fix(frontend): auto-close WinRM update success panel after 30s (0.20.24)

Remote action log dock closes on successful fallback; no duplicate inline message.

frontend/src/views/HostDetailView.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
   <p><RouterLink to="/hosts">← Хосты</RouterLink></p>
   <p v-if="error" class="error">{{ error }}</p>
   <p v-else-if="loading">Загрузка…</p>
@@ -623,9 +623,11 @@ async function runAgentFallback() {
     const job = await runHostRemoteAction(hostId.value, title, "fallback");
     if (job) {
       agentControlOk.value = job.ok ?? false;
-      agentControlMessage.value = job.message || "";
       if (job.ok) {
+        agentControlMessage.value = "";
         await loadHost();
+      } else {
+        agentControlMessage.value = job.message || "";
       }
     }
   } finally {