feat: Implement segment update and regeneration features in Audiobook API and frontend

qwen3-tts-frontend/src/lib/api/audiobook.ts

@@ -138,6 +138,25 @@ export const audiobookApi = {
     return `/audiobook/projects/${id}/download${chapterParam}`
   },
 
+  updateSegment: async (
+    projectId: number,
+    segmentId: number,
+    data: { text: string; emo_text?: string | null; emo_alpha?: number | null }
+  ): Promise<AudiobookSegment> => {
+    const response = await apiClient.put<AudiobookSegment>(
+      `/audiobook/projects/${projectId}/segments/${segmentId}`,
+      data
+    )
+    return response.data
+  },
+
+  regenerateSegment: async (projectId: number, segmentId: number): Promise<AudiobookSegment> => {
+    const response = await apiClient.post<AudiobookSegment>(
+      `/audiobook/projects/${projectId}/segments/${segmentId}/regenerate`
+    )
+    return response.data
+  },
+
   getSegmentAudioUrl: (projectId: number, segmentId: number): string => {
     return `/audiobook/projects/${projectId}/segments/${segmentId}/audio`
   },