fix(i18n): eliminate all raw translation key leaks across admin pages

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

- Audited every 'key | translate' and translateService.t() usage under features/admin against en/ru/hy; 37 static keys and 8 dynamic namespaces were missing and rendered as raw keys
- Added full adminTransactions namespace (was entirely absent), adminUsers table/invite/session keys with scopeValue/statusValue/invitationStatus maps, adminMonitoring section titles and categoryValue/queueStatus/webhookStatus/levelValue maps, adminAnalytics.topProducts, adminProducts.variants/archived
- Resolved leaf/object key conflicts: dynamic 'adminMonitoring.category.*' renamed to categoryValue.*, 'adminTransactions.type.*' to typeValue.* so the leaf labels translate correctly
- Monitoring event severity now translated (levelValue) instead of raw English enum
- Merchant wording over technical: 'Background queues', 'Webhook deliveries', 'Activity log', 'Running smoothly/Slowed down/Stopped'
- Verified zero missing keys in en/ru/hy via AST-level key extraction

src/app/i18n/en.ts

@@ -1535,6 +1535,8 @@ export const en: Translations = {
     addVariant: 'Add variant',
     variantName: 'Variant name',
     variantsHint: 'Each variant is a purchasable option of this product, e.g. a size or color, with its own price and stock.',
+    variants: 'Variants',
+    archived: 'Archived',
     seoExplain: 'This is what shows up in search results — a clear title and description help customers find this product.',
     searchTitle: 'Search title',
     searchTitleHint: 'The headline shown in search results. Keep it short and descriptive.',
@@ -1590,10 +1592,98 @@ export const en: Translations = {
     emptyTitle: 'No users found',
     emptyDescription: 'Invite a teammate to get started.',
     invitationsEmptyTitle: 'No pending invitations',
+    title: 'Team members',
+    name: 'Name',
+    email: 'Email',
+    scope: 'Workspace',
+    role: 'Role',
+    roles: 'Roles',
+    lastLogin: 'Last sign-in',
+    sessions: 'Active sessions',
+    currentSession: 'This session',
+    invite: 'Invite member',
+    sendInvite: 'Send invitation',
+    revoke: 'Revoke',
+    passwordlessHint: 'Team members sign in with Telegram - no passwords to manage.',
+    confirmSuspend: 'Suspend this team member? They will lose access immediately.',
+    scopeValue: {
+      marketplace: 'Storefront',
+      office: 'Back office',
+    },
+    statusValue: {
+      active: 'Active',
+      invited: 'Invited',
+      suspended: 'Suspended',
+    },
+    invitationStatus: {
+      pending: 'Pending',
+      accepted: 'Accepted',
+      expired: 'Expired',
+      revoked: 'Revoked',
+    },
+  },
+  adminTransactions: {
+    search: 'Search transactions',
+    type: 'Type',
+    method: 'Payment method',
+    fraud: 'Fraud check',
+    flagged: 'Flagged',
+    retry: 'Retry',
+    audit: 'History',
+    emptyTitle: 'No transactions found',
+    emptyDescription: 'Try a different filter or search term.',
+    status: {
+      all: 'All statuses',
+      pending: 'Pending',
+      success: 'Successful',
+      failed: 'Failed',
+      retried: 'Retried',
+    },
+    typeValue: {
+      all: 'All types',
+      payment: 'Payment',
+      refund: 'Refund',
+      qr_payment: 'QR payment',
+    },
   },
   adminMonitoring: {
     eventsEmptyTitle: 'No events found',
     eventsEmptyDescription: 'Try a different category filter or search term.',
+    health: 'Health checks',
+    queues: 'Background queues',
+    depth: 'Waiting',
+    webhooks: 'Webhook deliveries',
+    endpoint: 'Destination',
+    event: 'Event',
+    events: 'Activity log',
+    category: 'Category',
+    level: 'Severity',
+    message: 'Description',
+    categoryValue: {
+      all: 'All categories',
+      audit: 'Admin activity',
+      security: 'Security',
+      login: 'Sign-in',
+      failed_login: 'Failed sign-in',
+      api: 'API',
+      error: 'Error',
+      warning: 'Warning',
+    },
+    queueStatus: {
+      healthy: 'Running smoothly',
+      degraded: 'Slowed down',
+      down: 'Stopped',
+    },
+    webhookStatus: {
+      delivered: 'Delivered',
+      failed: 'Failed',
+      pending: 'Pending',
+    },
+    levelValue: {
+      info: 'Info',
+      warning: 'Warning',
+      error: 'Error',
+    },
     systemState: 'System state',
     backendConnectivity: 'Backend',
     connected: 'Connected',
@@ -1608,6 +1698,7 @@ export const en: Translations = {
   adminAnalytics: {
     topProductsEmptyTitle: 'No product sales in this period',
     topProductsEmptyDescription: 'Try a wider date range.',
+    topProducts: 'Top products',
     print: 'Print',
     tabsLabel: 'Analytics sections',
     tab: {