feat: multi-listener bridge + subscribe/unsubscribe in index page

src/common/bridge.js

@@ -1,12 +1,12 @@
-// DSHWatch bridge: @system.interconnect wrapper (real shell glue).
-// Sends/receives JSON envelopes to the DSHWatch phone APP over the Xiaomi
-// Vela interconnect BLE channel. Protocol per DSHWatch_Server/docs/PROTOCOL.md.
+// DSHWatch bridge: @system.interconnect wrapper.
+// Sends/receives JSON envelopes to the DSHWatch phone APP over the Vela BLE channel.
+// Protocol per DSHWatch_Server/docs/PROTOCOL.md.
 
 import interconnect from '@system.interconnect'
 
 let conn = null
 let seq = 0
-let listeners = []
+const listeners = new Set()
 let currentStatus = '未连接'
 
 function getConn() {
@@ -48,8 +48,13 @@ function emit(type, payload) {
   }
 }
 
+export function subscribe(callbacks) {
+  listeners.add(callbacks)
+  return () => listeners.delete(callbacks)
+}
+
 export function init(callbacks) {
-  listeners = [callbacks]
+  subscribe(callbacks)
   refreshConn()
 }
 

src/pages/index/index.ux

@@ -71,7 +71,7 @@ export default {
   },
 
   onReady() {
-    bridge.init({
+    this._unsub = bridge.subscribe({
       status: (s) => {
         this.statusText = s
         this.connText = s
@@ -80,6 +80,11 @@ export default {
         this.handleBridgeMessage(msg)
       }
     })
+    bridge.refreshConn()
+  },
+
+  onDestroy() {
+    if (this._unsub) this._unsub()
   },
 
   onSwipeChange(e) {