Beta 0.4.0 (build 1050-3c4a): unset Paint.typeface renders italic instead of upright

[ablersch]

Talon version: 0.4.0-1050-3c4a (Beta channel, Windows)
Platform: Windows 11

Summary

When a talon.skia.Paint is drawn without explicitly setting .typeface, text now renders in an italic font. Before this beta, the same unset-typeface code rendered upright. This affects Talon's built-in speech subtitles overlay, and any user/community canvas code that draws text without setting a typeface explicitly (e.g. the community subtitles plugin at https://github.com/talonhub/community/tree/main/plugin/subtitles).

Repro

from talon.skia.typeface import Typeface

tf = Typeface.from_name('')
print(tf.family_name, tf.font_slant)  # -> '', 1   (1 = Italic)

Compare with an explicit family name, which correctly resolves upright:

tf = Typeface.from_name('Segoe UI')
print(tf.family_name, tf.font_slant)  # -> 'Segoe UI', 0   (0 = Upright)

A fresh Paint() has .typeface is None, and at draw time that None apparently resolves through the same fallback path as Typeface.from_name(''), i.e. an italic face, rather than the system's default upright UI font as before.

Expected behavior

An unset Paint.typeface (or Typeface.from_name('')) should resolve to an upright font, matching pre-beta behavior.

Observed impact

• Talon's built-in "Show Subtitles" overlay now displays in italic, with no setting to change this.
• Any canvas overlay (own scripts or community plugins) that does not explicitly set paint.typeface is silently affected the same way.

Workaround

Explicitly set paint.typeface = Typeface.from_name("Segoe UI") (or any other named family) before drawing.