Style/#271-K: CSS 개선 작업

Author: se030

client/src/components/BlockSelector/style.module.scss

@@ -2,6 +2,7 @@
 
 .block-selector {
   position: absolute;
+  z-index: 99;
   height: 100%;
   overflow: hidden;
 

client/src/pages/Workspace/style.module.scss

@@ -2,4 +2,6 @@
   display: flex;
   flex-direction: row;
   width: 100vw;
+  height: 100vh;
+  overflow: hidden;
 }