improve prompt workflow view text legibility and add Gemini note

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/quickstart/PromptWorkflowView.tsx

@@ -91,10 +91,13 @@ export function PromptWorkflowView({
               border-neutral-700 hover:border-neutral-600
             `}
           />
-          <p className="text-[10px] text-neutral-500">
+          <p className="text-xs text-neutral-400">
             Describe what you want your workflow to accomplish. Be specific
             about inputs, outputs, and any transformations.
           </p>
+          <p className="text-xs text-neutral-400">
+            Note: This feature currently only works with Gemini models.
+          </p>
         </div>
 
         {/* Error */}