fix: resolve content clipping on mobile by moving tab padding to scroll container

Moves dynamic pt-20/pt-40 padding from perspective-container-wrapper (which
shrank the content area) to the inner scroll container via computed style.
Removes spacer divs in CloudFolder, AppDetails, MarketplaceAppDetails.
Reduces excessive bottom padding in Marketplace. Hides Cloud/Network tabs
in CloudFolder detail view. Teleports mobile back buttons to body to escape
CSS transform containing block.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neode-ui/src/views/Chat.vue

@@ -54,21 +54,6 @@
       </div>
     </div>
 
-    <!-- Mobile close bar (teleported to escape CSS transform containing block) -->
-    <Teleport to="body">
-      <div class="md:hidden mobile-back-btn flex items-center justify-center">
-        <button
-          class="w-full glass-button px-6 py-2.5 rounded-lg font-medium flex items-center justify-center gap-2 text-sm"
-          style="background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);"
-          @click="closeChat"
-        >
-          <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
-          </svg>
-          Close Chat
-        </button>
-      </div>
-    </Teleport>
   </div>
 </template>