Switch imports to the charm.land v2 modules. Return tea.View from Model.View,
set alt screen and window title there, use KeyPressMsg and the "space" key
name, and call SetWidth on text inputs.
* gosec govulncheck runs
* Fix flaky TestRateLimiter_Matrix test
The test was failing due to two issues:
1. Test name generation used invalid character conversion (string(rune('0'+limit)))
which produced non-printable characters for limits >= 10
2. Using 10ms windows with 100 requests caused race conditions - early requests
would expire before all 100 were made, allowing the 101st request
Changed to use struct-based test cases with proper fmt.Sprintf naming and
a consistent 1-second window that won't expire during rapid test execution.
lukaszraczylo
