feat: Dashboard MVP with summary API and UI

Add GET /api/v1/dashboards/summary (24h events, open problems,
hosts, severity breakdown, recent events) and Vue /dashboard page.

backend/app/api/v1/dashboards.py

@@ -0,0 +1,77 @@
+from datetime import datetime, timedelta, timezone
+
+from fastapi import APIRouter, Depends
+from pydantic import BaseModel
+from sqlalchemy import func, select
+from sqlalchemy.orm import Session, joinedload
+
+from app.auth.jwt_auth import get_current_user
+from app.database import get_db
+from app.models import Event, Host, Problem
+from app.schemas.list_models import EventSummary
+
+router = APIRouter(prefix="/dashboards", tags=["dashboards"])
+
+
+class DashboardSummary(BaseModel):
+    events_last_24h: int
+    hosts_total: int
+    problems_open: int
+    severity_24h: dict[str, int]
+    recent_events: list[EventSummary]
+
+
+@router.get("/summary", response_model=DashboardSummary)
+def dashboard_summary(
+    db: Session = Depends(get_db),
+    _user: str = Depends(get_current_user),
+) -> DashboardSummary:
+    since = datetime.now(timezone.utc) - timedelta(hours=24)
+
+    events_24h = db.scalar(
+        select(func.count()).select_from(Event).where(Event.received_at >= since)
+    ) or 0
+    hosts_total = db.scalar(select(func.count()).select_from(Host)) or 0
+    problems_open = (
+        db.scalar(select(func.count()).select_from(Problem).where(Problem.status == "open")) or 0
+    )
+
+    severity_rows = db.execute(
+        select(Event.severity, func.count())
+        .where(Event.received_at >= since)
+        .group_by(Event.severity)
+    ).all()
+    severity_24h = {row[0]: row[1] for row in severity_rows}
+
+    recent = db.scalars(
+        select(Event)
+        .join(Host)
+        .options(joinedload(Event.host))
+        .order_by(Event.received_at.desc())
+        .limit(8)
+    ).all()
+
+    recent_events = [
+        EventSummary(
+            id=e.id,
+            event_id=e.event_id,
+            host_id=e.host_id,
+            hostname=e.host.hostname,
+            occurred_at=e.occurred_at,
+            received_at=e.received_at,
+            category=e.category,
+            type=e.type,
+            severity=e.severity,
+            title=e.title,
+            summary=e.summary,
+        )
+        for e in recent
+    ]
+
+    return DashboardSummary(
+        events_last_24h=events_24h,
+        hosts_total=hosts_total,
+        problems_open=problems_open,
+        severity_24h=severity_24h,
+        recent_events=recent_events,
+    )

backend/app/api/v1/router.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter
 
-from app.api.v1 import auth, events, health, hosts, problems
+from app.api.v1 import auth, dashboards, events, health, hosts, problems
 
 api_router = APIRouter()
 api_router.include_router(health.router)
@@ -8,3 +8,4 @@ api_router.include_router(auth.router)
 api_router.include_router(events.router)
 api_router.include_router(hosts.router)
 api_router.include_router(problems.router)
+api_router.include_router(dashboards.router)

docs/work-plan.md

@@ -24,8 +24,8 @@
 | 1A.1 | Параметры `UseSAC`, `SAC_URL`, `SAC_API_KEY`, spool | ✅ ssh-monitor |
 | 1A.2 | `build_sac_event()` + `send_sac_event()` по schema v1 | ✅ `sac-client.sh` |
 | 1A.3 | `notify_or_sac()`: off / dual / exclusive / fallback | ✅ + маппинг событий |
-| 1A.4 | `--check-sac` / `Test-SacConnection` | 🔄 ssh-monitor `--check-sac` |
-| 1A.5 | README агентов | ⏳ |
+| 1A.4 | `--check-sac` / `Test-SacConnection` | ✅ ssh-monitor `--check-sac` |
+| 1A.5 | README агентов, first deploy | ✅ `first_deploy.sh`, `--deploy` |
 
 **Выход:** на тестовом хосте `dual` шлёт JSON в SAC + Telegram.
 
@@ -52,8 +52,8 @@
 | 1C.1 | Frontend Vue: Events, Hosts | ✅ prod |
 | 1C.2 | Auth JWT, admin bootstrap | ✅ prod |
 | 1C.3 | Problems (базовые правила) | ✅ API + UI (деплой ⏳) |
-| 1C.4 | Telegram из SAC | 🔄 backend MVP (деплой ⏳) |
-| 1C.5 | Dashboard (3 виджета), SSE | ⏳ |
+| 1C.4 | Telegram из SAC | ✅ backend (деплой + TELEGRAM_* в env) |
+| 1C.5 | Dashboard (3 виджета), SSE | 🔄 Dashboard MVP ✅, SSE ⏳ |
 
 **Выход:** тег `v0.1.0-mvp`.
 

frontend/src/App.vue

@@ -2,6 +2,7 @@
   <div class="layout">
     <nav v-if="showNav">
       <span class="brand">SAC</span>
+      <RouterLink to="/dashboard">Dashboard</RouterLink>
       <RouterLink to="/events">События</RouterLink>
       <RouterLink to="/problems">Проблемы</RouterLink>
       <RouterLink to="/hosts">Хосты</RouterLink>

frontend/src/api.ts

@@ -112,3 +112,11 @@ export async function ackProblem(problemId: number): Promise<{ id: number; statu
 export async function resolveProblem(problemId: number): Promise<{ id: number; status: string }> {
   return apiFetch(`/api/v1/problems/${problemId}/resolve`, { method: "POST" });
 }
+
+export interface DashboardSummary {
+  events_last_24h: number;
+  hosts_total: number;
+  problems_open: number;
+  severity_24h: Record<string, number>;
+  recent_events: EventSummary[];
+}

frontend/src/router.ts

@@ -5,11 +5,13 @@ import EventDetailView from "./views/EventDetailView.vue";
 import HostsView from "./views/HostsView.vue";
 import LoginView from "./views/LoginView.vue";
 import ProblemsView from "./views/ProblemsView.vue";
+import DashboardView from "./views/DashboardView.vue";
 
 const router = createRouter({
   history: createWebHistory(),
   routes: [
-    { path: "/", redirect: "/events" },
+    { path: "/", redirect: "/dashboard" },
+    { path: "/dashboard", component: DashboardView },
     { path: "/login", component: LoginView },
     { path: "/events", component: EventsView },
     { path: "/events/:id", component: EventDetailView, props: true },

frontend/src/style.css

@@ -131,3 +131,36 @@ pre {
   padding: 0.75rem;
   border-radius: 6px;
 }
+
+.dashboard-cards {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+  gap: 1rem;
+  margin-bottom: 1.5rem;
+}
+
+.dash-card {
+  background: #1a2332;
+  border: 1px solid #2a3441;
+  border-radius: 8px;
+  padding: 1rem 1.25rem;
+}
+
+.dash-value {
+  font-size: 2rem;
+  font-weight: 700;
+  color: #fff;
+}
+
+.dash-label {
+  color: #9aa4b2;
+  margin: 0.25rem 0 0.5rem;
+}
+
+.severity-list {
+  list-style: none;
+  padding: 0;
+  display: flex;
+  flex-wrap: wrap;
+  gap: 1rem;
+}

frontend/src/views/DashboardView.vue

@@ -0,0 +1,86 @@
+<template>
+  <h1>Dashboard</h1>
+  <p v-if="error" class="error">{{ error }}</p>
+  <p v-else-if="loading">Загрузка…</p>
+  <template v-else-if="data">
+    <div class="dashboard-cards">
+      <div class="dash-card">
+        <div class="dash-value">{{ data.events_last_24h }}</div>
+        <div class="dash-label">Событий за 24 ч</div>
+        <RouterLink to="/events">Все события →</RouterLink>
+      </div>
+      <div class="dash-card">
+        <div class="dash-value">{{ data.problems_open }}</div>
+        <div class="dash-label">Открытых проблем</div>
+        <RouterLink to="/problems">Проблемы →</RouterLink>
+      </div>
+      <div class="dash-card">
+        <div class="dash-value">{{ data.hosts_total }}</div>
+        <div class="dash-label">Хостов</div>
+        <RouterLink to="/hosts">Хосты →</RouterLink>
+      </div>
+    </div>
+
+    <h2>Severity за 24 ч</h2>
+    <ul class="severity-list">
+      <li v-for="(count, sev) in data.severity_24h" :key="sev">
+        <span :class="'sev-' + sev">{{ sev }}</span>: {{ count }}
+      </li>
+      <li v-if="!Object.keys(data.severity_24h).length">Нет событий</li>
+    </ul>
+
+    <h2>Последние события</h2>
+    <table>
+      <thead>
+        <tr>
+          <th>ID</th>
+          <th>Время</th>
+          <th>Хост</th>
+          <th>Severity</th>
+          <th>Title</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr v-for="e in data.recent_events" :key="e.id">
+          <td>
+            <RouterLink :to="`/events/${e.id}`">{{ e.id }}</RouterLink>
+          </td>
+          <td>{{ formatDt(e.occurred_at) }}</td>
+          <td>{{ e.hostname }}</td>
+          <td :class="'sev-' + e.severity">{{ e.severity }}</td>
+          <td>{{ e.title }}</td>
+        </tr>
+      </tbody>
+    </table>
+    <div class="filters" style="margin-top: 1rem">
+      <button type="button" class="secondary" @click="load">Обновить</button>
+    </div>
+  </template>
+</template>
+
+<script setup lang="ts">
+import { onMounted, ref } from "vue";
+import { apiFetch, type DashboardSummary } from "../api";
+
+const data = ref<DashboardSummary | null>(null);
+const loading = ref(false);
+const error = ref("");
+
+function formatDt(iso: string) {
+  return new Date(iso).toLocaleString("ru-RU");
+}
+
+async function load() {
+  loading.value = true;
+  error.value = "";
+  try {
+    data.value = await apiFetch<DashboardSummary>("/api/v1/dashboards/summary");
+  } catch (e) {
+    error.value = e instanceof Error ? e.message : String(e);
+  } finally {
+    loading.value = false;
+  }
+}
+
+onMounted(() => load());
+</script>