fix: rename dialog_id to chat_id in chat_channel (backend + frontend) (#16096)

## Summary

- The `ChatChannel` DB column was renamed from `dialog_id` to `chat_id`
via a migration (added in a prior commit).
- Aligns the REST API layer (`chat_channel_api.py`,
`chat_channel_service.py`) to use `chat_id` consistently.
- Updates the frontend (`interface.ts`, `hooks.ts`,
`connect-dialog-modal.tsx`, `added-channel-card.tsx`) to read/write
`chat_id` instead of `dialog_id`.
- The joined `dialog_name` alias in the list query is unchanged (backend
still returns it under that name).

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

web/src/pages/user-setting/chat-channel/component/added-channel-card.tsx

@@ -58,10 +58,10 @@ export const AddedChannelCard = (props: IAddedChannelCardProps) => {
           >
             <div className="flex flex-col gap-0.5">
               <div className="text-sm text-text-primary">{item.name}</div>
-              {item.dialog_id ? (
+              {item.chat_id ? (
                 <div className="text-xs text-text-secondary flex items-center gap-1">
                   <Link2 size={12} />
-                  {item.dialog_name || item.dialog_id}
+                  {item.dialog_name || item.chat_id}
                 </div>
               ) : (
                 <div className="text-xs text-text-secondary/60">

web/src/pages/user-setting/chat-channel/component/connect-dialog-modal.tsx

@@ -22,12 +22,12 @@ const ConnectDialogModal = ({
   const { dialogs } = useChatChannelDialogList();
   const { connect, connecting } = useConnectChatChannelDialog();
   const [dialogId, setDialogId] = useState<string | undefined>(
-    channel?.dialog_id ?? undefined,
+    channel?.chat_id ?? undefined,
   );
 
   useEffect(() => {
-    setDialogId(channel?.dialog_id ?? undefined);
-  }, [channel?.id, channel?.dialog_id]);
+    setDialogId(channel?.chat_id ?? undefined);
+  }, [channel?.id, channel?.chat_id]);
 
   const options = useMemo(
     () => (dialogs || []).map((d) => ({ label: d.name, value: d.id })),

web/src/pages/user-setting/chat-channel/hooks.ts

@@ -166,7 +166,7 @@ export const useConnectChatChannelDialog = () => {
       dialogId: string | null;
     }) => {
       const { data } = await updateChatChannel(params.channelId, {
-        dialog_id: params.dialogId,
+        chat_id: params.dialogId,
       });
       if (data.code === 0) {
         message.success(t('message.operated'));

web/src/pages/user-setting/chat-channel/interface.ts

@@ -11,8 +11,8 @@ export interface IChatChannelBase {
   id: string;
   name: string;
   channel: ChatChannelKey;
-  // Connected assistant (dialog), joined in by the list endpoint.
-  dialog_id?: string | null;
+  // Connected assistant (chat), joined in by the list endpoint.
+  chat_id?: string | null;
   dialog_name?: string | null;
 }