Change 'Back to history' to 'History' in AI chat widget

Co-Authored-By: Aadesh Kheria <kheriaaadesh@gmail.com>

apps/dashboard/src/components/stack-companion/ai-chat-widget.tsx

@@ -495,7 +495,7 @@ function AIChatWidgetInner({
             type="button"
           >
             <ArrowLeftIcon className="h-3 w-3" />
-            <span>Back to history</span>
+            <span>History</span>
           </button>
           <button
             onClick={onNewChat}