An in-app debug drawer for Compose Multiplatform apps — a Square Cascade-style developer menu with a pluggable section system. Built-in sections: feature flag toggles, network request log, environment switcher, log viewer, device info, screenshot+log+state bundle export, KV storage inspector, performance HUD. Auto-tree-shaken in release builds; activates via shake / 3-finger tap / keyboard shortcut. One drawer for Android, iOS, Desktop, and Web.