feat(tui): overhaul theme palette for legibility

Replace Nord and Gruvbox with Rosé Pine and Dracula. Add Kanagawa
and Everforest. Fix legibility issues across remaining themes:

- Tokyo Night: separate Muted from Fg, distinct SelectedBg
- Catppuccin Mocha: bolder semantic colors, tighter zebra, distinct SelectedBg
- Order themes by warm→cool color temperature for smooth cycling

internal/tui/theme.go

@@ -46,10 +46,12 @@ type Theme struct {
 
 var themes = []Theme{
 	themeFlexokiDark,
+	themeEverforest,
+	themeKanagawa,
 	themeTokyoNight,
 	themeCatppuccinMocha,
-	themeNord,
-	themeGruvbox,
+	themeRosePine,
+	themeDracula,
 }
 
 var themeFlexokiDark = Theme{
@@ -80,7 +82,7 @@ var themeTokyoNight = Theme{
 	Panel:      cc("#292e42", ""),
 	Border:     cc("#3b4261", "8"),
 	Fg:         cc("#c0caf5", "15"),
-	Muted:      cc("#a9b1d6", "7"),
+	Muted:      cc("#7982a9", "7"),
 	Subtle:     cc("#565f89", "7"),
 	Success:    cc("#9ece6a", "10"),
 	Warning:    cc("#e0af68", "11"),
@@ -91,28 +93,28 @@ var themeTokyoNight = Theme{
 	Purple:     cc("#bb9af7", "13"),
 	ZebraBg:    cc("#1c1d28", ""),
 	SelectedFg: cc("#c0caf5", "15"),
-	SelectedBg: cc("#292e42", "4"),
+	SelectedBg: cc("#363c53", "4"),
 }
 
-var themeGruvbox = Theme{
-	Name:       "Gruvbox",
-	Bg:         cc("#282828", ""),
-	Surface:    cc("#3c3836", ""),
-	Panel:      cc("#504945", ""),
-	Border:     cc("#665c54", "8"),
-	Fg:         cc("#ebdbb2", "15"),
-	Muted:      cc("#bdae93", "7"),
-	Subtle:     cc("#7c6f64", "7"),
-	Success:    cc("#b8bb26", "10"),
-	Warning:    cc("#fabd2f", "11"),
-	Stale:      cc("#fe8019", "3"),
-	Danger:     cc("#fb4934", "9"),
-	Info:       cc("#83a598", "12"),
-	Accent:     cc("#8ec07c", "14"),
-	Purple:     cc("#d3869b", "13"),
-	ZebraBg:    cc("#2a2a2a", ""),
-	SelectedFg: cc("#fbf1c7", "15"),
-	SelectedBg: cc("#504945", "4"),
+var themeDracula = Theme{
+	Name:       "Dracula",
+	Bg:         cc("#282a36", ""),
+	Surface:    cc("#343746", ""),
+	Panel:      cc("#44475a", ""),
+	Border:     cc("#6272a4", "8"),
+	Fg:         cc("#f8f8f2", "15"),
+	Muted:      cc("#a9b0cb", "7"),
+	Subtle:     cc("#6272a4", "7"),
+	Success:    cc("#50fa7b", "10"),
+	Warning:    cc("#f1fa8c", "11"),
+	Stale:      cc("#ffb86c", "3"),
+	Danger:     cc("#ff5555", "9"),
+	Info:       cc("#8be9fd", "12"),
+	Accent:     cc("#bd93f9", "14"),
+	Purple:     cc("#ff79c6", "13"),
+	ZebraBg:    cc("#2c2e3a", ""),
+	SelectedFg: cc("#f8f8f2", "15"),
+	SelectedBg: cc("#52556b", "4"),
 }
 
 var themeCatppuccinMocha = Theme{
@@ -124,37 +126,79 @@ var themeCatppuccinMocha = Theme{
 	Fg:         cc("#cdd6f4", "15"),
 	Muted:      cc("#a6adc8", "7"),
 	Subtle:     cc("#6c7086", "7"),
-	Success:    cc("#a6e3a1", "10"),
-	Warning:    cc("#f9e2af", "11"),
+	Success:    cc("#7dc47a", "10"),
+	Warning:    cc("#f0c644", "11"),
 	Stale:      cc("#fab387", "3"),
-	Danger:     cc("#f38ba8", "9"),
+	Danger:     cc("#e6546e", "9"),
 	Info:       cc("#89b4fa", "12"),
 	Accent:     cc("#94e2d5", "14"),
 	Purple:     cc("#cba6f7", "13"),
-	ZebraBg:    cc("#232334", ""),
+	ZebraBg:    cc("#212130", ""),
 	SelectedFg: cc("#cdd6f4", "15"),
-	SelectedBg: cc("#45475a", "4"),
+	SelectedBg: cc("#585b70", "4"),
 }
 
-var themeNord = Theme{
-	Name:       "Nord",
-	Bg:         cc("#2e3440", ""),
-	Surface:    cc("#3b4252", ""),
-	Panel:      cc("#434c5e", ""),
-	Border:     cc("#4c566a", "8"),
-	Fg:         cc("#d8dee9", "15"),
-	Muted:      cc("#d8dee9", "7"),
-	Subtle:     cc("#4c566a", "7"),
-	Success:    cc("#a3be8c", "10"),
-	Warning:    cc("#ebcb8b", "11"),
-	Stale:      cc("#d08770", "3"),
-	Danger:     cc("#bf616a", "9"),
-	Info:       cc("#81a1c1", "12"),
-	Accent:     cc("#88c0d0", "14"),
-	Purple:     cc("#b48ead", "13"),
-	ZebraBg:    cc("#323845", ""),
-	SelectedFg: cc("#eceff4", "15"),
-	SelectedBg: cc("#434c5e", "4"),
+var themeRosePine = Theme{
+	Name:       "Rosé Pine",
+	Bg:         cc("#191724", ""),
+	Surface:    cc("#1f1d2e", ""),
+	Panel:      cc("#26233a", ""),
+	Border:     cc("#524f67", "8"),
+	Fg:         cc("#e0def4", "15"),
+	Muted:      cc("#908caa", "7"),
+	Subtle:     cc("#6e6a86", "7"),
+	Success:    cc("#9ccfd8", "10"),
+	Warning:    cc("#f6c177", "11"),
+	Stale:      cc("#ebbcba", "3"),
+	Danger:     cc("#eb6f92", "9"),
+	Info:       cc("#3e8fb0", "12"),
+	Accent:     cc("#c4a7e7", "14"),
+	Purple:     cc("#ebbcba", "13"),
+	ZebraBg:    cc("#1c1a28", ""),
+	SelectedFg: cc("#e0def4", "15"),
+	SelectedBg: cc("#403d52", "4"),
+}
+
+var themeKanagawa = Theme{
+	Name:       "Kanagawa",
+	Bg:         cc("#1F1F28", ""),
+	Surface:    cc("#2A2A37", ""),
+	Panel:      cc("#363646", ""),
+	Border:     cc("#54546D", "8"),
+	Fg:         cc("#DCD7BA", "15"),
+	Muted:      cc("#C8C093", "7"),
+	Subtle:     cc("#727169", "7"),
+	Success:    cc("#98BB6C", "10"),
+	Warning:    cc("#E6C384", "11"),
+	Stale:      cc("#FFA066", "3"),
+	Danger:     cc("#E46876", "9"),
+	Info:       cc("#7E9CD8", "12"),
+	Accent:     cc("#7FB4CA", "14"),
+	Purple:     cc("#D27E99", "13"),
+	ZebraBg:    cc("#22222c", ""),
+	SelectedFg: cc("#DCD7BA", "15"),
+	SelectedBg: cc("#2D4F67", "4"),
+}
+
+var themeEverforest = Theme{
+	Name:       "Everforest",
+	Bg:         cc("#2F383E", ""),
+	Surface:    cc("#343F44", ""),
+	Panel:      cc("#3D484D", ""),
+	Border:     cc("#56635F", "8"),
+	Fg:         cc("#D3C6AA", "15"),
+	Muted:      cc("#9DA9A0", "7"),
+	Subtle:     cc("#7A8478", "7"),
+	Success:    cc("#A7C080", "10"),
+	Warning:    cc("#DBBC7F", "11"),
+	Stale:      cc("#E69875", "3"),
+	Danger:     cc("#E67E80", "9"),
+	Info:       cc("#7FBBB3", "12"),
+	Accent:     cc("#83C092", "14"),
+	Purple:     cc("#D699B6", "13"),
+	ZebraBg:    cc("#30393F", ""),
+	SelectedFg: cc("#D3C6AA", "15"),
+	SelectedBg: cc("#475258", "4"),
 }
 
 func (t Theme) HuhTheme() *huh.Theme {