feat(script-favorite): add ScriptFavoriteMapper

- Extends BaseMapper<ScriptFavorite>
- Standard MyBatis-Plus mapper pattern matching project convention

server/src/main/java/com/emotion/mapper/ScriptFavoriteMapper.java

@@ -0,0 +1,15 @@
+package com.emotion.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.emotion.entity.ScriptFavorite;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 剧本收藏Mapper接口
+ *
+ * @author huazhongmin
+ * @date 2026-07-19
+ */
+@Mapper
+public interface ScriptFavoriteMapper extends BaseMapper<ScriptFavorite> {
+}