接入原生壳音频文件导入能力

新增 file.importAudio HostBridge 契约和 H5 facade

移动端通过 Expo DocumentPicker 读取受控音频文件

桌面端通过 Tauri 文件选择框读取受控音频文件

通用音频输入面板在原生壳复用宿主导入和现有音频处理管线

更新壳能力检查、测试、方案文档和共享决策记录

packages/shared/src/contracts/hostBridge.test.ts

@@ -60,6 +60,7 @@ describe('HostBridge shared contract helpers', () => {
     expect(isHostBridgeCapability('clipboard.readText')).toBe(true);
     expect(isHostBridgeCapability('file.importText')).toBe(true);
     expect(isHostBridgeCapability('file.importImage')).toBe(true);
+    expect(isHostBridgeCapability('file.importAudio')).toBe(true);
     expect(isHostBridgeCapability('file.imageDropped')).toBe(true);
     expect(isHostBridgeCapability('app.setBadgeCount')).toBe(true);
     expect(isHostBridgeCapability('notification.showLocal')).toBe(true);

packages/shared/src/contracts/hostBridge.ts

@@ -32,6 +32,7 @@ export const HOST_BRIDGE_METHODS = [
   'file.importText',
   'file.exportImage',
   'file.importImage',
+  'file.importAudio',
   'haptics.impact',
   'notification.showLocal',
 ] as const;
@@ -336,6 +337,21 @@ export type FileImportImageResult = {
   };
 };
 
+export type HostBridgeAudioMimeType =
+  | 'audio/mpeg'
+  | 'audio/mp4'
+  | 'audio/wav'
+  | 'audio/ogg'
+  | 'audio/webm';
+
+export type FileImportAudioResult = {
+  action: 'selected';
+  fileName: string;
+  base64Data: string;
+  mimeType: HostBridgeAudioMimeType;
+  bytes: number;
+};
+
 export type HapticsImpactPayload = {
   style?: 'light' | 'medium' | 'heavy';
 };