chore: markup cleanup

app/components/post/detail.vue

···
     <ui-widget class="border-0 border-alttp">
       <template #header>
         <section class="p-2 mx-2">
-          <h1 class="text-3xl">
+          <h1 class="text-[32px]">
             {{ page.title }}
           </h1>
           <h2 v-if="!!page.description" class="text-sm py-2">

app/pages/[...slug].vue

···
 <template>
   <!-- <post-toc :page="page" color="neutral" class="p-2 sm:pl-4" /> -->
-  <u-container>
+  <div>
     <post-detail
       v-if="page"
       :page="page"
···
       <u-content-surround :surround="surroundings" class="border-alttp bg-black" />
     </post-detail>
     <u-skeleton v-else class="flex-1" />
-  </u-container>
+  </div>
 </template>
 
 <script setup lang="ts">