style(community): 详情页/发帖页顶部间距加大（pt-10），返回按钮不再紧贴 header

src/views/community/CommunityNewPostView.vue

@@ -1,6 +1,6 @@
 <template>
   <div class="gvs-community">
-    <div class="gvs-container py-6">
+    <div class="gvs-container pt-10 pb-10">
       <button
         class="gvs-btn gvs-btn-ghost !mb-4"
         @click="router.push('/Community')"

src/views/community/CommunityPostView.vue

@@ -1,6 +1,6 @@
 <template>
   <div class="gvs-community">
-    <div class="gvs-container py-6">
+    <div class="gvs-container pt-10 pb-10">
       <button
         class="gvs-btn gvs-btn-ghost !mb-4"
         @click="router.back()"