Crash when clipboard is empty during Ctrl-V paste

Bug Description

Unhandled exception occurs when pressing Ctrl-V with an empty clipboard.

Steps to Reproduce

1. Clear clipboard (or have empty clipboard)
2. Press Ctrl-V in kimi CLI input box

Environment

• macOS
• Kimi Code CLI version: (run /version to get)
• Terminal: ghostty

Error Traceback

Exception argument of type 'NoneType' is not iterable
File "/opt/homebrew/Cellar/python@3.13/3.13.7/Frameworks/Python.framework/Versions/3.13/lib/python3.13/asyncio/events.py", line 89, in _run
self._context.run(self._callback, *self._args)
File ".../prompt_toolkit/application/application.py", line 714, in read_from_input_in_context context.copy().run(read_from_input)
File ".../prompt_toolkit/clipboard/pyperclip.py", line 41, in _ type=SelectionType.LINES if "\n" in text else SelectionType.CHARACTERS, ^^^
^^^^^^^^^

Root Cause

In prompt_toolkit/clipboard/pyperclip.py line 41, the code checks "\n" in text without first verifying that text is not None. When
clipboard is empty, text is None, causing TypeError: argument of type 'NoneType' is not iterable.

Suggested Fix

Add a null check before the in operator:

type=SelectionType.LINES if text and "\n" in text else SelectionType.CHARACTERS,

---

Start in prompt_toolkit/clipboard/pyperclip.py at the line shown in the traceback, then reproduce the crash with an empty clipboard while pressing Ctrl-V in the Kimi CLI input box. Verify that empty clipboard pastes no longer raise the reported NoneType exception, while normal clipboard content continues to work.