feat: redesign Schattenmarkt card & detail view for explainability

- Remove abstract Konfidenz/DQ badges from match detail header
- Replace ScoreBreakdownPanel with 3-step Bewertungsherleitung for
  FUTURE_AVAILABILITY: Kriterien-Match per factor with bars, Signal-
  Abschlag (verified ERP = kein Abschlag / probabilistic = -N Punkte),
  Gesamt-Score
- Restructure FutureAvailabilityContextPanel: source section first,
  verified ERP box for LEASE_CONTRACT, remove Konfidenz row, disclaimer
  as grey footnote instead of yellow alert
- Add LEASE_EXPIRY to signal type/relevance bridge labels
- Show up to 3 match reasons with explanation on cards (was 1)
- matchCardAdapter: return top-3 positive factors as reasons

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

src/pages/demand/MatchDetail.tsx

@@ -45,12 +45,6 @@ function buildReasons(match: NonNullable<ReturnType<typeof useMatchDetail>['data
   }))
 }
 
-function confColor(c: number) {
-  return c >= 0.75 ? '#1a7a4a' : c >= 0.55 ? '#d97706' : '#c0392b'
-}
-function dqColor(q: number) {
-  return q >= 0.80 ? '#1a7a4a' : q >= 0.60 ? '#d97706' : '#c0392b'
-}
 
 export default function MatchDetail() {
   const { matchId } = useParams<{ matchId: string }>()
@@ -108,10 +102,6 @@ export default function MatchDetail() {
   const location = city
     ? `${city}${property?.location?.district ? `, ${property.location.district}` : ''}`
     : signal?.locationHint ?? '–'
-  const dqScore = property?.dataQuality?.score ?? signal?.confidenceScore ?? 0.5
-  const confPct = Math.round(match.confidenceLevel * 100)
-  const dqPct = Math.round(dqScore * 100)
-
   // Tax calculator — only shown when AI evaluated taxEnvironment
   const allFactors = [...match.positiveFactors, ...(match.negativeFactors ?? [])]
   const hasTaxFactor = allFactors.some(f => f.criterion === 'taxEnvironment')
@@ -223,16 +213,6 @@ export default function MatchDetail() {
                 {property?.assetType && (
                   <Chip label={property.assetType} size="small" variant="outlined" sx={{ fontSize: '0.72rem' }} />
                 )}
-                <Chip
-                  label={`${confPct}% Konfidenz`}
-                  size="small"
-                  sx={{ bgcolor: confColor(match.confidenceLevel), color: 'white', fontSize: '0.72rem' }}
-                />
-                <Chip
-                  label={`DQ ${dqPct}%`}
-                  size="small"
-                  sx={{ bgcolor: dqColor(dqScore), color: 'white', fontSize: '0.72rem' }}
-                />
               </Box>
             </Box>
 
@@ -343,7 +323,7 @@ export default function MatchDetail() {
 
         {/* Sidebar */}
         <Box sx={{ width: { xs: '100%', lg: 320 }, flexShrink: 0, position: { xs: 'static', lg: 'sticky' }, top: 64, display: 'flex', flexDirection: 'column', gap: 2 }}>
-          <ScoreBreakdownPanel match={match} taxCalculatorUrl={taxCalculatorUrl} />
+          <ScoreBreakdownPanel match={match} taxCalculatorUrl={taxCalculatorUrl} isFuture={isFuture} signal={signal} />
           <NextActionsPanel
             match={match}
             onCompare={handleCompare}