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/TechnicalDetailsSection.tsx

@@ -0,0 +1,51 @@
+import { Box, Card, MenuItem, TextField, Typography } from '@mui/material'
+import { FIT_OUT_OPTIONS } from '../../pages/supply/newListingConstants'
+
+interface Props {
+  floor: string
+  onFloorChange: (v: string) => void
+  fitOut: string
+  onFitOutChange: (v: string) => void
+  parking: string
+  onParkingChange: (v: string) => void
+  ceilingHeight: string
+  onCeilingHeightChange: (v: string) => void
+}
+
+export function TechnicalDetailsSection({
+  floor, onFloorChange,
+  fitOut, onFitOutChange,
+  parking, onParkingChange,
+  ceilingHeight, onCeilingHeightChange,
+}: Props) {
+  return (
+    <Card sx={{ p: 3, mb: 3 }}>
+      <Typography variant="subtitle2" sx={{ fontWeight: 700, mb: 2 }}>Technische Details (optional)</Typography>
+      <Box sx={{ display: 'grid', gridTemplateColumns: '1fr 1fr 1fr 1fr', gap: 2 }}>
+        <TextField
+          label="Stockwerk" value={floor}
+          onChange={e => onFloorChange(e.target.value)}
+          size="small" type="number" fullWidth placeholder="0 = EG"
+        />
+        <TextField
+          select label="Ausbaustandard" value={fitOut}
+          onChange={e => onFitOutChange(e.target.value)} size="small" fullWidth
+        >
+          {FIT_OUT_OPTIONS.map(o => (
+            <MenuItem key={o.value} value={o.value}>{o.label}</MenuItem>
+          ))}
+        </TextField>
+        <TextField
+          label="Parkplätze" value={parking}
+          onChange={e => onParkingChange(e.target.value)}
+          size="small" type="number" inputProps={{ min: 0 }} fullWidth
+        />
+        <TextField
+          label="Deckenhöhe (m)" value={ceilingHeight}
+          onChange={e => onCeilingHeightChange(e.target.value)}
+          size="small" type="number" inputProps={{ step: 0.1, min: 2 }} fullWidth
+        />
+      </Box>
+    </Card>
+  )
+}