feat: add /yolo meta command

[stdrc]

Related Issue

Resolve #(issue_number)

Description

[Copilot]

Pull Request Overview

This PR adds a /yolo meta command to enable YOLO (auto-approve all actions) mode after the CLI has started, complementing the existing --yolo command-line flag that sets this mode on startup.

• Implements the /yolo meta command as a kimi_soul_only command
• Updates the CHANGELOG to document the new feature

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/kimi_cli/ui/shell/metacmd.py	Adds the new yolo() async function that enables YOLO mode by calling set_yolo(True) on the approval system
CHANGELOG.md	Documents the addition of the /yolo meta command in the Unreleased section

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[Copilot]

[nitpick] Consider adding logging for consistency with other meta commands like /init and /compact. For example:

logger.info("Running `/yolo`")

Suggested change

	logger.info("Running `/yolo`")

[Copilot]

[nitpick] The /yolo command only allows enabling YOLO mode but doesn't provide a way to disable it. Consider either:

1. Making this command toggle YOLO mode on/off
2. Adding a separate /no-yolo command to disable it
3. Accepting an optional argument to control the state (e.g., /yolo on or /yolo off)

This would improve usability by allowing users to revert the setting without restarting the session.

Suggested change

	"""Enable YOLO mode (auto approve all actions)"""
	assert isinstance(app.soul, KimiSoul)
	app.soul._runtime.approval.set_yolo(True)
	console.print("[green]✓[/green] Life is short, use YOLO!")
	"""Enable or disable YOLO mode (auto approve all actions)
	Usage:
	/yolo # enable YOLO mode
	/yolo on # enable YOLO mode
	/yolo off # disable YOLO mode
	"""
	assert isinstance(app.soul, KimiSoul)
	# Determine desired state
	if not args or (args[0].lower() in {"on", "enable"}):
	app.soul._runtime.approval.set_yolo(True)
	console.print("[green]✓[/green] Life is short, use YOLO!")
	elif args[0].lower() in {"off", "disable"}:
	app.soul._runtime.approval.set_yolo(False)
	console.print("[yellow]YOLO mode disabled.[/yellow]")
	else:
	console.print("[red]Invalid argument. Use `/yolo [on|off]`.[/red]")