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-card/SignalQualityDots.tsx

@@ -10,7 +10,7 @@ export function SignalQualityDots({ quality }: { quality: 'HIGH' | 'MEDIUM' | 'L
   return (
     <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.5 }}>
       {c.dots.map((filled, i) => (
-        <Box key={i} sx={{ width: 7, height: 7, borderRadius: '50%', bgcolor: filled ? c.color : '#e2e8f0' }} />
+        <Box key={i} sx={{ width: 7, height: 7, borderRadius: '50%', bgcolor: filled ? c.color : '#e8e7e4' }} />
       ))}
       <Typography sx={{ fontSize: '0.68rem', color: c.color, fontWeight: 600, ml: 0.25 }}>
         {c.label}