* Set console font automatically when selecting language
Add console_font field to languages.json and Language dataclass.
When a language is activated, setfont is called automatically,
falling back to default8x16 on error or for languages without
a custom font. Also activate translation when loading language
from config file.
* 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.
* CI checks fix
* Try to restore original console font with setfont -O
* Fix for pylint
* Restore console font before Textual exits application mode
Move font set/restore into Textual lifecycle to prevent color
artifacts from 256/512 glyph transitions. Apply FONT env var
and language font in on_mount, restore in _on_exit_app.
Skip font change when loading language from config (set_font=False)
to defer it until TUI starts.
* Fall back to language font mapping when FONT env var is invalid
Add _using_env_font flag to skip mapping only when FONT was
successfully applied. Show info message after TUI exits if FONT
could not be set.
* Use tempfile for console font backup files
* Fix linter errors: use mkstemp, close fds, add @override
* Fix ruff formatting
* Move font state from module singleton into TranslationHandler
* Refactor font handling per review feedback
* Make font methods members of TranslationHandler, skip on non-ISO
* ci: trigger tests
* Move running_from_iso import to module level
No circular dep, simpler than per-method local imports.
* Add explicit ISO guard to restore_console_font
Matches the existing guards in _set_font and save_console_font.
Behaviour was already safe implicitly via _font_backup=None, but
the explicit check makes intent obvious at the call site.
* Skip apply_console_font off-ISO
* Use list form for setfont SysCommand calls
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