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/PipelineCard.tsx

@@ -6,7 +6,7 @@ import { ExternalLink, MapPin, MessageSquare } from 'lucide-react'
 import { MatchScoreDisplay } from '../match-card/MatchScoreDisplay'
 import { HeatBadge } from '../shared'
 import type { PipelineItem } from '../../domain/pipeline'
-import { STAGES, RESULT_TYPE_LABEL, RESULT_TYPE_COLOR } from './pipelineConstants'
+import { STAGES, RESULT_TYPE_META } from './pipelineConstants'
 import { detailPath } from './pipelineUtils'
 
 // ── DraggableCard ─────────────────────────────────────────────────────────────
@@ -68,8 +68,8 @@ export function DraggableCard({
           <HeatBadge propertyId={item.propertyId} size="sm" />
           <Chip
             size="small"
-            label={RESULT_TYPE_LABEL[item.resultType] ?? item.resultType}
-            sx={{ bgcolor: RESULT_TYPE_COLOR[item.resultType] ?? '#475569', color: 'white', fontSize: 10, height: 20, fontWeight: 600 }}
+            label={RESULT_TYPE_META[item.resultType]?.label ?? item.resultType}
+            sx={{ bgcolor: RESULT_TYPE_META[item.resultType]?.color ?? '#475569', color: 'white', fontSize: 10, height: 20, fontWeight: 600 }}
           />
           <Chip
             size="small"