refactor(ui-native): d3roNativePalette amber->main 개명 (WS-NATIVE)

- packages/ui-native theme.ts accent: amber->main, amberDim->dim, amberGlow->glow (값 보존)
- apps/mobile 20건 + apps/mobile-rn 18건 + ui-native 컴포넌트 9건 = 47 참조 치환
SKIP: Led/PhosphorText/Header color prop 'amber'(의미론적 컴포넌트 API, 별도 마이그레이션)
       green/greenGlow 키(amber계 범위外)
정책: docs/REFACTOR_POLICY.md DP1, 이식 인사이트 P7

apps/mobile/app/(tabs)/settings.tsx

@@ -98,7 +98,7 @@ export default function SettingsScreen(): React.ReactElement {
             value={true}
             trackColor={{
               false: d3roNativePalette.bg.inset,
-              true: d3roNativePalette.accent.amber
+              true: d3roNativePalette.accent.main
             }}
             thumbColor="#ffffff"
           />
@@ -120,7 +120,7 @@ export default function SettingsScreen(): React.ReactElement {
             value={true}
             trackColor={{
               false: d3roNativePalette.bg.inset,
-              true: d3roNativePalette.accent.amber
+              true: d3roNativePalette.accent.main
             }}
             thumbColor="#ffffff"
           />
@@ -131,7 +131,7 @@ export default function SettingsScreen(): React.ReactElement {
             value={true}
             trackColor={{
               false: d3roNativePalette.bg.inset,
-              true: d3roNativePalette.accent.amber
+              true: d3roNativePalette.accent.main
             }}
             thumbColor="#ffffff"
           />