feat(mobile): expand TTS voices and align App SDK

mobile-uni/src/services/speech.ts

@@ -2,7 +2,8 @@ import type { AsrResponse, PracticeTtsContext, SpeechPlaybackStatus, SpeechSelec
 import { apiRequest, apiUrl, authHeaders, readTextPayload } from './api';
 import { getAuth } from './auth';
 import type { SpeechCapture } from './speech-capture';
-import { dataUriToBlobUrl, hasNativeAudioFileSupport, isDataAudioUri, removeNativeTempAudio, writeNativeTempAudio } from './speech-audio-source';
+import { estimateMpegAudioDuration } from './mpeg-audio-duration';
+import { dataUriToBlobUrl, decodeDataAudioUri, hasNativeAudioFileSupport, isDataAudioUri, removeNativeTempAudio, writeNativeTempAudio } from './speech-audio-source';
 import { applyTtsVoicePreference, getTtsDialectPreference, getTtsVoicePreference } from './tts-voice-preference';
 
 const audioExtensions = ['.mp3', '.wav', '.m4a', '.webm', '.aac', '.ogg'];
@@ -344,8 +345,28 @@ export const createSpeechPlaybackController = (
   return { toggle, stop, destroy, preload };
 };
 
+/**
+ * data: URI 直接数帧,不经宿主音频 API。
+ *
+ * App-Plus 的逻辑层是 JsCore,没有 `Audio`,原先在这里直接返回 null,
+ * 导致语音条只显示「语音」而没有秒数。字节解析在 H5 上同样可用且更快,
+ * 所以两端都优先走它,`Audio` 只作为远端 URL 的兜底。
+ */
+const measureFromBytes = (source: string): number | null => {
+  if (!isDataAudioUri(source)) return null;
+  const decoded = decodeDataAudioUri(source);
+  if (!decoded) return null;
+  const seconds = estimateMpegAudioDuration(decoded.bytes);
+  return seconds ? Math.max(1, Math.round(seconds)) : null;
+};
+
 export const measureAudioDuration = (source: string): Promise<number | null> =>
   new Promise((resolve) => {
+    const fromBytes = measureFromBytes(source);
+    if (fromBytes !== null) {
+      resolve(fromBytes);
+      return;
+    }
     if (typeof Audio === 'undefined') {
       resolve(null);
       return;