refactor(qqbot): split qqbot.py into package & add QR scan-to-configure onboard flow

- Refactor gateway/platforms/qqbot.py into gateway/platforms/qqbot/ package:
  - adapter.py: core QQAdapter (unchanged logic, constants from shared module)
  - constants.py: shared constants (API URLs, timeouts, message types)
  - crypto.py: AES-256-GCM key generation and secret decryption
  - onboard.py: QR-code scan-to-configure API (create_bind_task, poll_bind_result)
  - utils.py: User-Agent builder, HTTP headers, config helpers
  - __init__.py: re-exports all public symbols for backward compatibility

- Add interactive QR-code setup flow in hermes_cli/gateway.py:
  - Terminal QR rendering via qrcode package (graceful fallback to URL)
  - Auto-refresh on QR expiry (up to 3 times)
  - AES-256-GCM encrypted credential exchange
  - DM security policy selection (pairing/allowlist/open)

- Update hermes_cli/setup.py to delegate to gateway's _setup_qqbot()
- Add qrcode>=7.4 dependency to pyproject.toml and requirements.txt

hermes_cli/setup.py

@@ -2005,52 +2005,6 @@ def _setup_wecom_callback():
     _gw_setup()
 
 
-def _setup_qqbot():
-    """Configure QQ Bot gateway."""
-    print_header("QQ Bot")
-    existing = get_env_value("QQ_APP_ID")
-    if existing:
-        print_info("QQ Bot: already configured")
-        if not prompt_yes_no("Reconfigure QQ Bot?", False):
-            return
-
-    print_info("Connects Hermes to QQ via the Official QQ Bot API (v2).")
-    print_info("   Requires a QQ Bot application at q.qq.com")
-    print_info("   Reference: https://bot.q.qq.com/wiki/develop/api-v2/")
-    print()
-
-    app_id = prompt("QQ Bot App ID")
-    if not app_id:
-        print_warning("App ID is required — skipping QQ Bot setup")
-        return
-    save_env_value("QQ_APP_ID", app_id.strip())
-
-    client_secret = prompt("QQ Bot App Secret", password=True)
-    if not client_secret:
-        print_warning("App Secret is required — skipping QQ Bot setup")
-        return
-    save_env_value("QQ_CLIENT_SECRET", client_secret)
-    print_success("QQ Bot credentials saved")
-
-    print()
-    print_info("🔒 Security: Restrict who can DM your bot")
-    print_info("   Use QQ user OpenIDs (found in event payloads)")
-    print()
-    allowed_users = prompt("Allowed user OpenIDs (comma-separated, leave empty for open access)")
-    if allowed_users:
-        save_env_value("QQ_ALLOWED_USERS", allowed_users.replace(" ", ""))
-        print_success("QQ Bot allowlist configured")
-    else:
-        print_info("⚠️  No allowlist set — anyone can DM the bot!")
-
-    print()
-    print_info("📬 Home Channel: OpenID for cron job delivery and notifications.")
-    home_channel = prompt("Home channel OpenID (leave empty to set later)")
-    if home_channel:
-        save_env_value("QQ_HOME_CHANNEL", home_channel)
-
-    print()
-    print_success("QQ Bot configured!")
 
 
 def _setup_bluebubbles():
@@ -2119,12 +2073,9 @@ def _setup_bluebubbles():
 
 
 def _setup_qqbot():
-    """Configure QQ Bot (Official API v2) via standard platform setup."""
-    from hermes_cli.gateway import _PLATFORMS
-    qq_platform = next((p for p in _PLATFORMS if p["key"] == "qqbot"), None)
-    if qq_platform:
-        from hermes_cli.gateway import _setup_standard_platform
-        _setup_standard_platform(qq_platform)
+    """Configure QQ Bot (Official API v2) via gateway setup."""
+    from hermes_cli.gateway import _setup_qqbot as _gateway_setup_qqbot
+    _gateway_setup_qqbot()
 
 
 def _setup_webhooks():
@@ -2264,7 +2215,7 @@ def setup_gateway(config: dict):
             missing_home.append("Slack")
         if get_env_value("BLUEBUBBLES_SERVER_URL") and not get_env_value("BLUEBUBBLES_HOME_CHANNEL"):
             missing_home.append("BlueBubbles")
-        if get_env_value("QQ_APP_ID") and not get_env_value("QQ_HOME_CHANNEL"):
+        if get_env_value("QQ_APP_ID") and not get_env_value("QQBOT_HOME_CHANNEL"):
             missing_home.append("QQBot")
 
         if missing_home: