feat: sys-call framework + channel.weixin stub (v1.4.0)

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/client.js

@@ -17,6 +17,7 @@ const { ProvisionManager } = require('./provisioning');
 const { BtMonitor }        = require('./bt-monitor');
 const { hasInternet, hasWiredInternetProbe, getLocalIps, getLocalNetworks } = require('./network');
 const { applyFullProviderFromVps, removeProviderByName, refreshModelsIfChanged, isFullProvider } = require('./openclaw-provider');
+const sysCall = require('./sys-call');
 const led = require('./led');
 
 const MAX_BACKOFF_MS      = 60_000;
@@ -403,6 +404,9 @@ class ClawClient {
       case 'upgrade':
         this._handleUpgrade(msg);
         break;
+      case 'sys-call':
+        sysCall.handle(msg, (reply) => this._send({ type: 'sys-call', ...reply }));
+        break;
       case 'headscale_logout':
         headscale.logout().catch(e => log.error('headscale', 'logout 失败:', e.message));
         break;