fix(weixin): add missing iLink headers to QR code login and clean up error output (#3044)

PR #2943 fixed headers in buildHeaders() but the login flow in
waitForLogin() still used a hardcoded incomplete header object.
Reuse the shared buildHeaders() so all endpoints send consistent
iLink-App-Id and iLink-App-ClientVersion headers.

Also wrap channel.connect() in startSingle() with a try/catch so
configuration errors print a clean message instead of dumping the
yargs help text and a stack trace.

packages/channels/weixin/src/api.ts

@@ -35,7 +35,7 @@ function randomUin(): string {
   return btoa(String.fromCharCode(...buf));
 }
 
-function buildHeaders(token?: string): Record<string, string> {
+export function buildHeaders(token?: string): Record<string, string> {
   const headers: Record<string, string> = {
     'Content-Type': 'application/json',
     'X-WECHAT-UIN': randomUin(),

packages/channels/weixin/src/login.ts

@@ -2,6 +2,8 @@
  * QR code login flow for WeChat iLink Bot.
  */
 
+import { buildHeaders } from './api.js';
+
 export interface LoginResult {
   connected: boolean;
   token?: string;
@@ -54,7 +56,7 @@ export async function waitForLogin(params: {
       const resp = await fetch(
         `${apiBaseUrl}/ilink/bot/get_qrcode_status?qrcode=${encodeURIComponent(currentQrcodeId)}`,
         {
-          headers: { 'iLink-App-ClientVersion': '1' },
+          headers: buildHeaders(),
           signal: controller.signal,
         },
       );

packages/cli/src/commands/channel/start.ts

@@ -183,7 +183,16 @@ async function startSingle(name: string): Promise<void> {
   const channel = createChannel(name, config, bridge, { router });
   channels.set(name, channel);
   registerToolCallDispatch(bridge, router, channels);
-  await channel.connect();
+
+  try {
+    await channel.connect();
+  } catch (err) {
+    writeStderrLine(
+      `Error: ${err instanceof Error ? err.message : String(err)}`,
+    );
+    bridge.stop();
+    process.exit(1);
+  }
 
   writeServiceInfo([name]);
   writeStdoutLine(`[Channel] "${name}" is running. Press Ctrl+C to stop.`);