fix(link): ECAT 轮询必重挂；连接灯不覆盖语义文案；BLE 通知成功后再上报

js/common/connection.js

@@ -61,8 +61,9 @@ export function updateConnectionUi(connected, text) {
   try {
     var snap = deviceLink.getSnapshot();
     if (snap && snap.ts && (Date.now() - snap.ts) < 5000) {
+      /* 只覆盖在线布尔，保留调用方语义文案（设备忙/诊断中/STA…） */
       connected = !!snap.links.esp32.online;
-      text = connected ? '已连接' : '离线';
+      if (!text) text = connected ? '已连接' : '离线';
     }
   } catch (_) {}
   var label = text || (connected ? '已连接' : '未连接');

js/common/device-link.js

@@ -68,8 +68,6 @@ function createOwner() {
     if (ch) {
       try { ch.postMessage({ type: "snapshot", snap: snap }); } catch (_) {}
     }
-    /* 同源 iframe 也可读 window 顶层缓存（BC 不可用时的弱备份） */
-    try { window.__dcuDeviceLinkSnap = snap; } catch (_) {}
   }
 
   function setEsp32(status, ok) {
@@ -133,15 +131,17 @@ function createOwner() {
       e.online = !!(st && st.ok && st.slave);
       e.busOpen = e.online;
       /* native status 不直接给 op/loop；用 load valid + slave state 粗判 */
-      e.op = !!(st && st.slave && (st.slave.state & 0x0F) === 8);
+      e.op = !!(st && st.slave && st.slave.state != null && (st.slave.state & 0x0F) === 8);
       e.loadValid = !!(ld && ld.ok && ld.valid === true
         && Number.isFinite(ld.age_ms) && ld.age_ms >= 0 && ld.age_ms <= 3000);
       e.loop = e.loadValid || e.op;
       e.loadPerm = (ld && Number.isFinite(ld.load_perm)) ? ld.load_perm : 0;
       e.ageMs = (ld && Number.isFinite(ld.age_ms)) ? ld.age_ms : -1;
       publish();
+    }).catch(function () {
+      /* 字段访问/异常不得让 ECAT 轮询永久停摆 */
     }).then(function () {
-      ecatTimer = setTimeout(pollEcat, ECAT_POLL_MS);
+      if (!stopped) ecatTimer = setTimeout(pollEcat, ECAT_POLL_MS);
     });
   }
 
@@ -190,7 +190,6 @@ function createClient() {
   try { ch = new BroadcastChannel(CH_NAME); } catch (_) { ch = null; }
   var listeners = [];
   var last = null;
-  try { last = window.__dcuDeviceLinkSnap || null; } catch (_) {}
 
   function emit() {
     for (var i = 0; i < listeners.length; i++) {
@@ -203,7 +202,6 @@ function createClient() {
       var m = ev && ev.data;
       if (!m || m.type !== "snapshot" || !m.snap) return;
       last = m.snap;
-      try { window.__dcuDeviceLinkSnap = last; } catch (_) {}
       emit();
     });
     try { ch.postMessage({ type: "hello" }); } catch (_) {}