feat: premium redesign — DM Serif, refined palette, flat score badges

- Design tokens (ds.ts, theme.ts, scoreTheme.ts): new warm palette
  (#152642 navy, #f9f8f6 warm white, #e8e7e4 borders, #b8975a gold accent),
  flat score tier badges replacing CSS gradients, Inter + DM Serif Display typography
- Card components: white-background cards, DM Serif score numbers, max-2 badge
  chips with +N overflow tooltip, editorial score badge positioning
- Layout shell: gold left-accent nav active state, 64px top bar, outlined
  workspace chip, DM Serif page titles
- Shared atoms: GenericBadge (outlined/solid variants), ResultFilterBar
  (simplified chip styles), DecisionContextPanel (dot metrics, no left accent)
- Global replacement (118 files): #1e3a5f→#152642, #e2e8f0→#e8e7e4,
  #f4f6f9→#f9f8f6 — all handled via Node.js for proper UTF-8 safety

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

src/components/match-detail/MatchDetailHero.tsx

@@ -46,7 +46,7 @@ export function MatchDetailHero({
       {/* Hero: image first, map fallback */}
       {!isFuture && (
         property?.images?.[0] ? (
-          <Box sx={{ width: '100%', height: 400, overflow: 'hidden', bgcolor: '#e2e8f0', flexShrink: 0 }}>
+          <Box sx={{ width: '100%', height: 400, overflow: 'hidden', bgcolor: '#e8e7e4', flexShrink: 0 }}>
             <img
               src={property.images[0]}
               alt={property.title}
@@ -105,7 +105,7 @@ export function MatchDetailHero({
                   size="small"
                   startIcon={<Columns2 size={14} />}
                   onClick={onCompare}
-                  sx={{ bgcolor: '#1e3a5f', '&:hover': { bgcolor: '#162d4a' }, textTransform: 'none' }}
+                  sx={{ bgcolor: '#152642', '&:hover': { bgcolor: '#162d4a' }, textTransform: 'none' }}
                 >
                   Vergleichen
                 </Button>