* 🐛 Resize fit-content flex boards while typing in v3 text editor
Typing in an auto-width text did not resize its fit-content layout
parent until the editor closed. The v3 editor now previews the live
text size in the layout on each keystroke, also when the text sits
in a group.
* 🐛 Preview text layout when typing with a pending caret style
Both v3 editor commit paths share v3-update-editor-content.
* 🐛 Skip the layout preview for absolute texts
Absolute layout items do not affect their board.
* ⚡ Preview text layout only when the text size changes
Each preview propagates modifiers, so skip unchanged sizes.
* 🐛 Leave interactive render mode when the v3 editor closes
Finalize only ends it when it applies geometry.
* 🐛 Fix dropdown shown Mixed Font Families for same family with different variant
* 🐛 Fix variants dropdown appearing blank on mixed variants but same family
* ✨ Add playwright test for mixed font families/variants
