diff --git a/CHANGELOG.md b/CHANGELOG.md
index 83bda789..becb6680 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## v1.7.89-alpha (2026-06-12)
+
+- Restored the established AIUI mobile layout by hiding the Archipelago close pill and removing the newly added back button on phones.
+- Embedded AIUI once again receives `hideClose=true`, and its previous 16px mobile spacing allowance is restored without changing shared Mesh, dashboard, or app-session layouts.
+- Validation passed with `git diff --check`, `npm run type-check`, and the focused frontend route tests.
+
 ## v1.7.88-alpha (2026-06-12)
 
 - AIUI now loads immediately again instead of waiting on a production availability probe and cache-busted iframe URL, restoring the lighter launch behavior from before the regression.
diff --git a/neode-ui/src/style.css b/neode-ui/src/style.css
index 09b0dc7c..412ecf7d 100644
--- a/neode-ui/src/style.css
+++ b/neode-ui/src/style.css
@@ -556,8 +556,8 @@ input[type="radio"]:active + * {
      context) stay above the tab bar instead of sliding underneath it. */
   @media (max-width: 767px) {
     .chat-iframe-mobile {
-      height: calc(100vh - var(--mobile-tab-bar-height, 72px) - var(--safe-area-top, env(safe-area-inset-top, 0px))) !important;
-      height: calc(100dvh - var(--mobile-tab-bar-height, 72px) - var(--safe-area-top, env(safe-area-inset-top, 0px))) !important;
+      height: calc(100vh - var(--mobile-tab-bar-height, 72px) - var(--safe-area-top, env(safe-area-inset-top, 0px)) - 16px) !important;
+      height: calc(100dvh - var(--mobile-tab-bar-height, 72px) - var(--safe-area-top, env(safe-area-inset-top, 0px)) - 16px) !important;
       flex: none;
     }
   }
diff --git a/neode-ui/src/views/Chat.vue b/neode-ui/src/views/Chat.vue
index 59740467..e847d61d 100644
--- a/neode-ui/src/views/Chat.vue
+++ b/neode-ui/src/views/Chat.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="chat-fullscreen">
     <!-- Close button + connection indicator (desktop: top-right pill) -->
-    <div class="chat-mode-pill flex">
+    <div class="chat-mode-pill hidden md:flex">
       <button class="chat-close-btn" :aria-label="t('chat.closeAssistant')" @click="closeChat">
         <svg class="w-4 h-4" aria-hidden="true" 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" />
@@ -13,14 +13,7 @@
         class="w-2 h-2 rounded-full bg-green-400 ml-2 shadow-[0_0_6px_rgba(74,222,128,0.5)]"
         :title="t('chat.aiuiConnected')"
       />
-      </div>
-
-    <!-- Mobile back button -->
-    <button class="chat-mobile-back md:hidden" :aria-label="t('common.goBack')" @click="closeChat">
-      <svg class="w-5 h-5" aria-hidden="true" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7" />
-      </svg>
-    </button>
+    </div>
 
     <!-- Loading indicator while iframe loads -->
     <Transition name="fade">
@@ -79,8 +72,8 @@ let broker: ContextBroker | null = null
 
 const aiuiUrl = computed(() => {
   const envUrl = import.meta.env.VITE_AIUI_URL
-  if (envUrl) return `${envUrl}?embedded=true`
-  if (import.meta.env.PROD) return '/aiui/?embedded=true'
+  if (envUrl) return `${envUrl}?embedded=true&hideClose=true`
+  if (import.meta.env.PROD) return '/aiui/?embedded=true&hideClose=true'
   return ''
 })