refactor(glass): 批次1 - 迁移全局组件使用统一毛玻璃配置

迁移以下 10 个组件使用 glassConfig.ts 统一配置:
- GlassCard: GLASS_BLUR/GLASS_SHADOW 替换硬编码 blur/glow
- SubTabContainer: GLASS_BLUR.lg 替换 blur(20px)
- HomeNavbar: GLASS_BLUR.sm 替换 blur(10px)
- AuthModalManager: GLASS_BLUR.sm 替换 blur(10px)
- WechatRegister: GLASS_BLUR.xs 替换 blur(4px)
- SubscriptionModal: GLASS_BLUR.xs 替换 blur(4px)
- SubscriptionContentNew: GLASS_BLUR.sm/lg/xl 替换多处硬编码
- ImageLightbox: GLASS_BLUR.sm 替换 blur(10px)
- ImagePreviewModal: GLASS_BLUR.sm 替换 blur(10px)
- FuiContainer: GLASS_BLUR.md 替换 blur(16px)

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

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

src/components/Navbars/HomeNavbar.js

@@ -51,6 +51,7 @@ import NavbarActions from './components/NavbarActions';
 
 // 布局配置
 import { LAYOUT_PADDING, Z_INDEX } from '../../layouts/config/layoutConfig';
+import { GLASS_BLUR } from '@/constants/glassConfig';
 
 // Phase 4: MoreNavMenu 和 NavItems 组件已提取到 Navigation 目录
 
@@ -138,7 +139,7 @@ export default function HomeNavbar() {
                 right={0}
                 zIndex={Z_INDEX.NAVBAR}
                 bg={navbarBg}
-                backdropFilter="blur(10px)"
+                backdropFilter={GLASS_BLUR.sm}
                 borderBottom="1px"
                 borderColor={navbarBorder}
                 py={{ base: 2, md: 3 }}