feat: wire watch pages to @system.interconnect bridge

src/pages/settings/settings.ux

@@ -19,6 +19,7 @@
 
 <script>
 import router from '@system.router'
+import bridge from '../../common/bridge.js'
 
 export default {
   private: {
@@ -31,8 +32,7 @@ export default {
   onUserChange(e) { this.userId = e && e.value || '' },
   onTokenChange(e) { this.token = e && e.value || '' },
   save() {
-    // 空壳：后续持久化并与 index 页同步
-    console.log('save settings', this.serverUrl, this.userId)
+    bridge.sendSettings({ serverUrl: this.serverUrl, userId: this.userId, token: this.token })
   },
   goBack() {
     router.back()