更新依赖项及历史人物相关内容资源

- 更新 package.json 和 package-lock.json 中的依赖项
- 新增/更新陈云、黄炎培、鲁迅、孙中山的音频文件
- 新增场景和组件的图片资源
- 清理未使用的音频和图片文件
- 优化多个组件和页面的实现逻辑

src/components/index.ts

@@ -3,8 +3,8 @@ export { default as Video } from './video'
 export type { VideoProps, VideoRef, VideoAnchor, AnchorContext } from './video'
 
 // Button components
-export { Button, ImageButton } from './button'
-export type { BaseButtonProps, ImageButtonProps } from './button'
+export { Button, ImageButton, FlipActionButton } from './button'
+export type { BaseButtonProps, ImageButtonProps, FlipActionButtonProps } from './button'
 
 // Image component
 export { Image } from './image'
@@ -19,6 +19,8 @@ export { GuideSteps, GuideStepsItem, StudyGuideModal } from './guide'
 // Exhibit overlay
 export { ExhibitOverlay } from './exhibit'
 export type { ExhibitOverlayProps } from './exhibit'
+export { ExhibitFlipOverlay } from './exhibit'
+export type { ExhibitFlipOverlayProps } from './exhibit'
 
 // Overlay component
 export { Overlay } from './overlay'
@@ -68,6 +70,12 @@ export type {
 export { Narration } from './narration'
 export type { NarrationProps } from './narration'
 
+// Hint (lightweight toast)
+export { HintHost, showHint, hideHint } from './hint'
+export type { ShowHintOptions, HintPositionOffset } from './hint'
+export { SceneHint } from './hint'
+export type { SceneHintProps } from './hint'
+
 // Clue components
 export { ClueHintModal, ClueBookModal } from './clue'
 export type { ClueHintModalProps, ClueHint, ClueBookModalProps } from './clue'
@@ -81,12 +89,25 @@ export { Select } from './select'
 export type { SelectProps, SelectOption } from './select'
 
 // Letter components
-export { LetterToChenyun, LetterToSunzhongshan, LetterToHuangyanpei, LetterToLuxun } from './letter'
+export {
+  LetterToChenyun,
+  LetterToMaozedong,
+  LetterToSunzhongshan,
+  LetterToHuangyanpei,
+  LetterToLuxun,
+  LetterToZhangleping,
+  LetterToNieer,
+  LetterToRongdesheng,
+} from './letter'
 export type {
   LetterToChenyunProps,
+  LetterToMaozedongProps,
   LetterToSunzhongshanProps,
   LetterToHuangyanpeiProps,
   LetterToLuxunProps,
+  LetterToZhanglepingProps,
+  LetterToNieerProps,
+  LetterToRongdeshengProps,
 } from './letter'
 
 // Puzzle components