refactor: consolidate duplicated UI score/color/badge logic into lib/

- Add matchScoreHex(), criterionScoreColor(), criterionScoreTextColor() to lib/utils.ts
- Add RESULT_TYPE_META (labels + colors) to lib/ds.ts as single source of truth
- Remove 5 local scoreColor() functions: StrongMatchMiniCard, MatchListCard,
  pipelineUtils (re-exported as matchScoreHex), CriterionRow, ScoreBreakdownPanel,
  ScoreInlineBreakdown
- Remove local RESULT_TYPE_META/TYPE_META from MatchCardHeader, ResultTypeBadge;
  remove RESULT_TYPE_LABEL/COLOR from pipelineConstants — all now use lib/ds.ts
- Replace local confidenceColor() in MatchCardHeader, ConfidenceFieldBadge,
  ReliabilityScorePanel with confidenceHex() from lib/utils.ts
- Replace local qualityColor() in propertyHelpers, DataQualityWidget with
  dataQualityColor() from lib/utils.ts
- Fix FUTURE_AVAILABILITY label inconsistency ('Future'/'Zukunft' → 'Zukunftssignal')
- Fix EXTERNAL_MARKET label inconsistency ('Direktinserat' → 'Plattform')
- tsc --noEmit passes with zero errors

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

src/components/match-center/MatchListCard.tsx

@@ -3,6 +3,7 @@ import { MatchStatusBadge } from './MatchStatusBadge'
 import type { Match } from '../../domain/match'
 import type { Property } from '../../domain/property'
 import type { Need } from '../../domain/need'
+import { matchScoreHex } from '../../lib/utils'
 
 const STRENGTH_META: Record<string, { label: string; bg: string; color: string }> = {
   STRONG:   { label: 'Stark',    bg: '#f0fdf4', color: '#1a7a4a' },
@@ -10,12 +11,6 @@ const STRENGTH_META: Record<string, { label: string; bg: string; color: string }
   WEAK:     { label: 'Schwach',  bg: '#fff1f2', color: '#c0392b' },
 }
 
-function scoreColor(score: number) {
-  if (score >= 80) return '#1a7a4a'
-  if (score >= 60) return '#d97706'
-  return '#c0392b'
-}
-
 interface Props {
   match: Match
   property: Property | undefined
@@ -49,7 +44,7 @@ export function MatchListCard({ match, property, need, onSelect, onApprove }: Pr
           width: 52,
           height: 52,
           borderRadius: 2,
-          bgcolor: scoreColor(match.matchScore),
+          bgcolor: matchScoreHex(match.matchScore),
           display: 'flex',
           alignItems: 'center',
           justifyContent: 'center',