fix(platforms): make QR fallback install tip target the active interpreter

The Feishu, WeCom, QQ onboarding and Telegram managed-bot flows printed a
hard-coded 'pip install qrcode' tip when the qrcode package was missing. In
Hermes' isolated venv the bare pip either doesn't exist or targets an
unrelated system Python. Print '{sys.executable} -m pip install qrcode'
instead, matching the existing codebase convention for install hints.

Fixes #111695

plugins/platforms/feishu/adapter.py

@@ -30,6 +30,7 @@ import logging
 import mimetypes
 import os
 import re
+import sys
 import threading
 import time
 import uuid
@@ -4103,7 +4104,7 @@ def _qr_register_inner(*, initial_domain: str, timeout_seconds: int) -> Optional
         print(f"\n  Scan the QR code above, or open this URL directly:\n  {qr_url}")
     else:
         print(f"  Open this URL in Feishu / Lark on your phone:\n\n  {qr_url}\n")
-        print("  Tip: pip install qrcode  to display a scannable QR code here next time")
+        print(f"  Tip: {sys.executable} -m pip install qrcode  to display a scannable QR code here next time")
     print()
     result = _poll_registration(
         device_code=begin["device_code"], interval=begin["interval"],

plugins/platforms/wecom/adapter.py

@@ -10,6 +10,7 @@ import asyncio
 import json
 import logging
 import re
+import sys
 import time
 import uuid
 from datetime import datetime, timezone
@@ -674,7 +675,7 @@ def qr_scan_for_bot_info(*, timeout_seconds: int = _QR_POLL_TIMEOUT) -> Optional
         print(f"\n  Scan the QR code above, or open this URL directly:\n  {page_url}")
     except Exception:
         print(f"  Open this URL in WeCom on your phone:\n\n  {page_url}\n")
-        print("  Tip: pip install qrcode  to display a scannable QR code here next time")
+        print(f"  Tip: {sys.executable} -m pip install qrcode  to display a scannable QR code here next time")
     print("\n  Fetching configuration results...", end="", flush=True)
     deadline = time.monotonic() + timeout_seconds
     query_url = f"{_QR_QUERY_URL}?scode={urllib.parse.quote(scode)}"