feat(context-enhancement): 新增 chatId 与 threadId 来源字段 (#128)

Add chatId and threadId source fields across all nine IM channels, update UI/docs/tests, reconcile the latest main branch, and credit @Chan-0312 as a contributor.

src/channels/feishu/bridge.mjs

@@ -3330,6 +3330,8 @@ export class FeishuHarnessBridge {
       content = enhanceContextContent(originalContent, snapshot, () => ({
         channel: 'feishu',
         senderId: senderOpenId(event),
+        chatId: event.message.chat_id,
+        threadId: event.message.thread_id,
       }));
       contextEnhanced = content !== originalContent;
     }