fix: prevent calc(% - px) collapse in flex items and input focus scroll jump

[andycall]

Summary

• fix(webf): Prevent calc(% - px) from collapsing to 0 inside shrink-to-fit flex items by refining _hasDefiniteInlineSize to not treat auto-sized flex item widths as definite for percentage resolution
• fix(rendering): Prevent input focus from scrolling the outer page to top by forwarding revealed descendant bounds (instead of null) to ancestor showOnScreen calls

Test plan

• Added widget unit test for calc layout in shrink-to-fit flex items (css_calc_layout_test.dart)
• Added widget unit test for show-on-screen focus behavior (show_on_screen_focus_test.dart)
• Added integration test with snapshot for flex-shrink-to-fit-calc pattern
• Updated existing flex-grow snapshots

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
use-case	Ready	Preview, Comment	Feb 8, 2026 5:02pm
vue_usecase	Ready	Preview, Comment	Feb 8, 2026 5:02pm