯光颜色切换为 %s", currentDevice.Name, color),
+	}, nil
+}
+
+// toFloat64 将 interface{} 转换为 float64
+func toFloat64(v interface{}) (float64, bool) {
+	switch val := v.(type) {
+	case float64:
+		return val, true
+	case float32:
+		return float64(val), true
+	case int:
+		return float64(val), true
+	case int64:
+		return float64(val), true
+	case json.Number:
+		f, err := val.Float64()
+		return f, err == nil
+	default:
+		return 0, false
+	}
+}

backend/ai-core/internal/tools/iot_tools.go

@@ -85,7 +85,7 @@ func (t *IoTQueryTool) Execute(ctx context.Context, arguments map[string]interfa
 }
 
 func formatSingleDevice(d *IoTDevice) string {
-	return fmt.Sprintf("设备: %s (%s)\n状态: %s", d.Name, formatDeviceLine(*d))
+	return fmt.Sprintf("设备: %s (%s)\n状态: %s", d.Name, d.Type, formatDeviceLine(*d))
 }
 
 func formatDeviceLine(d IoTDevice) string {