Move level-to-style mapping into MsgLevelType.style() method

Replace the module-level _LEVEL_STYLE dict in components.py with a
style() method on the MsgLevelType enum, following the project
convention of encapsulating type-bound logic on the type itself.

archinstall/tui/components.py

@@ -27,14 +27,6 @@ from archinstall.tui.result import Result, ResultType
 ValueT = TypeVar('ValueT')
 
 
-_LEVEL_STYLE: dict[MsgLevelType, str] = {
-	MsgLevelType.MsgNone: '',
-	MsgLevelType.MsgError: 'red',
-	MsgLevelType.MsgWarning: 'bright_yellow',
-	MsgLevelType.MsgInfo: 'green',
-}
-
-
 def _update_preview(widget: Label, result: str | PreviewResult | list[PreviewResult] | None) -> None:
 	if result is None:
 		widget.update('')
@@ -43,14 +35,14 @@ def _update_preview(widget: Label, result: str | PreviewResult | list[PreviewRes
 	if isinstance(result, str):
 		widget.update(result)
 	elif isinstance(result, PreviewResult):
-		text = Text(result.message, style=_LEVEL_STYLE[result.msg_level])
+		text = Text(result.message, style=result.msg_level.style())
 		widget.update(text)
 	else:
 		text = Text()
 		for i, section in enumerate(result):
 			if i > 0:
 				text.append('\n\n')
-			text.append(section.message, style=_LEVEL_STYLE[section.msg_level])
+			text.append(section.message, style=section.msg_level.style())
 		widget.update(text)
 
 

archinstall/tui/menu_item.py

@@ -15,6 +15,17 @@ class MsgLevelType(Enum):
 	MsgWarning = auto()
 	MsgError = auto()
 
+	def style(self) -> str:
+		match self:
+			case MsgLevelType.MsgNone:
+				return 'white'
+			case MsgLevelType.MsgInfo:
+				return 'green'
+			case MsgLevelType.MsgWarning:
+				return 'bright_yellow'
+			case MsgLevelType.MsgError:
+				return 'red'
+
 
 @dataclass
 class PreviewResult: