add front end code (#27)

web/src/layouts/index.less

@@ -0,0 +1,33 @@
+.navs {
+  ul {
+    padding: 0;
+    list-style: none;
+    display: flex;
+  }
+
+  li {
+    margin-right: 1em;
+  }
+}
+
+.layout {
+  height: 100vh;
+}
+
+body {
+  margin: 0;
+}
+
+.tag {
+  height: 40px;
+  padding: 0 30px;
+  margin: 0 5px;
+  border: 1px solid #000;
+  border-radius: 10px;
+  cursor: pointer;
+}
+
+.checked {
+  color: #1677ff;
+  border-color: #1677ff;
+}