revert: remove ineffective showTime at startup, back to v1.3.7

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

lib/client.js

@@ -119,7 +119,6 @@ class ClawClient {
 
     // RJ45 链路轮询（OpenVFD play），与 WS 无关，进程起来即开始
     led.lan.start();
-    led.display.showTime(); // 启动即显时间，vfdservice 未就绪时静默跳过
 
     // 蓝牙状态监控（bluetoothctl）；默认不启用，见 btMonitorEnabled()
     if (btMonitorEnabled()) {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "clawd",
-  "version": "1.3.8",
+  "version": "1.3.7",
   "description": "Claw Box daemon - connects local Linux box to claw.cutos.ai via WebSocket",
   "main": "lib/client.js",
   "bin": {