Support FONT environment variable for console font override

When FONT env var is set, use it as the console font instead of the language-specific font mapping from languages.json. The font is applied at startup and preserved across language switches.

On exit (success or failure), restore the console font to default8x16.

archinstall/lib/translationhandler.py

@@ -34,6 +34,7 @@ class Language:
 
 
 _DEFAULT_FONT = 'default8x16'
+_ENV_FONT = os.environ.get('FONT')
 
 
 def _set_console_font(font_name: str | None) -> None:
@@ -158,7 +159,8 @@ class TranslationHandler:
 		"""
 		# The install() call has the side effect of assigning GNUTranslations.gettext to builtins._
 		language.translation.install()
-		_set_console_font(language.console_font)
+
+		_set_console_font(_ENV_FONT if _ENV_FONT else language.console_font)
 
 	def _get_locales_dir(self) -> Path:
 		"""

archinstall/main.py

@@ -16,7 +16,7 @@ from archinstall.lib.networking import ping
 from archinstall.lib.output import debug, error, info, warn
 from archinstall.lib.packages.util import check_version_upgrade
 from archinstall.lib.pacman.pacman import Pacman
-from archinstall.lib.translationhandler import tr
+from archinstall.lib.translationhandler import _ENV_FONT, _set_console_font, tr
 from archinstall.lib.utils.util import running_from_iso
 from archinstall.tui.ui.components import tui
 
@@ -79,6 +79,9 @@ def run() -> int:
 	OR straight as a module: python -m archinstall
 	In any case we will be attempting to load the provided script to be run from the scripts/ folder
 	"""
+	if _ENV_FONT:
+		_set_console_font(_ENV_FONT)
+
 	arch_config_handler = ArchConfigHandler()
 
 	if '--help' in sys.argv or '-h' in sys.argv:
@@ -159,6 +162,8 @@ def main() -> int:
 			_error_message(exc)
 			rc = 1
 
+		_set_console_font(None)
+
 	return rc