feat: one-click agent upgrade from hosts list (0.3.9)

Add Omada-style git version arrow in the agent version column to trigger WinRM/SSH background updates, and soften host detail live refresh with debounced incremental event patches.

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

frontend/src/views/HostsView.vue

@@ -67,13 +67,14 @@
           <td>{{ h.id }}</td>
           <td>{{ h.display_name || h.hostname }}</td>
           <td>{{ h.hostname }}</td>
-          <td>
-            <span
-              :class="{ 'agent-version-outdated': isVersionOutdated(h) }"
-              :title="versionTitle(h)"
-            >
-              {{ h.product_version || "—" }}
-            </span>
+          <td @click.stop>
+            <HostAgentVersionUpgrade
+              :host="h"
+              :git="data"
+              :updating="upgradingHostId === h.id"
+              :outdated-highlight="isVersionOutdated(h)"
+              @upgrade="startAgentUpgrade(h)"
+            />
           </td>
           <td>{{ h.os_family }}</td>
           <td>{{ h.ipv4 || "—" }}</td>
@@ -125,6 +126,13 @@ import {
 import { bumpLatestAgentVersion, patchHostSummaryFromDetail } from "../utils/hostsLiveUpdate";
 import { subscribeHostPatch } from "../utils/hostPatchBus";
 import { isAgentVersionOutdated } from "../utils/agentVersion";
+import {
+  isGitAgentUpgradeAvailable,
+  remoteActionKindForHost,
+  remoteActionTitleForHost,
+} from "../utils/hostAgentUpgrade";
+import { runHostRemoteAction } from "../composables/useHostRemoteAction";
+import HostAgentVersionUpgrade from "../components/HostAgentVersionUpgrade.vue";
 
 const router = useRouter();
 const route = useRoute();
@@ -188,6 +196,7 @@ const initialSort = loadHostsSortPrefs();
 const sortBy = ref<SortKey>(initialSort.sortBy);
 const sortDir = ref<"asc" | "desc">(initialSort.sortDir);
 const deletingId = ref<number | null>(null);
+const upgradingHostId = ref<number | null>(null);
 let patchingHostRow = false;
 let unsubscribeHostPatch: (() => void) | null = null;
 
@@ -223,17 +232,18 @@ function isVersionOutdated(h: HostSummary): boolean {
   return isAgentVersionOutdated(h.product_version, reference);
 }
 
-function versionTitle(h: HostSummary): string {
-  const reference =
-    data.value?.reference_agent_versions?.[h.product] ??
-    data.value?.latest_agent_versions?.[h.product];
-  if (!isVersionOutdated(h)) return "";
-  if (!reference) return "Устаревшая версия агента";
-  const fromSettings = data.value?.reference_agent_versions?.[h.product];
-  if (fromSettings && fromSettings !== data.value?.latest_agent_versions?.[h.product]) {
-    return `Устарела относительно эталона ${reference} (настройки SAC)`;
+async function startAgentUpgrade(h: HostSummary) {
+  if (!isGitAgentUpgradeAvailable(h, data.value) || upgradingHostId.value != null) {
+    return;
+  }
+  const kind = remoteActionKindForHost(h);
+  if (!kind) return;
+  upgradingHostId.value = h.id;
+  try {
+    await runHostRemoteAction(h.id, remoteActionTitleForHost(h), kind);
+  } finally {
+    upgradingHostId.value = null;
   }
-  return `Устарела относительно эталона ${reference}`;
 }
 
 function openHost(id: number) {