Switch default model to qwen2.5 7b

index.html

@@ -12,7 +12,7 @@
       <div class="history">
         <button class="history-item active" type="button">로컬 LLM</button>
       </div>
-      <div class="model">qwen2.5:3b</div>
+      <div class="model">qwen2.5:7b</div>
     </aside>
 
     <main class="chat-shell">