feat(ui): live host row update via SSE without full reload

On new ingest, patch visible host from GET /hosts/{id}; SAC 0.8.1.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/views/HostsView.vue

@@ -10,7 +10,10 @@
   <p v-if="error" class="error">{{ error }}</p>
   <p v-else-if="loading">Загрузка…</p>
   <template v-else>
-    <p>Всего: {{ data?.total ?? 0 }}</p>
+    <p>
+      Всего: {{ data?.total ?? 0 }}
+      <span v-if="live" class="live-badge">live</span>
+    </p>
     <table class="hosts-table">
       <thead>
         <tr>
@@ -77,7 +80,15 @@
 <script setup lang="ts">
 import { computed, onMounted, ref } from "vue";
 import { useRouter } from "vue-router";
-import { apiFetch, type HostListResponse, type HostSummary } from "../api";
+import { useSacLiveEventStream } from "../composables/useSacLiveEventStream";
+import {
+  apiFetch,
+  fetchHost,
+  fetchRecentEvents,
+  type HostListResponse,
+  type HostSummary,
+} from "../api";
+import { patchHostSummaryFromDetail } from "../utils/hostsLiveUpdate";
 
 const router = useRouter();
 
@@ -139,6 +150,11 @@ const initialSort = loadHostsSortPrefs();
 const sortBy = ref<SortKey>(initialSort.sortBy);
 const sortDir = ref<"asc" | "desc">(initialSort.sortDir);
 const deletingId = ref<number | null>(null);
+let patchingHostRow = false;
+
+const { live } = useSacLiveEventStream(() => {
+  void patchHostRowFromLatestEvent();
+});
 
 function formatDt(iso: string) {
   return new Date(iso).toLocaleString("ru-RU");
@@ -248,6 +264,24 @@ async function loadHosts() {
   }
 }
 
+async function patchHostRowFromLatestEvent() {
+  if (!data.value?.items.length || patchingHostRow) return;
+  patchingHostRow = true;
+  try {
+    const recent = await fetchRecentEvents(1);
+    const ev = recent[0];
+    if (!ev) return;
+    const row = data.value.items.find((h) => h.id === ev.host_id);
+    if (!row) return;
+    const detail = await fetchHost(ev.host_id);
+    patchHostSummaryFromDetail(row, detail);
+  } catch {
+    /* keep table on transient errors */
+  } finally {
+    patchingHostRow = false;
+  }
+}
+
 interface HostDeleteResponse {
   status: string;
   host_id: number;