v0.5.0

• Mouse-wheel scrolling now uses Chromium's animation physics: smooth eased motion that picks up speed as you keep spinning, and pixel-precise one-to-one scrolling on touchpads. This also fixes wheel scrolling on Wayland, where notches previously fell back to a slow flick.
• Text stays crisp at fractional display scale factors by falling back to Qt's text rendering, fixing blurry or unevenly spaced glyphs on hidpi screens.
• The save, open, and search icons render at full physical resolution instead of stretching blurry on hidpi screens.
• The scroll bar now stops above the footer, so it no longer overlaps the word count.