refactor(customer-service): 优化客服模块交互，点击直接弹出聊天框

- 修改 header.vue 和 play.vue 客服按钮点击事件，跳过中间选择弹窗
- 重写 CustomerServiceWindow.vue 样式，匹配 PC 端深色主题风格
- 移除图片发送功能，仅保留文本消息
- 新增遮罩层、头像区分、金色渐变按钮等 UI 元素

src/components/header/header.vue

@@ -8,7 +8,7 @@
         </div>
         <div class="setup">
             <el-tooltip v-if="webconfig.isServerCode||false" class="item" effect="dark" :content="Language.tip_service" placement="bottom">
-                <span  @click="isShowPop('updateService')" class="btn service" ></span>
+                <span  @click="openCustomerService()" class="btn service" ></span>
             </el-tooltip>
             <el-tooltip class="item" effect="dark" :content="Language.tip_cn_tw" placement="bottom">
                 <span  @click="isShowPop('updatelang')" class="btn fontj" ></span>
@@ -69,7 +69,10 @@ export default {
       }else{
         this.$store.dispatch('updatemainPop',{type:type,ishow:true});
       }
-      
+
+    },
+    openCustomerService(){
+      this.$root.$emit('openCustomerService');
     },
     offPop(){
       this.$store.dispatch('updatemainPop',{type:'',ishow:false});