feat: add title field to synopsis generation requests and update synopsis generation logic

qwen3-tts-frontend/src/pages/Audiobook.tsx

@@ -547,10 +547,12 @@ function AIScriptDialog({ open, onClose, onCreated }: { open: boolean; onClose:
   }
 
   const handleGenerateSynopsis = async () => {
+    if (!title) { toast.error('请输入作品标题'); return }
     if (!genre) { toast.error('请选择故事类型'); return }
     setGeneratingSynopsis(true)
     try {
       const result = await audiobookApi.generateSynopsis({
+        title,
         genre: subgenre ? `${genre} - ${subgenre}` : genre,
         subgenre,
         protagonist_type: protagonistType,
@@ -780,10 +782,12 @@ function NSFWScriptDialog({ open, onClose, onCreated }: { open: boolean; onClose
   }
 
   const handleGenerateSynopsis = async () => {
+    if (!title) { toast.error('请输入作品标题'); return }
     if (!genre) { toast.error('请选择故事类型'); return }
     setGeneratingSynopsis(true)
     try {
       const result = await audiobookApi.generateNsfwSynopsis({
+        title,
         genre: subgenre ? `${genre} - ${subgenre}` : genre,
         subgenre,
         protagonist_type: protagonistType,