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/PublicNeedDetail.tsx

@@ -174,7 +174,7 @@ export function PublicNeedDetail({ need }: PublicNeedDetailProps) {
                         variant="caption"
                         sx={{
                           fontWeight: 700,
-                          color: '#1e3a5f',
+                          color: '#152642',
                           fontSize: '0.75rem',
                           bgcolor: '#e0e7ff',
                           px: 1,
@@ -189,7 +189,7 @@ export function PublicNeedDetail({ need }: PublicNeedDetailProps) {
                       sx={{
                         height: 6,
                         borderRadius: 3,
-                        bgcolor: '#e2e8f0',
+                        bgcolor: '#e8e7e4',
                         overflow: 'hidden',
                       }}
                     >
@@ -197,7 +197,7 @@ export function PublicNeedDetail({ need }: PublicNeedDetailProps) {
                         sx={{
                           width: `${pct}%`,
                           height: '100%',
-                          bgcolor: '#1e3a5f',
+                          bgcolor: '#152642',
                           transition: 'width 0.3s',
                         }}
                       />
@@ -229,7 +229,7 @@ export function PublicNeedDetail({ need }: PublicNeedDetailProps) {
             disabled={disabled}
             sx={{
               textTransform: 'none',
-              bgcolor: '#1e3a5f',
+              bgcolor: '#152642',
               fontWeight: 600,
               '&:hover': { bgcolor: '#16304d' },
             }}