Feat: colorscheme popup [WIP]

tui.go

@@ -96,6 +96,7 @@ var (
 [yellow]Alt+8[white]: show char img or last picked img
 [yellow]Alt+9[white]: warm up (load) selected llama.cpp model
 [yellow]Alt+t[white]: toggle thinking blocks visibility (collapse/expand <think> blocks)
+[yellow]Alt+c[white]: show colorscheme selection popup
 
 === scrolling chat window (some keys similar to vim) ===
 [yellow]arrows up/down and j/k[white]: scroll up and down
@@ -560,6 +561,10 @@ func init() {
 			}
 			return nil
 		}
+		if event.Key() == tcell.KeyRune && event.Rune() == 'i' && event.Modifiers()&tcell.ModAlt != 0 {
+			showColorschemeSelectionPopup()
+			return nil
+		}
 		if event.Key() == tcell.KeyF1 {
 			// chatList, err := loadHistoryChats()
 			chatList, err := store.GetChatByChar(cfg.AssistantRole)