Add KYC translations, AI button, improve chat, swap homepage sections

- Add missing kycOverview.list translations (en + ru)
- Add AI assistant button to navigation (left of globe)
- Improve AI chat layout: fixed textarea at bottom, full width
- Swap homepage sections: How it works before Who it's for

app/components/navigation/MainNavigation.vue

@@ -21,8 +21,13 @@
         </NuxtLink>
       </nav>
 
-      <!-- Right: Globe + Team + User -->
+      <!-- Right: AI + Globe + Team + User -->
       <div class="flex items-center gap-2 ml-auto">
+        <!-- AI Assistant button -->
+        <NuxtLink :to="localePath('/clientarea/ai')" class="btn btn-ghost btn-circle">
+          <Icon name="lucide:bot" size="20" />
+        </NuxtLink>
+
         <!-- Globe (language/currency) dropdown -->
         <div class="dropdown dropdown-end">
           <button tabindex="0" class="btn btn-ghost btn-circle">