fix: resolve memory leaks and improve resource cleanup

[nikomatt69]

This PR addresses several memory leak issues identified during code analysis:

• Improved cleanup of global process listeners (SIGINT, SIGTERM) in NikCLI and Unified Chat.
• Added explicit removal of event listeners for authProvider and agentService during shutdown.
• Ensured readline interface listeners are removed before closing.
• Fixed potential listener accumulation in Unified CLI during multiple starts/stops.

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Workers

The latest updates on your project. Learn more about integrating Git with Workers.

Status	Name	Latest Commit	Updated (UTC)
❌ Deployment failed View logs	nikcli	dea44bf	Jan 06 2026, 06:10 AM