refactor: architecture compliance pass — DS tokens, hook boundary, god component split, AI hardening

- DS token migration: Anfragen.tsx + child components (AnfragenInquiryItem, AnfragenMessageBubble)
  fully migrated; DS_TEXT.brandDark added; scoreTheme.ts moved to src/lib/ with re-export proxy
- Hook boundary: Results.tsx no longer calls needService directly — routes through useNeeds()
  with optional refetchOnMount/gcTime overrides
- NewListing.tsx (440L) split into useNewListingForm hook + 8 section components under
  src/components/new-listing/; page shell reduced to 121 lines
- AI hardening: Zod .strict() on all schemas, AIProvenance extended with schemaVersion/
  fallbackReason/traceId/latencyMs, AITraceStore stats with p50/p90/p99 + failure breakdowns,
  MockAIService buildFollowUpQuestions with priority ordering + area-ambiguity detection,
  prompt templates updated (LIGHT_INDUSTRIAL, budget unit, ambiguity detection, decimal precision)
- Tests: all 154 passing; fixed test regression caused by OfferEmailResponseSchema body min(50)

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

src/components/new-listing/CreatedScreen.tsx

@@ -0,0 +1,28 @@
+import { Box, Button, Typography } from '@mui/material'
+import { CheckCircle } from 'lucide-react'
+import { DS_TEXT } from '../../lib/ds'
+
+interface Props {
+  onViewListings: () => void
+  onCreateAnother: () => void
+}
+
+export function CreatedScreen({ onViewListings, onCreateAnother }: Props) {
+  return (
+    <Box sx={{ maxWidth: 520, mx: 'auto', mt: 8, px: 3, textAlign: 'center' }}>
+      <CheckCircle size={48} color={DS_TEXT.success} style={{ marginBottom: 16 }} />
+      <Typography variant="h5" sx={{ fontWeight: 700, mb: 1 }}>Inserat erstellt</Typography>
+      <Typography color="text.secondary" sx={{ mb: 3 }}>
+        Das Inserat wurde veröffentlicht und ist für passende Suchanfragen sichtbar.
+      </Typography>
+      <Box sx={{ display: 'flex', gap: 2, justifyContent: 'center' }}>
+        <Button variant="outlined" onClick={onViewListings}>
+          Meine Inserate
+        </Button>
+        <Button variant="contained" sx={{ bgcolor: DS_TEXT.brand, '&:hover': { bgcolor: DS_TEXT.brandDark } }} onClick={onCreateAnother}>
+          Weiteres Inserat
+        </Button>
+      </Box>
+    </Box>
+  )
+}