style(头部组件): 调整左右按钮的大小

src/components/GeneralHeader.vue

@@ -14,7 +14,7 @@
       "
     >
       <!-- 返回键 -->
-      <div style="width: 6%; display: flex; align-items: center">
+      <div style="width: 1.5em; display: flex; align-items: center">
         <button v-if="showBack" class="back-btn" @click="handleBack">
           <img
             v-smart-img
@@ -43,7 +43,7 @@
 
       <!-- 右侧按钮 -->
       <!-- 帮助按钮 -->
-      <button v-if="showHelp" class="help-btn" style="width: 10%" @click="$emit('help')">
+      <button v-if="showHelp" class="help-btn" style="width: 1.5em" @click="$emit('help')">
         <img
           v-smart-img
           src="../assets/icon/helpWhite.png"