refactor: 横屏提示与缩放改为组件标签（OrientationGuard）

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/common/index.ts

@@ -31,5 +31,4 @@ export type {
 	SpotlightController,
 } from "./GuideSpotlight";
 export { defineSpotlight, GuideSpotlight } from "./GuideSpotlight";
-export { LandscapePrompt } from "./LandscapePrompt";
 export { RouteError, RouteFallback } from "./RouteFallback";