refactor(modules/web): Mirgrat to typescript; fix bugs

modules/web/src/assets/sourceeditor.css

@@ -1,13 +1,13 @@
-@import './kbd.css';
-@import './code.css';
-
-body {
-    padding: 0;
-    margin: 0;
-}
-
-.el-tabs__header {
-    position: sticky;
-    top: 0px;
-    z-index: 2;
-}
+@import './kbd.css';
+@import './code.css';
+
+body {
+  padding: 0;
+  margin: 0;
+}
+
+.el-tabs__header {
+  position: sticky;
+  top: 0px;
+  z-index: 2;
+}