fix: set AP hotspot password to fixed WPA2 PSK "12345678"

Open network was not viable as nmcli generates random password by default.
Use a simple fixed password since the AP is only for short-lived provisioning.

Made-with: Cursor

lib/network.js

@@ -5,7 +5,7 @@ const log = require('./logger');
 
 const AP_SSID_PREFIX = 'ClawBox-';
 const AP_IP          = '10.42.0.1';
-const AP_PASSWORD    = ''; // 开放网络，无密码（配网专用，生命周期短）
+const AP_PASSWORD    = '12345678';
 const AP_IFACE       = process.env.CLAWD_WIFI_IFACE || '';
 const CON_NAME       = 'clawd-hotspot';