fix: hopefully fixed a2ui confusion by the model

src/app/generation.rs

@@ -538,16 +538,10 @@ impl App {
         let assistant_reasoning = effective.turn.reasoning_mode != ReasoningMode::Direct;
         #[cfg(target_os = "macos")]
         let model_prompt = if self.config.a2ui_enabled {
-            let mut prompt = format!(
+            format!(
                 "{prompt}\n\nA2UI client metadata:\n{}",
                 self.a2ui.client_metadata()
-            );
-            if self.a2ui.active_surface().is_none() {
-                prompt.push_str(
-                    "\n\nThere is no active A2UI surface. If this response presents UI, its first A2UI message must be createSurface with a new surfaceId and a complete root component tree. Do not update any surfaceId found only in earlier chat history.",
-                );
-            }
-            prompt
+            )
         } else {
             prompt.clone()
         };