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/demand/NeedBuilderErrorState.tsx

@@ -0,0 +1,31 @@
+import { Box, Button, Typography } from '@mui/material'
+import { AlertTriangle, RotateCcw } from 'lucide-react'
+
+interface Props {
+  message: string
+  onRetry: () => void
+}
+
+export function NeedBuilderErrorState({ message, onRetry }: Props) {
+  return (
+    <Box sx={{ display: 'flex', flexDirection: 'column', alignItems: 'center', py: 12, gap: 3, maxWidth: 480, mx: 'auto' }}>
+      <AlertTriangle size={48} color="#c0392b" />
+      <Box sx={{ textAlign: 'center' }}>
+        <Typography variant="h6" sx={{ fontWeight: 600, mb: 1 }}>
+          Analyse fehlgeschlagen
+        </Typography>
+        <Typography variant="body2" color="text.secondary">
+          {message}
+        </Typography>
+      </Box>
+      <Button
+        variant="contained"
+        startIcon={<RotateCcw size={16} />}
+        onClick={onRetry}
+        sx={{ bgcolor: '#1e3a5f', '&:hover': { bgcolor: '#162d4a' } }}
+      >
+        Erneut versuchen
+      </Button>
+    </Box>
+  )
+}