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/anfragencenter/MockPdfPreview.tsx

@@ -164,11 +164,11 @@ export function MockPdfPreview({ fields, fallbackFields, fieldSelections }: Mock
       {hasPropertyPage && (
         <>
           <Box sx={{ my: 3, display: 'flex', alignItems: 'center', gap: 1.5 }}>
-            <Divider sx={{ flex: 1, borderColor: '#1e3a5f', borderWidth: 1 }} />
+            <Divider sx={{ flex: 1, borderColor: '#152642', borderWidth: 1 }} />
             <Typography variant="caption" sx={{ color: '#94a3b8', fontSize: '0.68rem', whiteSpace: 'nowrap', letterSpacing: 0.5, textTransform: 'uppercase' }}>
               Seite 2 — Objektdetails
             </Typography>
-            <Divider sx={{ flex: 1, borderColor: '#1e3a5f', borderWidth: 1 }} />
+            <Divider sx={{ flex: 1, borderColor: '#152642', borderWidth: 1 }} />
           </Box>
 
           <Box