fix(views): close the 24-32px gap below TopNav across all views — every v-container had py-6 (or py-8 on PlaceholderView) which pushed the first content item well below where the TopNav's fade-to-transparent gradient bottoms out. Switch to pt-2 pb-6 (8px top, 24px bottom) so content sits comfortably right below the nav, matches the ArtistHeader's 'continuous with TopNav' feel. PlaceholderView uses pt-3 pb-8 keeping its larger bottom padding.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/views/ArtistView.vue

@@ -3,11 +3,11 @@
     <v-progress-circular indeterminate color="accent" size="36" />
   </div>
 
-  <v-container v-else-if="store.notFound" class="py-6">
+  <v-container v-else-if="store.notFound" class="pt-2 pb-6">
     <v-alert type="warning" variant="tonal">Artist not found.</v-alert>
   </v-container>
 
-  <v-container v-else-if="store.error && !store.overview" class="py-6">
+  <v-container v-else-if="store.error && !store.overview" class="pt-2 pb-6">
     <v-alert type="error" variant="tonal" closable>{{ store.error }}</v-alert>
   </v-container>
 
@@ -19,7 +19,7 @@
       :post-count="store.postCount"
       :last-added="store.lastAdded"
     />
-    <v-container fluid class="py-4">
+    <v-container fluid class="pt-2 pb-4">
       <v-window v-model="tab">
         <v-window-item value="posts">
           <ArtistPostsTab