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>

src/components/layout/AppShell.tsx

@@ -101,28 +101,12 @@ const WORKSPACE_CONFIG: Record<WorkspaceType, WorkspaceConfig> = {
       { path: '/demand/pipeline', label: 'Deal Pipeline', icon: Kanban },
     ],
   },
-  [WorkspaceType.OPERATIONS]: {
-    label: 'Administration',
-    abbreviation: 'ADM',
-    icon: Shield,
-    firstPath: '/ops/review-queue',
-    chipColor: '#7c3aed',
-    navItems: [
-      { path: '/ops/review-queue', label: 'Review Queue', icon: ClipboardList },
-      { path: '/ops/ai-monitoring', label: 'AI Monitoring', icon: Activity },
-      { path: '/ops/governance', label: 'Governance', icon: Shield },
-      { path: '/ops/source-monitoring', label: 'Source Monitoring', icon: ServerCog },
-      { path: '/ops/signal-pipeline', label: 'Signal Pipeline', icon: GitBranch },
-      { path: '/ops/activity-timeline', label: 'Aktivitäts-Timeline', icon: Clock },
-    ],
-  },
 }
 
 // Ordered list for rendering workspace tabs
 const WORKSPACE_ORDER: WorkspaceType[] = [
   WorkspaceType.SUPPLY,
   WorkspaceType.DEMAND,
-  WorkspaceType.OPERATIONS,
 ]
 
 // ---------------------------------------------------------------------------
@@ -132,7 +116,6 @@ const WORKSPACE_ORDER: WorkspaceType[] = [
 function getWorkspaceFromPath(pathname: string): WorkspaceType | null {
   if (pathname.startsWith('/supply')) return WorkspaceType.SUPPLY
   if (pathname.startsWith('/demand')) return WorkspaceType.DEMAND
-  if (pathname.startsWith('/ops')) return WorkspaceType.OPERATIONS
   return null
 }