fix: adjust new post icon position and close message window

frontend_nuxt/app.vue

@@ -138,7 +138,7 @@ const goToNewPost = () => {
   height: 60px;
   border-radius: 50%;
   position: fixed;
-  bottom: 40px;
+  bottom: 70px;
   right: 20px;
   font-size: 20px;
   cursor: pointer;

frontend_nuxt/components/MessageFloatWindow.vue

@@ -16,6 +16,7 @@
         @click="reboundToDefault"
       ></i>
       <i class="fas fa-expand" title="在页面中打开" @click="expand"></i>
+      <i class="fas fa-times" title="关闭" @click="close"></i>
     </div>
   </div>
 </template>
@@ -48,6 +49,10 @@ function expand() {
   navigateTo(target)
 }
 
+function close() {
+  floatRoute.value = null
+}
+
 function injectBaseTag() {
   if (!iframeRef.value) return