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/pipeline/pipelineUtils.ts

@@ -1,8 +1,5 @@
 import type { PipelineItem } from '../../domain/pipeline'
-
-export function scoreColor(score: number) {
-  return score >= 80 ? '#1a7a4a' : score >= 65 ? '#d97706' : '#c0392b'
-}
+export { matchScoreHex as scoreColor } from '../../lib/utils'
 
 export function detailPath(item: PipelineItem): string | null {
   // propertyId is always stable across sessions — prefer it