修复：CI 部署环境与 ref 错配、迁移碎片化、图片意图 source_span、章节物化脏版式、会话历史与本地语音不一致

新增：TTS 上传 COS 与分片、章节 reading_segments 物化与快照、markdown 清洗、会话消息 repository、语音 store 重构与相关测试

app-expo/src/core/ws/client.ts

@@ -46,6 +46,9 @@ function mapServerMessage(raw: RawServerMessage): WsEvent | null {
         kind: 'tts_audio_received',
         conversationId: cid,
         audioBase64: d.audio_base64 as string,
+        audioUrl: d.audio_url as string | undefined,
+        index: d.index as number | undefined,
+        total: d.total as number | undefined,
       };
 
     case 'end_conversation':

app-expo/src/core/ws/types.ts

@@ -60,6 +60,9 @@ export interface TtsAudioReceivedEvent {
   kind: 'tts_audio_received';
   conversationId: string;
   audioBase64: string;
+  audioUrl?: string;
+  index?: number;
+  total?: number;
 }
 
 export interface ConversationEndedEvent {