feat(webhook): Phase 4 — admin-ui /webhooks page

Routes:
- /webhooks (layout) → /webhooks/index (list) + /webhooks/$id (detail)
- nav link добавлен в __root.tsx между Outbox и Language switch

List page (webhooks.index.tsx):
- Table: name | URL | scope filter (colored dots) | dictionaries | status
- ScopeChips reuse SCOPE_DOT из lib/scope-style.ts (consistency с
  dictionaries scope coloring)
- Create dialog: name, URL, scope filter (MultiSelect), dictionary &
  event type (CSV inputs), description. Client-side validation
  (URL scheme, name required) дублирует server-side @Pattern.
- Secret reveal modal после create: warning + plaintext + copy button.
  Single-time view — после закрытия secret не получить, только rotate.

Detail page (webhooks.$id.tsx):
- Subscription metadata grid (URL, status, filters, masked secret,
  createdBy + timestamp)
- Action buttons: rotate-secret + delete (с confirmation)
- Delivery history table: outboxEventId | status badge (delivered/
  retrying/pending/dlq) | attempts | last attempt | HTTP code | error
- Pagination 50/page
- Status badges: delivered=success, retrying=warning, pending=neutral,
  dlq=error

API client (queries + mutations):
- 4 queries: subscriptions list, subscription by id, deliveries page,
  DLQ page (last unused в UI пока, но готов для admin DLQ tab)
- 4 mutations: create, update, delete, rotateSecret. Все invalidate
  правильные query keys.

i18n: 50 ключей × 2 локали (ru-RU + en-US) под webhooks.*

ordinis-admin-ui/src/api/queries.ts

@@ -9,6 +9,8 @@ import {
   type FlattenedRecord,
   type OutboxStats,
   type RecordResponse,
+  type WebhookDeliveryPage,
+  type WebhookSubscription,
 } from './client'
 
 export const dictionariesQuery = queryOptions({
@@ -135,6 +137,70 @@ export const dlqQuery = (page: number, size: number) =>
 
 export const useDlq = (page: number, size: number) => useQuery(dlqQuery(page, size))
 
+// === Webhooks (v2) ===
+
+export const webhookSubscriptionsQuery = queryOptions({
+  queryKey: ['webhooks', 'subscriptions'] as const,
+  queryFn: async (): Promise<WebhookSubscription[]> => {
+    const { data } = await apiClient.get<WebhookSubscription[]>(
+      '/admin/webhooks/subscriptions',
+    )
+    return data
+  },
+})
+
+export const useWebhookSubscriptions = () => useQuery(webhookSubscriptionsQuery)
+
+export const webhookSubscriptionQuery = (id: string) =>
+  queryOptions({
+    queryKey: ['webhooks', 'subscriptions', id] as const,
+    queryFn: async (): Promise<WebhookSubscription> => {
+      const { data } = await apiClient.get<WebhookSubscription>(
+        `/admin/webhooks/subscriptions/${encodeURIComponent(id)}`,
+      )
+      return data
+    },
+  })
+
+export const useWebhookSubscription = (id: string) =>
+  useQuery({
+    ...webhookSubscriptionQuery(id),
+    enabled: Boolean(id),
+  })
+
+export const webhookDeliveriesQuery = (id: string, page: number, size: number) =>
+  queryOptions({
+    queryKey: ['webhooks', 'deliveries', id, page, size] as const,
+    queryFn: async (): Promise<WebhookDeliveryPage> => {
+      const { data } = await apiClient.get<WebhookDeliveryPage>(
+        `/admin/webhooks/subscriptions/${encodeURIComponent(id)}/deliveries`,
+        { params: { page, size } },
+      )
+      return data
+    },
+  })
+
+export const useWebhookDeliveries = (id: string, page: number, size: number) =>
+  useQuery({
+    ...webhookDeliveriesQuery(id, page, size),
+    enabled: Boolean(id),
+  })
+
+export const webhookDlqQuery = (page: number, size: number) =>
+  queryOptions({
+    queryKey: ['webhooks', 'dlq', page, size] as const,
+    queryFn: async (): Promise<WebhookDeliveryPage> => {
+      const { data } = await apiClient.get<WebhookDeliveryPage>(
+        '/admin/webhooks/deliveries/dlq',
+        { params: { page, size } },
+      )
+      return data
+    },
+  })
+
+export const useWebhookDlq = (page: number, size: number) =>
+  useQuery(webhookDlqQuery(page, size))
+
 export const useDictionaries = () => useQuery(dictionariesQuery)
 export const useDictionaryDetail = (name: string) => useQuery(dictionaryDetailQuery(name))
 export const useRecords = (dictionaryName: string, scopeCsv: string) =>