feat: remove Administration workspace — keep only Verwaltung + Suche

- Delete all ops page components (ReviewQueue, AIMonitoring, Governance,
  SourceMonitoring, ActivityTimeline, SignalPipeline)
- Remove OPERATIONS workspace from AppShell config, nav order, path detection
- Remove all /ops/* routes from App.tsx
- Remove WorkspaceType.OPERATIONS from allowedWorkspaces in authService,
  sessionStore, permissions
- Keep MarketIntelligence page (already moved to /supply/market-intelligence)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/worktrees/agent-a82a3716/src/components/ai-monitoring/index.ts

@@ -0,0 +1,8 @@
+export { AIOutputStatusBadge } from './AIOutputStatusBadge'
+export { PromptVersionBadge } from './PromptVersionBadge'
+export { AIErrorBadge } from './AIErrorBadge'
+export { AIMonitoringEmptyState } from './AIMonitoringEmptyState'
+export { AIMonitoringMetrics } from './AIMonitoringMetrics'
+export { AIOutputTable } from './AIOutputTable'
+export { AIReviewActionToolbar } from './AIReviewActionToolbar'
+export { AIOutputDetailPanel } from './AIOutputDetailPanel'