fix(ui): add dedicated error message for API rate limit (429)

src/kimi_cli/ui/print/__init__.py

@@ -6,7 +6,7 @@
 from functools import partial
 from pathlib import Path
 
-from kosong.chat_provider import ChatProviderError
+from kosong.chat_provider import APIStatusError, ChatProviderError
 from kosong.message import Message
 from rich import print
 
@@ -100,7 +100,13 @@ def _handler():
             print(str(e))
         except ChatProviderError as e:
             logger.exception("LLM provider error:")
-            print(str(e))
+            if isinstance(e, APIStatusError) and e.status_code == 429:
+                print(
+                    "API rate limit reached. Please wait a moment before retrying,"
+                    " or reduce the number of concurrent agents."
+                )
+            else:
+                print(str(e))
         except MaxStepsReached as e:
             logger.warning("Max steps reached: {n_steps}", n_steps=e.n_steps)
             print(str(e))

src/kimi_cli/ui/shell/__init__.py

@@ -272,6 +272,11 @@ def _handler():
                 console.print("[red]Membership expired, please renew your plan[/red]")
             elif isinstance(e, APIStatusError) and e.status_code == 403:
                 console.print("[red]Quota exceeded, please upgrade your plan or retry later[/red]")
+            elif isinstance(e, APIStatusError) and e.status_code == 429:
+                console.print(
+                    "[yellow]API rate limit reached. Please wait a moment before retrying,"
+                    " or reduce the number of concurrent agents.[/yellow]"
+                )
             else:
                 console.print(f"[red]LLM provider error: {e}[/red]")
         except MaxStepsReached as e: