diff --git a/backend/app/routers/tasks.py b/backend/app/routers/tasks.py
index bba75b3..8fee559 100644
--- a/backend/app/routers/tasks.py
+++ b/backend/app/routers/tasks.py
@@ -1,4 +1,6 @@
-from fastapi import APIRouter, Depends, HTTPException, status
+from typing import Optional
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
 from sqlalchemy import select, desc
 from sqlalchemy.orm import selectinload
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -7,7 +9,7 @@ from app.dependencies import get_current_user, get_db
 from app.models.device import Device
 from app.models.object import Object
 from app.models.rack import Rack
-from app.models.task import Task
+from app.models.task import Task, TaskResult
 from app.models.zone import Zone
 from app.models.user import User
 from app.plugins.registry import action_registry
@@ -125,12 +127,19 @@ async def create_task(
 async def list_tasks(
     limit: int = 50,
     skip: int = 0,
+    device_id: Optional[int] = Query(None),
     db: AsyncSession = Depends(get_db),
     _: User = Depends(get_current_user),
 ):
-    rows = await db.execute(
-        select(Task).order_by(desc(Task.created_at)).offset(skip).limit(limit)
-    )
+    query = select(Task).order_by(desc(Task.created_at))
+    if device_id is not None:
+        query = (
+            query
+            .join(TaskResult, Task.id == TaskResult.task_id)
+            .where(TaskResult.device_id == device_id)
+            .distinct()
+        )
+    rows = await db.execute(query.offset(skip).limit(limit))
     tasks = list(rows.scalars().all())
     labels = await _resolve_labels(db, tasks)
     result = []
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index d140032..48e8afd 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -2,6 +2,7 @@ import { Navigate, Route, Routes } from 'react-router-dom'
 import { AppLayout } from './components/AppLayout'
 import { AdminPage } from './pages/Admin'
 import { AlertsPage } from './pages/Alerts'
+import { DeviceDetailPage } from './pages/DeviceDetail'
 import { LoginPage } from './pages/Login'
 import { ObjectsPage } from './pages/Objects'
 import { SnapshotsPage } from './pages/Snapshots'
@@ -34,6 +35,7 @@ export default function App() {
         {/* Инвентарь */}
         <Route path="inventory/objects" element={<ObjectsPage mode="inventory" />} />
         <Route path="inventory/objects/:id" element={<InventoryObjectDetailPage />} />
+        <Route path="inventory/objects/:id/devices/:deviceId" element={<DeviceDetailPage />} />
         <Route path="inventory/objects/:id/snapshots" element={<SnapshotsPage />} />
 
         {/* Работа */}
diff --git a/frontend/src/api/objects.ts b/frontend/src/api/objects.ts
index d755acb..419cd93 100644
--- a/frontend/src/api/objects.ts
+++ b/frontend/src/api/objects.ts
@@ -26,21 +26,30 @@ export interface DeviceItem {
   ip: string
   hostname: string | null
   mac: string | null
+  vendor: string | null
   category: string
   role: string
   model: string | null
+  firmware_version: string | null
   source: string
+  external_id: string | null
   rack_id: number | null
   rack_name: string | null
   rack_type: string | null
+  location: string | null
   ssh_user_override: string | null
   ssh_port_override: number | null
+  device_meta: Record<string, unknown>
+  connection_params: Record<string, unknown>
+  capabilities: string[]
   status: string
   last_seen: string | null
   last_ping_ms: number | null
   monitor_enabled: boolean
   is_active: boolean
-  capabilities: string[]
+  notes: string | null
+  created_at: string
+  updated_at: string
 }
 
 export interface SyncResult {
@@ -84,6 +93,14 @@ export const useDevices = (objId: number) =>
       api.get<DeviceItem[]>(`/api/v1/objects/${objId}/devices`).then((r) => r.data),
   })
 
+export const useDevice = (objId: number, deviceId: number) =>
+  useQuery({
+    queryKey: ['device', objId, deviceId],
+    queryFn: () =>
+      api.get<DeviceItem>(`/api/v1/objects/${objId}/devices/${deviceId}`).then((r) => r.data),
+    enabled: !!objId && !!deviceId,
+  })
+
 export interface ObjectCreatePayload {
   name: string
   description?: string
@@ -175,7 +192,10 @@ export const useUpdateDevice = (objId: number) => {
   return useMutation({
     mutationFn: ({ id, body }: { id: number; body: Partial<DeviceCreatePayload> }) =>
       api.patch<DeviceItem>(`/api/v1/objects/${objId}/devices/${id}`, body).then((r) => r.data),
-    onSuccess: () => qc.invalidateQueries({ queryKey: ['devices', objId] }),
+    onSuccess: (_, { id }) => {
+      qc.invalidateQueries({ queryKey: ['devices', objId] })
+      qc.invalidateQueries({ queryKey: ['device', objId, id] })
+    },
   })
 }
 
diff --git a/frontend/src/api/tasks.ts b/frontend/src/api/tasks.ts
index 035f86b..59513b0 100644
--- a/frontend/src/api/tasks.ts
+++ b/frontend/src/api/tasks.ts
@@ -78,3 +78,12 @@ export const useCreateTask = () =>
     mutationFn: (body: { type: string; target_scope: object; params: object }) =>
       api.post<Task>('/api/v1/tasks', body).then((r) => r.data),
   })
+
+export const useDeviceTasks = (deviceId: number) =>
+  useQuery({
+    queryKey: ['tasks', 'device', deviceId],
+    queryFn: () =>
+      api
+        .get<Task[]>('/api/v1/tasks', { params: { device_id: deviceId, limit: 100 } })
+        .then((r) => r.data),
+  })
diff --git a/frontend/src/components/DeviceEditModal.tsx b/frontend/src/components/DeviceEditModal.tsx
new file mode 100644
index 0000000..2848181
--- /dev/null
+++ b/frontend/src/components/DeviceEditModal.tsx
@@ -0,0 +1,209 @@
+import {
+  Checkbox,
+  Col,
+  Divider,
+  Form,
+  Input,
+  InputNumber,
+  Modal,
+  Row,
+  Select,
+  message,
+} from 'antd'
+import { useEffect } from 'react'
+import {
+  useCreateDevice,
+  useUpdateDevice,
+  type DeviceItem,
+} from '../api/objects'
+import { useRacks } from '../api/racks'
+import { stripEmpty } from '../utils/form'
+
+const DEVICE_CATEGORIES = [
+  { value: 'main_server', label: 'Главный сервер' },
+  { value: 'vm', label: 'Виртуалка / сервис' },
+  { value: 'router', label: 'Роутер / шлюз' },
+  { value: 'embedded', label: 'Пром-ПК (embedded)' },
+  { value: 'camera', label: 'Камера' },
+  { value: 'io_board', label: 'Модуль ввода/вывода' },
+  { value: 'bank_terminal', label: 'Банковский терминал' },
+  { value: 'cash_register', label: 'ККТ' },
+  { value: 'other', label: 'Другое' },
+]
+
+const DEVICE_ROLES = [
+  { value: 'plate', label: 'ГРЗ (номерная)' },
+  { value: 'face', label: 'Лицевая / обзорная' },
+  { value: 'overview', label: 'Обзорная (улица)' },
+  { value: 'other', label: 'Другое' },
+]
+
+const DEVICE_LOCATIONS = [
+  { value: 'server_room', label: 'Серверная' },
+  { value: 'street', label: 'Улица' },
+]
+
+interface Props {
+  open: boolean
+  device: DeviceItem | null
+  objId: number
+  onClose: () => void
+  onSaved?: (device: DeviceItem) => void
+}
+
+export function DeviceEditModal({ open, device, objId, onClose, onSaved }: Props) {
+  const [form] = Form.useForm()
+  const { data: racks } = useRacks(objId)
+  const createDevice = useCreateDevice(objId)
+  const updateDevice = useUpdateDevice(objId)
+
+  const rackOptions = (racks ?? []).map((r) => ({ value: r.id, label: r.name }))
+
+  useEffect(() => {
+    if (!open) return
+    if (device) {
+      form.setFieldsValue({
+        ip: device.ip,
+        hostname: device.hostname ?? '',
+        category: device.category,
+        role: device.role,
+        vendor: device.vendor ?? '',
+        model: device.model ?? '',
+        mac: device.mac ?? '',
+        rack_id: device.rack_id ?? undefined,
+        location: device.location ?? undefined,
+        monitor_enabled: device.monitor_enabled ?? false,
+        ssh_user_override: device.ssh_user_override ?? '',
+        ssh_port_override: device.ssh_port_override ?? undefined,
+      })
+    } else {
+      form.resetFields()
+    }
+  }, [open, device])
+
+  const handleOk = async () => {
+    const values = await form.validateFields()
+    const payload = stripEmpty(values)
+    if ('rack_id' in values && values.rack_id === undefined) {
+      payload.rack_id = null
+    }
+    try {
+      let saved: DeviceItem
+      if (device) {
+        saved = await updateDevice.mutateAsync({ id: device.id, body: payload as any })
+        message.success('Устройство обновлено')
+      } else {
+        saved = await createDevice.mutateAsync(payload as any)
+        message.success('Устройство добавлено')
+      }
+      form.resetFields()
+      onClose()
+      onSaved?.(saved)
+    } catch {
+      message.error(device ? 'Ошибка при обновлении' : 'Ошибка при добавлении')
+    }
+  }
+
+  const handleCancel = () => {
+    form.resetFields()
+    onClose()
+  }
+
+  return (
+    <Modal
+      title={device ? `Редактировать: ${device.hostname ?? device.ip}` : 'Добавить устройство'}
+      open={open}
+      onCancel={handleCancel}
+      onOk={handleOk}
+      confirmLoading={createDevice.isPending || updateDevice.isPending}
+      okText={device ? 'Сохранить' : 'Добавить'}
+      width={640}
+    >
+      <Form form={form} layout="vertical" style={{ marginTop: 16 }}>
+        <Row gutter={16}>
+          <Col span={12}>
+            <Form.Item name="ip" label="IP-адрес" rules={[{ required: true, message: 'Обязательное поле' }]}>
+              <Input placeholder="192.168.1.100" />
+            </Form.Item>
+          </Col>
+          <Col span={12}>
+            <Form.Item name="hostname" label="Hostname">
+              <Input placeholder="camera-01" />
+            </Form.Item>
+          </Col>
+        </Row>
+
+        <Row gutter={16}>
+          <Col span={12}>
+            <Form.Item name="category" label="Категория" rules={[{ required: true }]}>
+              <Select placeholder="Выберите категорию" options={DEVICE_CATEGORIES} />
+            </Form.Item>
+          </Col>
+          <Col span={12}>
+            <Form.Item name="role" label="Роль">
+              <Select placeholder="Выберите роль" allowClear options={DEVICE_ROLES} />
+            </Form.Item>
+          </Col>
+        </Row>
+
+        <Row gutter={16}>
+          <Col span={12}>
+            <Form.Item name="vendor" label="Производитель">
+              <Input placeholder="Iptronic, Овен, PAX..." />
+            </Form.Item>
+          </Col>
+          <Col span={12}>
+            <Form.Item name="model" label="Модель">
+              <Input placeholder="IPT-IPL1080S" />
+            </Form.Item>
+          </Col>
+        </Row>
+
+        <Row gutter={16}>
+          <Col span={12}>
+            <Form.Item name="rack_id" label="Стойка">
+              <Select placeholder="Без стойки" allowClear options={rackOptions} />
+            </Form.Item>
+          </Col>
+          <Col span={12}>
+            <Form.Item name="location" label="Локация (если не в стойке)">
+              <Select placeholder="Не задана" allowClear options={DEVICE_LOCATIONS} />
+            </Form.Item>
+          </Col>
+        </Row>
+
+        <Row gutter={16}>
+          <Col span={12}>
+            <Form.Item name="mac" label="MAC">
+              <Input placeholder="AA:BB:CC:DD:EE:FF" />
+            </Form.Item>
+          </Col>
+        </Row>
+
+        <Form.Item name="monitor_enabled" valuePropName="checked">
+          <Checkbox>Мониторинг (автоматический ping)</Checkbox>
+        </Form.Item>
+
+        <Divider orientation="left" plain>SSH (переопределить настройки объекта)</Divider>
+
+        <Row gutter={16}>
+          <Col span={8}>
+            <Form.Item name="ssh_user_override" label="Логин">
+              <Input placeholder="caps" />
+            </Form.Item>
+          </Col>
+          <Col span={10}>
+            <Form.Item name="ssh_password_override" label="Пароль">
+              <Input.Password placeholder="••••••••" />
+            </Form.Item>
+          </Col>
+          <Col span={6}>
+            <Form.Item name="ssh_port_override" label="Порт">
+              <InputNumber style={{ width: '100%' }} min={1} max={65535} placeholder="22" />
+            </Form.Item>
+          </Col>
+        </Row>
+      </Form>
+    </Modal>
+  )
+}
diff --git a/frontend/src/pages/DeviceDetail.tsx b/frontend/src/pages/DeviceDetail.tsx
new file mode 100644
index 0000000..a2b8639
--- /dev/null
+++ b/frontend/src/pages/DeviceDetail.tsx
@@ -0,0 +1,618 @@
+import {
+  CheckCircleOutlined,
+  ClockCircleOutlined,
+  DeleteOutlined,
+  EditOutlined,
+  EyeOutlined,
+} from '@ant-design/icons'
+import {
+  Badge,
+  Breadcrumb,
+  Button,
+  Card,
+  Col,
+  Descriptions,
+  Popconfirm,
+  Result,
+  Row,
+  Select,
+  Space,
+  Spin,
+  Table,
+  Tag,
+  Tooltip,
+  Typography,
+  message,
+} from 'antd'
+import dayjs from 'dayjs'
+import { useState } from 'react'
+import { useNavigate, useParams } from 'react-router-dom'
+import { useAlerts, useAcknowledgeAlert, useResolveAlert, type AlertItem } from '../api/alerts'
+import { useDevice, useDeleteDevice, useObject } from '../api/objects'
+import { useSnapshots, useSnapshotDiff } from '../api/snapshots'
+import { useDeviceTasks, useTask, type Task } from '../api/tasks'
+import { DeviceEditModal } from '../components/DeviceEditModal'
+import { CategoryTag, DeviceStatusBadge, TaskStatusBadge } from '../components/StatusBadge'
+import { useMonitorSSE } from '../hooks/useMonitorSSE'
+
+const ALERT_STATUS_COLOR: Record<string, string> = {
+  open: 'error',
+  acknowledged: 'warning',
+  resolved: 'success',
+}
+
+const ALERT_STATUS_LABEL: Record<string, string> = {
+  open: 'Открыт',
+  acknowledged: 'Подтверждён',
+  resolved: 'Закрыт',
+}
+
+const LOCATION_LABEL: Record<string, string> = {
+  server_room: 'Серверная',
+  street: 'Улица',
+}
+
+// ─── Alerts tab ─────────────────────────────────────────────────────────────
+
+function AlertsTab({ deviceId }: { deviceId: number }) {
+  const [statusFilter, setStatusFilter] = useState<string | undefined>(undefined)
+  const { data: alerts, isLoading } = useAlerts({ device_id: deviceId, status: statusFilter })
+  const acknowledge = useAcknowledgeAlert()
+  const resolve = useResolveAlert()
+
+  const columns = [
+    {
+      title: 'Сообщение',
+      dataIndex: 'message',
+      key: 'message',
+    },
+    {
+      title: 'Статус',
+      dataIndex: 'status',
+      key: 'status',
+      width: 140,
+      render: (s: string) => (
+        <Badge status={ALERT_STATUS_COLOR[s] as any} text={ALERT_STATUS_LABEL[s] ?? s} />
+      ),
+    },
+    {
+      title: 'Создан',
+      dataIndex: 'created_at',
+      key: 'created_at',
+      width: 160,
+      render: (v: string) => dayjs(v).format('DD.MM.YY HH:mm'),
+    },
+    {
+      title: 'Подтверждён',
+      dataIndex: 'acknowledged_by_username',
+      key: 'ack',
+      width: 140,
+      render: (v: string | null, row: AlertItem) =>
+        v ? (
+          <Tooltip title={row.acknowledged_at ? dayjs(row.acknowledged_at).format('DD.MM.YY HH:mm') : ''}>
+            <Typography.Text type="secondary">{v}</Typography.Text>
+          </Tooltip>
+        ) : '—',
+    },
+    {
+      title: '',
+      key: 'actions',
+      width: 120,
+      render: (_: unknown, row: AlertItem) => (
+        <Space size={4}>
+          {row.status === 'open' && (
+            <Tooltip title="Подтвердить">
+              <Button
+                size="small"
+                icon={<CheckCircleOutlined />}
+                loading={acknowledge.isPending}
+                onClick={() => acknowledge.mutateAsync(row.id).catch(() => message.error('Ошибка'))}
+              />
+            </Tooltip>
+          )}
+          {row.status !== 'resolved' && (
+            <Tooltip title="Закрыть">
+              <Button
+                size="small"
+                danger
+                icon={<DeleteOutlined />}
+                loading={resolve.isPending}
+                onClick={() => resolve.mutateAsync(row.id).catch(() => message.error('Ошибка'))}
+              />
+            </Tooltip>
+          )}
+        </Space>
+      ),
+    },
+  ]
+
+  return (
+    <>
+      <div style={{ marginBottom: 12 }}>
+        <Select
+          placeholder="Все статусы"
+          allowClear
+          style={{ width: 180 }}
+          value={statusFilter}
+          onChange={setStatusFilter}
+          options={[
+            { value: 'open', label: 'Открытые' },
+            { value: 'acknowledged', label: 'Подтверждённые' },
+            { value: 'resolved', label: 'Закрытые' },
+          ]}
+        />
+      </div>
+      <Table
+        dataSource={alerts ?? []}
+        columns={columns}
+        rowKey="id"
+        loading={isLoading}
+        size="small"
+        pagination={{ pageSize: 20 }}
+        locale={{ emptyText: 'Нет алертов' }}
+      />
+    </>
+  )
+}
+
+// ─── Snapshots tab ───────────────────────────────────────────────────────────
+
+function SnapshotsTab({ objId, deviceId }: { objId: number; deviceId: number }) {
+  const { data: snapshots, isLoading } = useSnapshots(objId, { device_id: deviceId })
+  const [selectedA, setSelectedA] = useState<number | null>(null)
+  const [selectedB, setSelectedB] = useState<number | null>(null)
+  const { data: diffData, isFetching: diffLoading } = useSnapshotDiff(objId, selectedA, selectedB)
+
+  const snapshotOptions = (snapshots ?? []).map((s) => ({
+    value: s.id,
+    label: `${dayjs(s.created_at).format('DD.MM.YY HH:mm')} — ${s.sha256.slice(0, 8)}`,
+  }))
+
+  const columns = [
+    {
+      title: 'Дата',
+      dataIndex: 'created_at',
+      key: 'created_at',
+      width: 160,
+      render: (v: string) => dayjs(v).format('DD.MM.YY HH:mm:ss'),
+    },
+    {
+      title: 'SHA-256',
+      dataIndex: 'sha256',
+      key: 'sha256',
+      render: (v: string) => (
+        <Tooltip title={v}>
+          <code>{v.slice(0, 12)}…</code>
+        </Tooltip>
+      ),
+    },
+    {
+      title: 'Размер',
+      dataIndex: 'size',
+      key: 'size',
+      width: 100,
+      render: (v: number) => `${v} Б`,
+    },
+    {
+      title: 'Метка',
+      dataIndex: 'label',
+      key: 'label',
+      render: (v: string | null) => v ?? '—',
+    },
+  ]
+
+  const renderDiff = (diff: string) => {
+    if (!diff) return <Typography.Text type="secondary">Нет изменений</Typography.Text>
+    return (
+      <pre style={{ fontSize: 12, maxHeight: 500, overflow: 'auto', background: '#fafafa', padding: 12, border: '1px solid #e8e8e8', borderRadius: 6 }}>
+        {diff.split('\n').map((line, i) => {
+          let color = 'inherit'
+          if (line.startsWith('+') && !line.startsWith('+++')) color = '#237804'
+          else if (line.startsWith('-') && !line.startsWith('---')) color = '#a8071a'
+          else if (line.startsWith('@@')) color = '#096dd9'
+          return (
+            <span key={i} style={{ color, display: 'block' }}>{line}</span>
+          )
+        })}
+      </pre>
+    )
+  }
+
+  return (
+    <>
+      <Table
+        dataSource={snapshots ?? []}
+        columns={columns}
+        rowKey="id"
+        loading={isLoading}
+        size="small"
+        pagination={{ pageSize: 20 }}
+        locale={{ emptyText: 'Снапшоты не найдены' }}
+        style={{ marginBottom: 24 }}
+      />
+
+      <Typography.Title level={5} style={{ marginBottom: 12 }}>Сравнить снапшоты</Typography.Title>
+      <Space style={{ marginBottom: 16 }} wrap>
+        <Select
+          placeholder="Снапшот A (старый)"
+          style={{ width: 280 }}
+          options={snapshotOptions}
+          value={selectedA}
+          onChange={setSelectedA}
+          allowClear
+        />
+        <Select
+          placeholder="Снапшот B (новый)"
+          style={{ width: 280 }}
+          options={snapshotOptions}
+          value={selectedB}
+          onChange={setSelectedB}
+          allowClear
+        />
+      </Space>
+
+      {diffLoading && <Spin />}
+      {diffData && !diffLoading && (
+        diffData.is_identical
+          ? <Typography.Text type="secondary">Снапшоты идентичны</Typography.Text>
+          : renderDiff(diffData.diff)
+      )}
+    </>
+  )
+}
+
+// ─── Tasks tab ───────────────────────────────────────────────────────────────
+
+function TaskResultRow({ taskId, deviceId }: { taskId: string; deviceId: number }) {
+  const { data: detail, isLoading } = useTask(taskId)
+  const deviceResult = detail?.device_results.find((r) => r.device_id === deviceId)
+
+  if (isLoading) return <Spin size="small" />
+  if (!deviceResult) return <Typography.Text type="secondary">Нет данных</Typography.Text>
+
+  return (
+    <div style={{ padding: '8px 16px', background: '#fafafa', borderRadius: 4 }}>
+      <Space size={16} style={{ marginBottom: 8 }}>
+        <span><b>Статус:</b> {deviceResult.status}</span>
+        {deviceResult.exit_code !== null && <span><b>Код:</b> {deviceResult.exit_code}</span>}
+        {deviceResult.duration_ms !== null && <span><b>Время:</b> {deviceResult.duration_ms}мс</span>}
+        {deviceResult.executed_at && (
+          <span><b>Выполнено:</b> {dayjs(deviceResult.executed_at).format('DD.MM.YY HH:mm:ss')}</span>
+        )}
+      </Space>
+      {deviceResult.stdout && (
+        <pre style={{ fontSize: 11, maxHeight: 200, overflow: 'auto', background: '#fff', padding: 8, border: '1px solid #e8e8e8', borderRadius: 4, marginBottom: 4 }}>
+          {deviceResult.stdout}
+        </pre>
+      )}
+      {deviceResult.stderr && (
+        <pre style={{ fontSize: 11, maxHeight: 100, overflow: 'auto', background: '#fff4f4', padding: 8, border: '1px solid #ffa39e', borderRadius: 4, color: '#a8071a' }}>
+          {deviceResult.stderr}
+        </pre>
+      )}
+      {deviceResult.data && Object.keys(deviceResult.data).length > 0 && (
+        <pre style={{ fontSize: 11, maxHeight: 200, overflow: 'auto', background: '#f6ffed', padding: 8, border: '1px solid #b7eb8f', borderRadius: 4 }}>
+          {JSON.stringify(deviceResult.data, null, 2)}
+        </pre>
+      )}
+    </div>
+  )
+}
+
+function TasksTab({ deviceId }: { deviceId: number }) {
+  const navigate = useNavigate()
+  const { data: tasks, isLoading } = useDeviceTasks(deviceId)
+
+  const columns = [
+    {
+      title: 'Тип',
+      dataIndex: 'type',
+      key: 'type',
+      render: (v: string) => <code style={{ fontSize: 12 }}>{v}</code>,
+    },
+    {
+      title: 'Статус',
+      dataIndex: 'status',
+      key: 'status',
+      width: 140,
+      render: (v: string) => <TaskStatusBadge status={v} />,
+    },
+    {
+      title: 'Цель',
+      dataIndex: 'target_label',
+      key: 'target_label',
+      render: (v: string | null) => v ?? '—',
+    },
+    {
+      title: 'Создана',
+      dataIndex: 'created_at',
+      key: 'created_at',
+      width: 160,
+      render: (v: string) => dayjs(v).format('DD.MM.YY HH:mm'),
+    },
+    {
+      title: 'Завершена',
+      dataIndex: 'finished_at',
+      key: 'finished_at',
+      width: 160,
+      render: (v: string | null) => v ? dayjs(v).format('DD.MM.YY HH:mm') : '—',
+    },
+    {
+      title: '',
+      key: 'actions',
+      width: 80,
+      render: (_: unknown, row: Task) => (
+        <Tooltip title="Открыть задачу">
+          <Button
+            size="small"
+            icon={<EyeOutlined />}
+            onClick={() => navigate(`/tasks/${row.id}`)}
+          />
+        </Tooltip>
+      ),
+    },
+  ]
+
+  return (
+    <Table
+      dataSource={tasks ?? []}
+      columns={columns}
+      rowKey="id"
+      loading={isLoading}
+      size="small"
+      pagination={{ pageSize: 20 }}
+      locale={{ emptyText: 'Задачи не найдены' }}
+      expandable={{
+        expandedRowRender: (row: Task) => (
+          <TaskResultRow taskId={row.id} deviceId={deviceId} />
+        ),
+      }}
+    />
+  )
+}
+
+// ─── Main page ───────────────────────────────────────────────────────────────
+
+export function DeviceDetailPage() {
+  const { id: objIdStr, deviceId: deviceIdStr } = useParams<{ id: string; deviceId: string }>()
+  const objId = Number(objIdStr)
+  const deviceId = Number(deviceIdStr)
+  const navigate = useNavigate()
+
+  const { data: obj } = useObject(objId)
+  const { data: device, isLoading } = useDevice(objId, deviceId)
+  const deleteDevice = useDeleteDevice(objId)
+
+  const [editOpen, setEditOpen] = useState(false)
+  const [activeTab, setActiveTab] = useState('info')
+  const [liveStatus, setLiveStatus] = useState<{ status: string; ping_ms: number | null } | null>(null)
+
+  useMonitorSSE({
+    onDeviceStatus: (ev) => {
+      if (ev.device_id === deviceId) {
+        setLiveStatus({ status: ev.status, ping_ms: ev.ping_ms })
+      }
+    },
+  })
+
+  const effectiveStatus = liveStatus?.status ?? device?.status ?? 'unknown'
+  const effectivePing = liveStatus !== null ? liveStatus.ping_ms : (device?.last_ping_ms ?? null)
+
+  const handleDelete = async () => {
+    try {
+      await deleteDevice.mutateAsync(deviceId)
+      message.success('Устройство удалено')
+      navigate(`/inventory/objects/${objId}`)
+    } catch {
+      message.error('Ошибка при удалении')
+    }
+  }
+
+  if (isLoading) return <Spin style={{ display: 'block', marginTop: 48 }} />
+  if (!device) return <Result status="404" title="Устройство не найдено" extra={<Button onClick={() => navigate(`/inventory/objects/${objId}`)}>К объекту</Button>} />
+
+  const breadcrumbItems = [
+    { title: <a onClick={() => navigate('/inventory/objects')}>Инвентарь</a> },
+    ...(obj?.city ? [{ title: <a onClick={() => navigate('/inventory/objects')}>{obj.city}</a> }] : []),
+    { title: <a onClick={() => navigate(`/inventory/objects/${objId}`)}>{obj?.name ?? `Объект #${objId}`}</a> },
+    { title: device.ip },
+  ]
+
+  const tabItems = [
+    {
+      key: 'info',
+      label: 'Основное',
+      children: (
+        <Row gutter={24}>
+          <Col xs={24} lg={14}>
+            <Descriptions bordered size="small" column={1} labelStyle={{ width: 180 }}>
+              <Descriptions.Item label="IP"><code>{device.ip}</code></Descriptions.Item>
+              <Descriptions.Item label="Hostname">{device.hostname ?? '—'}</Descriptions.Item>
+              <Descriptions.Item label="MAC">{device.mac ?? '—'}</Descriptions.Item>
+              <Descriptions.Item label="Производитель">{device.vendor ?? '—'}</Descriptions.Item>
+              <Descriptions.Item label="Модель">{device.model ?? '—'}</Descriptions.Item>
+              <Descriptions.Item label="Прошивка">{device.firmware_version ?? '—'}</Descriptions.Item>
+              <Descriptions.Item label="Категория"><CategoryTag category={device.category} /></Descriptions.Item>
+              <Descriptions.Item label="Роль">{device.role !== 'other' ? device.role : '—'}</Descriptions.Item>
+              <Descriptions.Item label="Источник">
+                <Typography.Text type="secondary">{device.source}</Typography.Text>
+              </Descriptions.Item>
+              {device.external_id && (
+                <Descriptions.Item label="External ID">
+                  <code>{device.external_id}</code>
+                </Descriptions.Item>
+              )}
+            </Descriptions>
+
+            <Descriptions bordered size="small" column={1} labelStyle={{ width: 180 }} style={{ marginTop: 16 }}>
+              <Descriptions.Item label="Объект">
+                <a onClick={() => navigate(`/inventory/objects/${objId}`)}>{obj?.name ?? `#${objId}`}</a>
+              </Descriptions.Item>
+              <Descriptions.Item label="Стойка">
+                {device.rack_name ? <Tag color="blue">{device.rack_name}{device.rack_type ? ` ${device.rack_type}` : ''}</Tag> : '—'}
+              </Descriptions.Item>
+              <Descriptions.Item label="Локация">
+                {device.location ? (LOCATION_LABEL[device.location] ?? device.location) : '—'}
+              </Descriptions.Item>
+            </Descriptions>
+
+            <Descriptions bordered size="small" column={1} labelStyle={{ width: 180 }} style={{ marginTop: 16 }}>
+              <Descriptions.Item label="Статус"><DeviceStatusBadge status={effectiveStatus} /></Descriptions.Item>
+              <Descriptions.Item label="Последний ping">
+                {device.last_seen ? (
+                  <Tooltip title={dayjs(device.last_seen).format('DD.MM.YYYY HH:mm:ss')}>
+                    <Space size={4}>
+                      <ClockCircleOutlined style={{ color: '#999' }} />
+                      <span>{effectivePing !== null ? `${effectivePing}мс` : '—'}</span>
+                    </Space>
+                  </Tooltip>
+                ) : '—'}
+              </Descriptions.Item>
+              <Descriptions.Item label="Мониторинг">
+                {device.monitor_enabled
+                  ? <Tag color="green">Включён</Tag>
+                  : <Tag>Выключен</Tag>}
+              </Descriptions.Item>
+            </Descriptions>
+
+            {(device.ssh_user_override || device.ssh_port_override) && (
+              <Descriptions bordered size="small" column={1} labelStyle={{ width: 180 }} style={{ marginTop: 16 }}>
+                {device.ssh_user_override && (
+                  <Descriptions.Item label="SSH логин (override)">{device.ssh_user_override}</Descriptions.Item>
+                )}
+                {device.ssh_port_override && (
+                  <Descriptions.Item label="SSH порт (override)">{device.ssh_port_override}</Descriptions.Item>
+                )}
+              </Descriptions>
+            )}
+
+            {device.notes && (
+              <Card size="small" title="Заметки" style={{ marginTop: 16 }}>
+                <Typography.Text>{device.notes}</Typography.Text>
+              </Card>
+            )}
+
+            <Descriptions bordered size="small" column={2} style={{ marginTop: 16 }}>
+              <Descriptions.Item label="Создано">
+                {dayjs(device.created_at).format('DD.MM.YYYY HH:mm')}
+              </Descriptions.Item>
+              <Descriptions.Item label="Обновлено">
+                {dayjs(device.updated_at).format('DD.MM.YYYY HH:mm')}
+              </Descriptions.Item>
+            </Descriptions>
+          </Col>
+
+          <Col xs={24} lg={10}>
+            {device.capabilities.length > 0 && (
+              <Card size="small" title="Возможности" style={{ marginBottom: 16 }}>
+                <Space wrap>
+                  {device.capabilities.map((c) => <Tag key={c}>{c}</Tag>)}
+                </Space>
+              </Card>
+            )}
+
+            {device.device_meta && Object.keys(device.device_meta).length > 0 && (
+              <Card size="small" title="Метаданные устройства" style={{ marginBottom: 16 }}>
+                <pre style={{ fontSize: 11, margin: 0, maxHeight: 300, overflow: 'auto' }}>
+                  {JSON.stringify(device.device_meta, null, 2)}
+                </pre>
+              </Card>
+            )}
+
+            {device.connection_params && Object.keys(device.connection_params).length > 0 && (
+              <Card size="small" title="Параметры подключения">
+                <pre style={{ fontSize: 11, margin: 0, maxHeight: 300, overflow: 'auto' }}>
+                  {JSON.stringify(device.connection_params, null, 2)}
+                </pre>
+              </Card>
+            )}
+          </Col>
+        </Row>
+      ),
+    },
+    {
+      key: 'alerts',
+      label: 'Алерты',
+      children: <AlertsTab deviceId={deviceId} />,
+    },
+    {
+      key: 'snapshots',
+      label: 'Снапшоты',
+      children: <SnapshotsTab objId={objId} deviceId={deviceId} />,
+    },
+    {
+      key: 'tasks',
+      label: 'История задач',
+      children: <TasksTab deviceId={deviceId} />,
+    },
+  ]
+
+  return (
+    <div>
+      <Breadcrumb style={{ marginBottom: 16 }} items={breadcrumbItems} />
+
+      <Card style={{ marginBottom: 16 }}>
+        <Row justify="space-between" align="top">
+          <Col>
+            <Space align="baseline" size={12}>
+              <Typography.Title level={3} style={{ margin: 0 }}>
+                <code>{device.ip}</code>
+              </Typography.Title>
+              <DeviceStatusBadge status={effectiveStatus} />
+              {effectivePing !== null && (
+                <Typography.Text type="secondary">{effectivePing}мс</Typography.Text>
+              )}
+            </Space>
+            {device.hostname && (
+              <div>
+                <Typography.Text type="secondary" style={{ fontSize: 14 }}>{device.hostname}</Typography.Text>
+              </div>
+            )}
+            <Space style={{ marginTop: 8 }} wrap>
+              <CategoryTag category={device.category} />
+              {device.role && device.role !== 'other' && <Tag>{device.role}</Tag>}
+              {device.rack_name && <Tag color="blue">{device.rack_name}</Tag>}
+              {device.vendor && <Tag color="default">{device.vendor}</Tag>}
+              {device.model && <Typography.Text type="secondary" style={{ fontSize: 13 }}>{device.model}</Typography.Text>}
+            </Space>
+          </Col>
+          <Col>
+            <Space>
+              <Button icon={<EditOutlined />} onClick={() => setEditOpen(true)}>
+                Редактировать
+              </Button>
+              <Popconfirm
+                title="Удалить устройство?"
+                description="Это действие необратимо."
+                okText="Удалить"
+                cancelText="Отмена"
+                okButtonProps={{ danger: true }}
+                onConfirm={handleDelete}
+              >
+                <Button danger icon={<DeleteOutlined />} loading={deleteDevice.isPending}>
+                  Удалить
+                </Button>
+              </Popconfirm>
+            </Space>
+          </Col>
+        </Row>
+      </Card>
+
+      <Card
+        tabList={tabItems.map((t) => ({ key: t.key, tab: t.label }))}
+        activeTabKey={activeTab}
+        onTabChange={setActiveTab}
+        bodyStyle={{ paddingTop: 16 }}
+      >
+        {tabItems.find((t) => t.key === activeTab)?.children}
+      </Card>
+
+      <DeviceEditModal
+        open={editOpen}
+        device={device}
+        objId={objId}
+        onClose={() => setEditOpen(false)}
+      />
+    </div>
+  )
+}
diff --git a/frontend/src/pages/InventoryObjectDetail.tsx b/frontend/src/pages/InventoryObjectDetail.tsx
index 7b2ef9a..9390737 100644
--- a/frontend/src/pages/InventoryObjectDetail.tsx
+++ b/frontend/src/pages/InventoryObjectDetail.tsx
@@ -2,6 +2,7 @@ import {
   ApiOutlined,
   DeleteOutlined,
   EditOutlined,
+  EyeOutlined,
   FileTextOutlined,
   GoogleOutlined,
   PlusOutlined,
@@ -13,13 +14,10 @@ import {
   Alert,
   Breadcrumb,
   Button,
-  Checkbox,
   Col,
   Descriptions,
-  Divider,
   Form,
   Input,
-  InputNumber,
   Modal,
   Popconfirm,
   Row,
@@ -38,12 +36,10 @@ import { useMemo, useState } from 'react'
 import { useQueryClient } from '@tanstack/react-query'
 import { useNavigate, useParams } from 'react-router-dom'
 import {
-  useCreateDevice,
   useDeleteDevice,
   useDeleteAllDevices,
   useForceDeleteObject,
   useDiscoverObject,
-  useUpdateDevice,
   useDevices,
   useImportCSV,
   useObject,
@@ -56,6 +52,7 @@ import {
 import { useRacks, useCreateRack, useUpdateRack, useDeleteRack, type RackItem } from '../api/racks'
 import { useZones, useCreateZone, useDeleteZone, type ZoneItem } from '../api/zones'
 import { CategoryTag, DeviceStatusBadge } from '../components/StatusBadge'
+import { DeviceEditModal } from '../components/DeviceEditModal'
 import { DiscoveryDrawer } from '../components/DiscoveryDrawer'
 import { stripEmpty } from '../utils/form'
 import dayjs from 'dayjs'
@@ -70,29 +67,6 @@ type GroupRow = { _type: 'group'; _key: string; label: string; count: number; on
 type DeviceRow = DeviceItem & { _type: 'device' }
 type TableRow = GroupRow | DeviceRow
 
-const DEVICE_CATEGORIES = [
-  { value: 'main_server', label: 'Главный сервер' },
-  { value: 'vm', label: 'Виртуалка / сервис' },
-  { value: 'router', label: 'Роутер / шлюз' },
-  { value: 'embedded', label: 'Пром-ПК (embedded)' },
-  { value: 'camera', label: 'Камера' },
-  { value: 'io_board', label: 'Модуль ввода/вывода' },
-  { value: 'bank_terminal', label: 'Банковский терминал' },
-  { value: 'cash_register', label: 'ККТ' },
-  { value: 'other', label: 'Другое' },
-]
-
-const DEVICE_ROLES = [
-  { value: 'plate', label: 'ГРЗ (номерная)' },
-  { value: 'face', label: 'Лицевая / обзорная' },
-  { value: 'overview', label: 'Обзорная (улица)' },
-  { value: 'other', label: 'Другое' },
-]
-
-const DEVICE_LOCATIONS = [
-  { value: 'server_room', label: 'Серверная' },
-  { value: 'street', label: 'Улица' },
-]
 
 export function InventoryObjectDetailPage() {
   const { id } = useParams<{ id: string }>()
@@ -107,8 +81,6 @@ export function InventoryObjectDetailPage() {
   const syncMutation = useSyncObject(objId)
   const discoverMutation = useDiscoverObject(objId)
   const syncSheetsMutation = useSyncSheets(objId)
-  const createDevice = useCreateDevice(objId)
-  const updateDevice = useUpdateDevice(objId)
   const deleteDevice = useDeleteDevice(objId)
   const previewCSV = usePreviewCSV(objId)
   const importCSV = useImportCSV(objId)
@@ -132,17 +104,11 @@ export function InventoryObjectDetailPage() {
   const [csvPreview, setCsvPreview] = useState<DeviceImportPreview | null>(null)
   const [searchText, setSearchText] = useState('')
 
-  const [deviceForm] = Form.useForm()
   const [rackForm] = Form.useForm()
   const [zoneForm] = Form.useForm()
   const [sheetsForm] = Form.useForm()
   const [editRackForm] = Form.useForm()
 
-  const rackOptions = useMemo(
-    () => (racks ?? []).map((r) => ({ value: r.id, label: r.name })),
-    [racks]
-  )
-
   const handleSync = async () => {
     try {
       const result = await syncMutation.mutateAsync()
@@ -183,53 +149,15 @@ export function InventoryObjectDetailPage() {
   }
 
   const openAddDevice = () => {
-    deviceForm.resetFields()
     setEditDevice(null)
     setDeviceModal(true)
   }
 
   const openEditDevice = (row: DeviceItem) => {
-    deviceForm.resetFields()
-    deviceForm.setFieldsValue({
-      ip: row.ip,
-      hostname: row.hostname ?? '',
-      category: row.category,
-      role: row.role,
-      vendor: (row as any).vendor ?? '',
-      model: row.model ?? '',
-      mac: row.mac ?? '',
-      rack_id: row.rack_id ?? undefined,
-      location: (row as any).location ?? undefined,
-      monitor_enabled: row.monitor_enabled ?? false,
-      ssh_user_override: row.ssh_user_override ?? '',
-      ssh_port_override: row.ssh_port_override ?? undefined,
-    })
     setEditDevice(row)
     setDeviceModal(true)
   }
 
-  const handleSaveDevice = async () => {
-    const values = await deviceForm.validateFields()
-    const payload = stripEmpty(values)
-    if ('rack_id' in values && values.rack_id === undefined) {
-      payload.rack_id = null
-    }
-    try {
-      if (editDevice) {
-        await updateDevice.mutateAsync({ id: editDevice.id, body: payload as any })
-        message.success('Устройство обновлено')
-      } else {
-        await createDevice.mutateAsync(payload as any)
-        message.success('Устройство добавлено')
-      }
-      setDeviceModal(false)
-      setEditDevice(null)
-      deviceForm.resetFields()
-    } catch {
-      message.error(editDevice ? 'Ошибка при обновлении' : 'Ошибка при добавлении')
-    }
-  }
-
   const handleDeleteDevice = async (row: DeviceItem) => {
     try {
       await deleteDevice.mutateAsync(row.id)
@@ -407,7 +335,17 @@ export function InventoryObjectDetailPage() {
             </Space>
           )
         }
-        return <code>{(row as DeviceRow).ip}</code>
+        const d = row as DeviceRow
+        return (
+          <Space size={4}>
+            <code
+              style={{ cursor: 'pointer', color: '#1677ff' }}
+              onClick={() => navigate(`/inventory/objects/${objId}/devices/${d.id}`)}
+            >
+              {d.ip}
+            </code>
+          </Space>
+        )
       },
     },
     {
@@ -485,6 +423,9 @@ export function InventoryObjectDetailPage() {
         const d = row as DeviceRow
         return (
           <Space>
+            <Tooltip title="Карточка устройства">
+              <Button size="small" icon={<EyeOutlined />} onClick={() => navigate(`/inventory/objects/${objId}/devices/${d.id}`)} />
+            </Tooltip>
             <Button size="small" icon={<EditOutlined />} onClick={() => openEditDevice(d)} />
             <Popconfirm
               title="Удалить устройство?"
@@ -784,102 +725,12 @@ export function InventoryObjectDetailPage() {
         )}
       </Modal>
 
-      {/* Add / Edit Device Modal */}
-      <Modal
-        title={editDevice ? `Редактировать: ${editDevice.hostname ?? editDevice.ip}` : 'Добавить устройство'}
+      <DeviceEditModal
         open={deviceModal}
-        onCancel={() => { setDeviceModal(false); setEditDevice(null); deviceForm.resetFields() }}
-        onOk={handleSaveDevice}
-        confirmLoading={createDevice.isPending || updateDevice.isPending}
-        okText={editDevice ? 'Сохранить' : 'Добавить'}
-        width={640}
-      >
-        <Form form={deviceForm} layout="vertical" style={{ marginTop: 16 }}>
-          <Row gutter={16}>
-            <Col span={12}>
-              <Form.Item name="ip" label="IP-адрес" rules={[{ required: true, message: 'Обязательное поле' }]}>
-                <Input placeholder="192.168.1.100" />
-              </Form.Item>
-            </Col>
-            <Col span={12}>
-              <Form.Item name="hostname" label="Hostname">
-                <Input placeholder="camera-01" />
-              </Form.Item>
-            </Col>
-          </Row>
-
-          <Row gutter={16}>
-            <Col span={12}>
-              <Form.Item name="category" label="Категория" rules={[{ required: true }]}>
-                <Select placeholder="Выберите категорию" options={DEVICE_CATEGORIES} />
-              </Form.Item>
-            </Col>
-            <Col span={12}>
-              <Form.Item name="role" label="Роль">
-                <Select placeholder="Выберите роль" allowClear options={DEVICE_ROLES} />
-              </Form.Item>
-            </Col>
-          </Row>
-
-          <Row gutter={16}>
-            <Col span={12}>
-              <Form.Item name="vendor" label="Производитель">
-                <Input placeholder="Iptronic, Овен, PAX..." />
-              </Form.Item>
-            </Col>
-            <Col span={12}>
-              <Form.Item name="model" label="Модель">
-                <Input placeholder="IPT-IPL1080S" />
-              </Form.Item>
-            </Col>
-          </Row>
-
-          <Row gutter={16}>
-            <Col span={12}>
-              <Form.Item name="rack_id" label="Стойка">
-                <Select placeholder="Без стойки" allowClear options={rackOptions} />
-              </Form.Item>
-            </Col>
-            <Col span={12}>
-              <Form.Item name="location" label="Локация (если не в стойке)">
-                <Select placeholder="Не задана" allowClear options={DEVICE_LOCATIONS} />
-              </Form.Item>
-            </Col>
-          </Row>
-
-          <Row gutter={16}>
-            <Col span={12}>
-              <Form.Item name="mac" label="MAC">
-                <Input placeholder="AA:BB:CC:DD:EE:FF" />
-              </Form.Item>
-            </Col>
-          </Row>
-
-          <Form.Item name="monitor_enabled" valuePropName="checked">
-            <Checkbox>Мониторинг (автоматический ping)</Checkbox>
-          </Form.Item>
-
-          <Divider orientation="left" plain>SSH (переопределить настройки объекта)</Divider>
-
-          <Row gutter={16}>
-            <Col span={8}>
-              <Form.Item name="ssh_user_override" label="Логин">
-                <Input placeholder="caps" />
-              </Form.Item>
-            </Col>
-            <Col span={10}>
-              <Form.Item name="ssh_password_override" label="Пароль">
-                <Input.Password placeholder="••••••••" />
-              </Form.Item>
-            </Col>
-            <Col span={6}>
-              <Form.Item name="ssh_port_override" label="Порт">
-                <InputNumber style={{ width: '100%' }} min={1} max={65535} placeholder="22" />
-              </Form.Item>
-            </Col>
-          </Row>
-        </Form>
-      </Modal>
+        device={editDevice}
+        objId={objId}
+        onClose={() => { setDeviceModal(false); setEditDevice(null) }}
+      />
 
       <DiscoveryDrawer
         open={discoveryOpen}