chore: add GitHub repo button

components/GitHubButton.vue

@@ -0,0 +1,11 @@
+<template>
+  <UButton
+    color="primary"
+    variant="subtle"
+    icon="i-lucide-github"
+    to="https://github.com/AnotiaWang/deep-research-web-ui"
+    target="_blank"
+  >
+    GitHub
+  </UButton>
+</template>

pages/index.vue

@@ -2,13 +2,16 @@
   <div>
     <UContainer>
       <div class="max-w-4xl mx-auto py-8 flex flex-col gap-y-4">
-        <div class="flex items-center gap-2">
+        <div class="flex flex-col sm:flex-row gap-2">
           <h1 class="text-3xl font-bold text-center mb-2">
             Deep Research Assistant
           </h1>
-          <ConfigManager ref="configManagerRef" class="ml-auto" />
+          <div class="mx-auto sm:ml-auto sm:mr-0 flex items-center gap-2">
+            <GitHubButton />
+            <ConfigManager ref="configManagerRef" />
             <ColorModeButton />
           </div>
+        </div>
 
         <div>
           This is a web UI for