refactor(Center): 迁移毛玻璃效果到统一配置

- FUIEventCard.tsx: 使用 GLASS_BLUR.sm 替代 blur(8px)
- EventFormModal.tsx: 使用 GLASS_BLUR.xs 替代 blur(4px)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/views/Center/components/EventFormModal.tsx

@@ -49,6 +49,7 @@ import { logger } from '@/utils/logger';
 import { getApiBase } from '@/utils/apiConfig';
 import { loadWatchlist, loadAllStocks } from '@/store/slices/stockSlice';
 import { stockService } from '@/services/stockService';
+import { GLASS_BLUR } from '@/constants/glassConfig';
 
 dayjs.locale('zh-cn');
 
@@ -559,7 +560,7 @@ export const EventFormModal: React.FC<EventFormModalProps> = ({
   const modalStyles = {
     mask: {
       background: 'rgba(0, 0, 0, 0.7)',
-      backdropFilter: 'blur(4px)',
+      backdropFilter: GLASS_BLUR.xs,
     },
     content: {
       background: 'linear-gradient(135deg, #1A1A2E 0%, #0F0F1A 100%)',

src/views/Center/components/FUIEventCard.tsx

@@ -35,6 +35,7 @@ import dayjs from 'dayjs';
 import 'dayjs/locale/zh-cn';
 
 import type { InvestmentEvent } from '@/types';
+import { GLASS_BLUR } from '@/constants/glassConfig';
 
 dayjs.locale('zh-cn');
 
@@ -126,7 +127,7 @@ export const FUIEventCard = memo<FUIEventCardProps>(({
       p={4}
       border="1px solid"
       borderColor={FUI_THEME.border}
-      backdropFilter="blur(8px)"
+      backdropFilter={GLASS_BLUR.sm}
       transition="all 0.3s ease"
       _hover={{
         borderColor: FUI_THEME.borderHover,