fix(roi-editor):修复 ROI 编辑器中时间段选择器（TimePicker.RangePicker）因连续调用两次状态更新导致的清空问题。

- 新增 `updateWorkingHoursRange` 批量更新函数，将 start/end 作为原子操作同步更新
- 在 onChange 回调中添加 `Array.isArray(dates) && dates.length >= 2` 类型校验
- 避免 React 异步 setState 冲突导致 workingHoursList 意外重置

frontend/src/pages/ROIEditor.tsx

@@ -37,12 +37,38 @@ const ROIEditor: React.FC = () => {
   const [selectedROI, setSelectedROI] = useState<ROI | null>(null);
   const [drawerVisible, setDrawerVisible] = useState(false);
   const [form] = Form.useForm();
+  const [workingHoursList, setWorkingHoursList] = useState<{start: dayjs.Dayjs | null, end: dayjs.Dayjs | null}[]>([]);
 
   const [isDrawing, setIsDrawing] = useState(false);
   const [tempPoints, setTempPoints] = useState<number[][]>([]);
   const [backgroundImage, setBackgroundImage] = useState<HTMLImageElement | null>(null);
   const stageRef = useRef<any>(null);
 
+  const addWorkingHours = () => {
+    setWorkingHoursList([...workingHoursList, { start: null, end: null }]);
+  };
+
+  const removeWorkingHours = (index: number) => {
+    const newList = workingHoursList.filter((_, i) => i !== index);
+    setWorkingHoursList(newList);
+  };
+
+  const updateWorkingHours = (index: number, field: 'start' | 'end', value: dayjs.Dayjs | null) => {
+    const newList = [...workingHoursList];
+    newList[index] = { ...newList[index], [field]: value };
+    setWorkingHoursList(newList);
+  };
+
+  const updateWorkingHoursRange = (index: number, start: dayjs.Dayjs | null, end: dayjs.Dayjs | null) => {
+    setWorkingHoursList(prev => {
+      const newList = [...prev];
+      if (newList[index]) {
+        newList[index] = { start, end };
+      }
+      return newList;
+    });
+  };
+
   const fetchCameras = async () => {
     try {
       const res = await axios.get('/api/cameras?enabled_only=true');
@@ -103,9 +129,11 @@ const ROIEditor: React.FC = () => {
   const handleSaveROI = async (values: any) => {
     if (!selectedCamera || !selectedROI) return;
     try {
-      const workingHours = values.working_hours?.map((item: any) => ({
-        start: [item.start.hour(), item.start.minute()],
-        end: [item.end.hour(), item.end.minute()],
+      const workingHours = workingHoursList
+        .filter(item => item.start && item.end)
+        .map(item => ({
+          start: [item.start!.hour(), item.start!.minute()],
+          end: [item.end!.hour(), item.end!.minute()],
         }));
 
       await axios.put(`/api/camera/${selectedCamera}/roi/${selectedROI.id}`, {
@@ -119,6 +147,7 @@ const ROIEditor: React.FC = () => {
       });
       message.success('保存成功');
       setDrawerVisible(false);
+      setWorkingHoursList([]);
       fetchROIs();
     } catch (err: any) {
       message.error(`保存失败: ${err.response?.data?.detail || '未知错误'}`);
@@ -226,11 +255,11 @@ const ROIEditor: React.FC = () => {
             threshold_sec: roi.threshold_sec,
             confirm_sec: roi.confirm_sec,
             enabled: roi.enabled,
-            working_hours: roi.working_hours?.map((wh: WorkingHours) => ({
-              start: dayjs().hour(wh.start[0]).minute(wh.start[1]),
-              end: dayjs().hour(wh.end[0]).minute(wh.end[1]),
-            })),
           });
+          setWorkingHoursList(roi.working_hours?.map((wh: WorkingHours) => ({
+            start: wh.start ? dayjs().hour(wh.start[0]).minute(wh.start[1]) : null,
+            end: wh.end ? dayjs().hour(wh.end[0]).minute(wh.end[1]) : null,
+          })) || []);
           setDrawerVisible(true);
         }}
         onMouseEnter={(e) => {
@@ -387,11 +416,11 @@ const ROIEditor: React.FC = () => {
                         threshold_sec: roi.threshold_sec,
                         confirm_sec: roi.confirm_sec,
                         enabled: roi.enabled,
-                        working_hours: roi.working_hours?.map((wh: WorkingHours) => ({
-                          start: dayjs().hour(wh.start[0]).minute(wh.start[1]),
-                          end: dayjs().hour(wh.end[0]).minute(wh.end[1]),
-                        })),
                       });
+                      setWorkingHoursList(roi.working_hours?.map((wh: WorkingHours) => ({
+                        start: wh.start ? dayjs().hour(wh.start[0]).minute(wh.start[1]) : null,
+                        end: wh.end ? dayjs().hour(wh.end[0]).minute(wh.end[1]) : null,
+                      })) || []);
                       setDrawerVisible(true);
                     }}
                   >
@@ -426,6 +455,7 @@ const ROIEditor: React.FC = () => {
         onClose={() => {
           setDrawerVisible(false);
           setSelectedROI(null);
+          setWorkingHoursList([]);
         }}
         width={400}
       >
@@ -458,33 +488,35 @@ const ROIEditor: React.FC = () => {
                 <InputNumber min={5} style={{ width: '100%' }} />
               </Form.Item>
               <Divider>工作时间配置（可选）</Divider>
-              <Form.List name="working_hours">
-                {(fields, { add, remove }) => (
               <div>
-                    {fields.map((field, index) => (
-                      <Space key={field.key} align="baseline" style={{ display: 'flex', marginBottom: 8 }}>
-                        <Form.Item
-                          {...field}
-                          label={index === 0 ? '时间段' : ''}
-                          style={{ marginBottom: 0 }}
-                        >
-                          <TimePicker.RangePicker format="HH:mm" />
+                {workingHoursList.map((item, index) => (
+                  <Space key={index} align="baseline" style={{ display: 'flex', marginBottom: 8 }}>
+                    <Form.Item label={index === 0 ? '时间段' : ''} style={{ marginBottom: 0 }}>
+                      <TimePicker.RangePicker
+                        format="HH:mm"
+                        value={item.start && item.end ? [item.start, item.end] : null}
+                        onChange={(dates) => {
+                          if (dates && Array.isArray(dates) && dates.length >= 2 && dates[0] && dates[1]) {
+                            updateWorkingHoursRange(index, dates[0], dates[1]);
+                          } else {
+                            updateWorkingHoursRange(index, null, null);
+                          }
+                        }}
+                      />
                     </Form.Item>
                     <Button
                       type="link"
                       danger
-                          onClick={() => remove(field.name)}
+                      onClick={() => removeWorkingHours(index)}
                     >
                       删除
                     </Button>
                   </Space>
                 ))}
-                    <Button type="dashed" onClick={() => add({ start: null, end: null })} block>
+                <Button type="dashed" onClick={addWorkingHours} block>
                   添加时间段
                 </Button>
               </div>
-                )}
-              </Form.List>
               <Form.Item style={{ fontSize: 12, color: '#999' }}>
                 不配置工作时间则使用系统全局设置
               </Form.Item>
@@ -501,6 +533,7 @@ const ROIEditor: React.FC = () => {
               <Button onClick={() => {
                 setDrawerVisible(false);
                 setSelectedROI(null);
+                setWorkingHoursList([]);
               }}>
                 取消
               </Button>