style: separate header back-bar and tabs in InboxHubView on main

apps/player/src/views/InboxHubView.vue

@@ -107,13 +107,12 @@ onActivated(() => {
 
 <template>
   <div class="inbox-hub" :class="{ 'inbox-hub--tabs': inboxEnabled }">
-    <header v-if="!inboxEnabled" class="page-header">
+    <header class="page-header">
       <button type="button" class="back-btn" :aria-label="t('messages.back')" @click="goBack">‹</button>
       <h1>{{ t(hubTitleKey) }}</h1>
     </header>
 
     <div v-if="inboxEnabled" class="hub-top-bar">
-      <button type="button" class="hub-back-btn" :aria-label="t('messages.back')" @click="goBack">‹</button>
       <nav class="hub-tabs" role="tablist">
         <button
           type="button"
@@ -217,26 +216,11 @@ onActivated(() => {
 }
 
 .hub-top-bar {
-  display: flex;
-  align-items: stretch;
-  gap: 6px;
   margin: 0;
   border-bottom: 1px solid var(--border);
 }
 
-.hub-back-btn {
-  flex-shrink: 0;
-  align-self: center;
-  width: 32px;
-  height: 32px;
-  border: 1px solid var(--border);
-  border-radius: 8px;
-  background: #141414;
-  color: var(--gold);
-  font-size: 20px;
-  line-height: 1;
-  cursor: pointer;
-}
+
 
 .hub-tabs {
   flex: 1;