Use this skill when designing terminal user interfaces, creating TUI layouts, choosing TUI color schemes, implementing keyboard AND mouse navigation, building terminal dashboards, or working with any TUI framework. Activates on mentions of TUI design, terminal UI, Ratatui layout, Ink components, Textual widgets, Bubbletea views, terminal color palette, keybinding design, panel layout, split panes, terminal dashboard, box-drawing characters, sparklines, progress bars, modal dialogs, focus management, mouse support, clickable terminal UI, or terminal accessibility. Always consult this skill when a TUI is being built or restyled, even if the user only asks for it to "look modern" or "feel clickable" — mouse interaction and visual polish are core to this skill, not an afterthought.