fix(style): fix layout header style, basic arrow style and table search form style (#525)

* style: cursor pointer

* style: light mode, hover background-color

* fix(style): fix form border-radius style

src/components/Basic/src/BasicArrow.vue

@@ -52,6 +52,7 @@
 
   .@{prefix-cls} {
     display: inline-block;
+    cursor: pointer;
     transform: rotate(0deg);
     transition: all 0.3s ease 0.1s;
     transform-origin: center center;

src/components/Table/src/BasicTable.vue

@@ -312,7 +312,7 @@
         padding: 12px 10px 6px 10px;
         margin-bottom: 16px;
         background-color: @component-background;
-        border-radius: 4px;
+        border-radius: 2px;
       }
     }
 

src/layouts/default/header/components/user-dropdown/index.vue

@@ -153,6 +153,10 @@
     }
 
     &--light {
+      &:hover {
+        background-color: @header-light-bg-hover-color;
+      }
+      
       .@{prefix-cls}__name {
         color: @text-color-base;
       }