Improve-ImgSLI

Runs Improve-ImgSLI developer tools for debugging and validation. Use when investigating runtime UI bugs, trace chains, theme or QSS mismatches, translation gaps, stale shaders, startup timing, codebase size questions, or before large refactors.

Fixes Improve-ImgSLI UI using sli-ui-toolkit documentation before reading toolkit source. Use for buttons, flyouts, dialogs, theming, painter pipeline, widget styling, toolkit API questions, or when a control looks wrong but app logic seems fine.