tui

type Config struct {
	ImageRef string
	Resolver image.Resolver
	NoCache  bool
	// Platform is the canonical "os/arch[/variant]" string the user passed
	// via --platform, or "" when no pin was set. Display-only: shown in the
	// header so the operator knows which variant of a multi-platform image
	// is on screen. Resolver behaviour is governed by image.WithPlatform,
	// not this field.
	Platform string
	// Theme is the name of the colour theme to use. Empty string means the
	// built-in default (tokyo-night). Valid values match the names accepted
	// by the theme: key in .layerx.yaml.
	Theme string
	// TransparentBg strips all background colours from the TUI so the
	// terminal's own background shows through. Opt-in; default false.
	TransparentBg bool
}

type Theme struct {
	// Accent / brand
	Accent color.Color

	// Panel borders
	FocusedBorder   color.Color
	UnfocusedBorder color.Color

	// Selection
	Selected   color.Color
	SelectedBg color.Color

	// Diff
	Added     color.Color
	Modified  color.Color
	Removed   color.Color
	Unchanged color.Color

	// Chrome (status bar, header)
	Separator color.Color
	Command   color.Color
	StatusKey color.Color
	StatusDim color.Color
	StatusBg  color.Color
	HeaderDim color.Color
	HeaderSep color.Color
	FileName  color.Color

	// Dim / tree
	MetaDim   color.Color
	TreeDim   color.Color
	ScrollDim color.Color

	// Search
	SearchHighlightBg color.Color
	SearchCurrentBg   color.Color
	SearchCurrentFg   color.Color

	// Overall terminal background (set via tea.WithBackgroundColor).
	// Gives the whole UI a consistent base so header/footer bars feel
	// grounded rather than floating on pure black.
	MainBg color.Color

	// Chroma syntax highlight theme name (passed to chroma styles.Get)
	ChromaStyle string

	// GradientStart and GradientEnd define the colour sweep applied to the
	// image ref in the header bar. Blue→purple is the default direction;
	// each theme tunes the exact stops to complement its palette.
	GradientStart color.Color
	GradientEnd   color.Color
}