fix:1.修复生成章节内容的风格获取

backend/app/api/chapters.py

@@ -444,6 +444,7 @@ async def build_smart_chapter_context(
             .where(Chapter.content != "")
             .order_by(Chapter.chapter_number)
         )
+
         all_chapters_info = all_chapters_result.all()
         total_previous = len(all_chapters_info)
         
@@ -1054,10 +1055,10 @@ async def generate_chapter_content_stream(
                     )
                     style = style_result.scalar_one_or_none()
                     if style:
-                        # 验证风格是否可用：全局预设风格（project_id为NULL）或者当前项目的自定义风格
-                        if style.project_id is None or style.project_id == current_chapter.project_id:
+                        # 验证风格是否可用：全局预设风格（user_id为NULL）或者当前用户的自定义风格
+                        if style.user_id is None or style.user_id == current_user_id:
                             style_content = style.prompt_content or ""
-                            style_type = "全局预设" if style.project_id is None else "项目自定义"
+                            style_type = "全局预设" if style.user_id is None else "用户自定义"
                             logger.info(f"使用指定风格: {style.name} ({style_type})")
                         else:
                             logger.warning(f"风格 {style_id} 不属于当前项目，无法使用")
@@ -2338,7 +2339,7 @@ async def generate_single_chapter_for_batch(
         )
         style = style_result.scalar_one_or_none()
         if style:
-            if style.project_id is None or style.project_id == chapter.project_id:
+            if style.user_id is None or style.user_id == user_id:
                 style_content = style.prompt_content or ""
     
     # 构建智能上下文
@@ -2589,10 +2590,10 @@ async def regenerate_chapter_stream(
                 )
                 style = style_result.scalar_one_or_none()
                 if style:
-                    # 验证风格是否可用：全局预设风格（project_id为NULL）或者当前项目的自定义风格
-                    if style.project_id is None or style.project_id == chapter.project_id:
+                    # 验证风格是否可用：全局预设风格（user_id为NULL）或者当前用户的自定义风格
+                    if style.user_id is None or style.user_id == user_id:
                         style_content = style.prompt_content or ""
-                        style_type = "全局预设" if style.project_id is None else "项目自定义"
+                        style_type = "全局预设" if style.user_id is None else "用户自定义"
                         logger.info(f"✅ 使用写作风格: {style.name} ({style_type})")
                     else:
                         logger.warning(f"⚠️ 风格 {style_id} 不属于当前项目，跳过")

backend/app/api/wizard_stream.py

@@ -229,7 +229,7 @@ async def world_building_generator(
         try:
             result = await db.execute(
                 select(WritingStyle).where(
-                    WritingStyle.project_id.is_(None),
+                    WritingStyle.user_id.is_(None),
                     WritingStyle.order_index == 1
                 ).limit(1)
             )

backend/app/database.py

@@ -311,7 +311,7 @@ async def _init_global_writing_styles(user_id: str):
         async with AsyncSessionLocal() as session:
             # 检查是否已存在全局预设风格
             result = await session.execute(
-                select(WritingStyle).where(WritingStyle.project_id.is_(None))
+                select(WritingStyle).where(WritingStyle.user_id.is_(None))
             )
             existing = result.scalars().first()
             
@@ -326,7 +326,7 @@ async def _init_global_writing_styles(user_id: str):
             
             for index, (preset_id, preset_data) in enumerate(presets.items(), start=1):
                 style = WritingStyle(
-                    project_id=None,  # NULL 表示全局预设
+                    user_id=None,  # NULL 表示全局预设
                     name=preset_data["name"],
                     style_type="preset",
                     preset_id=preset_id,

backend/app/services/import_export_service.py

@@ -340,10 +340,19 @@ class ImportExportService:
     
     @staticmethod
     async def _export_writing_styles(project_id: str, db: AsyncSession) -> List[WritingStyleExportData]:
-        """导出写作风格"""
+        """导出写作风格（用户自定义风格）"""
+        # 获取项目所属用户
+        project_result = await db.execute(
+            select(Project).where(Project.id == project_id)
+        )
+        project = project_result.scalar_one_or_none()
+        if not project:
+            return []
+        
+        # 导出该用户的自定义风格（不包括全局预设）
         result = await db.execute(
             select(WritingStyle)
-            .where(WritingStyle.project_id == project_id)
+            .where(WritingStyle.user_id == project.user_id)
             .order_by(WritingStyle.order_index)
         )
         styles = result.scalars().all()
@@ -797,11 +806,30 @@ class ImportExportService:
         styles_data: List[Dict],
         db: AsyncSession
     ) -> int:
-        """导入写作风格"""
+        """导入写作风格（用户自定义风格）"""
+        # 获取项目所属用户
+        project_result = await db.execute(
+            select(Project).where(Project.id == project_id)
+        )
+        project = project_result.scalar_one_or_none()
+        if not project:
+            return 0
+        
         count = 0
         for style_data in styles_data:
+            # 检查是否已存在同名风格（避免重复导入）
+            existing = await db.execute(
+                select(WritingStyle).where(
+                    WritingStyle.user_id == project.user_id,
+                    WritingStyle.name == style_data.get("name")
+                )
+            )
+            if existing.scalar_one_or_none():
+                logger.debug(f"风格 {style_data.get('name')} 已存在，跳过导入")
+                continue
+            
             style = WritingStyle(
-                project_id=project_id,
+                user_id=project.user_id,  # 使用 user_id 而不是 project_id
                 name=style_data.get("name"),
                 style_type=style_data.get("style_type"),
                 preset_id=style_data.get("preset_id"),