feat: live update log in UI and suppress lifecycle Telegram during SAC update

Poll remote update_script.log while SSH update runs; skip lifecycle notify
when host agent_update_state is running (SAC v0.5.1).

frontend/src/components/HostActionLogStack.vue

@@ -9,7 +9,9 @@
       :ok="entry.ok"
       :message="entry.message"
       :output="entry.output"
+      :log-visible="entry.logVisible"
       @close="closeHostRemoteActionLog(entry.id)"
+      @toggle-log="toggleHostRemoteActionLog(entry.id)"
     />
   </div>
 </template>
@@ -20,6 +22,7 @@ import HostActionLogModal from "./HostActionLogModal.vue";
 import {
   closeHostRemoteActionLog,
   hostRemoteActionLogs,
+  toggleHostRemoteActionLog,
 } from "../composables/useHostRemoteAction";
 
 const openLogs = computed(() => hostRemoteActionLogs.filter((e) => e.open));