fix(monitoring): WeChat Work feedback recording bugs (#2108)

* fix(monitoring): fix WeChat Work feedback recording bugs

- Fix feedback events silently dropped when stream session expires:
  dispatch feedback handlers regardless of session availability
- Fix IntegrityError on repeated feedback (like→dislike) for same
  message: implement UPSERT logic in record_feedback()
- Fix cancel feedback (type=3) not removing records: add delete logic
- Fix inaccurate_reasons validation error: convert int reason codes
  to strings before creating FeedbackEvent (Pydantic expects List[str])
- Fix feedback timestamps 8 hours off in frontend: use parseUTCTimestamp
  instead of new Date() for UTC timestamp parsing
- Fix StreamSessionManager.cleanup missing _feedback_index cleanup

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* fix(monitoring): apply ruff format to wecom feedback files

Co-Authored-By: Claude Opus 4.6 <[email protected]>

---------

Co-authored-by: 6mvp6 <[email protected]>
Co-authored-by: Claude Opus 4.6 <[email protected]>

web/src/app/home/monitoring/hooks/useFeedbackData.ts

@@ -1,6 +1,7 @@
 import { useState, useEffect, useCallback, useMemo } from 'react';
 import { httpClient } from '@/app/infra/http';
 import { FeedbackRecord, FeedbackStats } from '../types/monitoring';
+import { parseUTCTimestamp } from '../utils/dateUtils';
 
 interface UseFeedbackDataParams {
   botIds?: string[];
@@ -142,7 +143,7 @@ export function useFeedbackData(params: UseFeedbackDataParams = {}) {
         const transformedFeedback: FeedbackRecord[] = result.feedback.map(
           (item) => ({
             id: item.id,
-            timestamp: new Date(item.timestamp),
+            timestamp: parseUTCTimestamp(item.timestamp),
             feedbackId: item.feedback_id,
             feedbackType: item.feedback_type === 1 ? 'like' : 'dislike',
             feedbackContent: item.feedback_content,