Feat: collapse/expand thinking blocks with alt+t

main.go

@@ -12,6 +12,7 @@ var (
 	injectRole          = true
 	selectedIndex       = int(-1)
 	shellMode           = false
+	thinkingCollapsed   = false
 	indexLineCompletion = "F12 to show keys help | llm turn: [%s:-:b]%v[-:-:-] (F6) | chat: [orange:-:b]%s[-:-:-] (F1) | toolUseAdviced: [%s:-:b]%v[-:-:-] (ctrl+k) | model: [orange:-:b]%s[-:-:-] (ctrl+l) | skip LLM resp: [%s:-:b]%v[-:-:-] (F10)\nAPI: [orange:-:b]%s[-:-:-] (ctrl+v) | recording: [%s:-:b]%v[-:-:-] (ctrl+r) | writing as: [orange:-:b]%s[-:-:-] (ctrl+q) | bot will write as [orange:-:b]%s[-:-:-] (ctrl+x) | role injection (alt+7) [%s:-:b]%v[-:-:-]"
 	focusSwitcher       = map[tview.Primitive]tview.Primitive{}
 )