feat: delete host from UI with events and problems cleanup

DELETE /api/v1/hosts/{id} (JWT); host reappears on next agent ingest

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

frontend/src/views/HostsView.vue

@@ -25,6 +25,7 @@
           <th><button type="button" class="th-sort" @click="setSort('last_daily_report_at')">Отчёт {{ sortMark('last_daily_report_at') }}</button></th>
           <th><button type="button" class="th-sort" @click="setSort('last_seen_at')">Last seen {{ sortMark('last_seen_at') }}</button></th>
           <th><button type="button" class="th-sort" @click="setSort('event_count')">Events {{ sortMark('event_count') }}</button></th>
+          <th>Действия</th>
         </tr>
       </thead>
       <tbody>
@@ -48,6 +49,17 @@
           </td>
           <td>{{ formatDt(h.last_seen_at) }}</td>
           <td>{{ h.event_count ?? 0 }}</td>
+          <td class="actions">
+            <button
+              type="button"
+              class="danger"
+              :disabled="deletingId === h.id"
+              title="Удалить хост и все его события"
+              @click="confirmDelete(h)"
+            >
+              Удалить
+            </button>
+          </td>
         </tr>
       </tbody>
     </table>
@@ -74,6 +86,7 @@ type SortKey =
   | "last_daily_report_at";
 const sortBy = ref<SortKey>("last_seen_at");
 const sortDir = ref<"asc" | "desc">("desc");
+const deletingId = ref<number | null>(null);
 
 function formatDt(iso: string) {
   return new Date(iso).toLocaleString("ru-RU");
@@ -169,6 +182,36 @@ async function loadHosts() {
   }
 }
 
+interface HostDeleteResponse {
+  status: string;
+  host_id: number;
+  hostname: string;
+  deleted_events: number;
+  deleted_problems: number;
+}
+
+async function confirmDelete(h: HostSummary) {
+  const label = h.display_name || h.hostname;
+  const n = h.event_count ?? 0;
+  const msg =
+    `Удалить хост «${label}» (${h.hostname})?\n\n` +
+    `Будут удалены все события (${n}) и проблемы этого хоста. ` +
+    `При новом ingest агент снова появится в списке.`;
+  if (!window.confirm(msg)) {
+    return;
+  }
+  deletingId.value = h.id;
+  error.value = "";
+  try {
+    await apiFetch<HostDeleteResponse>(`/api/v1/hosts/${h.id}`, { method: "DELETE" });
+    await loadHosts();
+  } catch (e) {
+    error.value = e instanceof Error ? e.message : "Не удалось удалить хост";
+  } finally {
+    deletingId.value = null;
+  }
+}
+
 onMounted(() => {
   loadHosts();
 });