sketch暂时修改为java端推荐，根据style进行推荐

src/main/resources/mapper/primary/WorkspaceMapper.xml

@@ -27,5 +27,10 @@
     <select id="selectWorkspacePage" resultMap="BaseResultMap">
         select * from workspace where is_deleted = 0
     </select>
+    <select id="getStyleByProjectId" resultType="java.lang.String">
+        select name from style where id =
+        (select style_id from workspace_rel_style where workspace_id =
+        (select id from workspace where project_id = #{projectId}))
+    </select>
 
 </mapper>