[nicoburns]

Summary

#832 already made inline boxes export their baseline. This PR is what's left of the original change: one fix to the last baseline reported by inline layout.

When inline content ends in a forced line break (e.g. X<br>), Parley still emits an empty line after it, for text-editor semantics. #939 already leaves that line out of the measured height. But last_baseline was still taken from lines().last(), which is that empty line. So an inline-block ending in <br> was positioned one line too low relative to the text beside it.

// before
last_baseline = lines().last().map(line_baseline)
// after: skip the trailing empty line detected by the #939 check
last_baseline = layout.get(trailing_empty_line.unwrap_or(line_count) - 1).map(line_baseline)

Tests

• Added tests/blitz-tests/tests/inline_box_baseline.rs with four tests. trailing_br_does_not_move_last_baseline fails on main. The other three cover inline-block baseline alignment that main already handles correctly: single line, last line of a multi-line box, and a scroll container falling back to its bottom margin edge.
• WPT on css/CSS2, css-inline, css-align, css-flexbox, css-grid, css-tables and css-display: identical results before and after (7043 tests / 26035 subtests passing).

Link to Devin session: https://dioxus.staging.devinenterprise.com/sessions/af67bcfb5eb947fa81ba768501f4c276
Open in Devin Desktop: https://dioxus.staging.devinenterprise.com/desktop/session/af67bcfb5eb947fa81ba768501f4c276?variant=devin-insiders
Requested by: @nicoburns

WPT results

Subtests: 1 newly passing, 0 newly failing (net +1).

Full diff (1 changed tests)

+ FAIL => PASS  [1/1]  +1  css/css-text/letter-spacing/letter-spacing-end-of-line-002.html

_{Generated by the WPT workflow.}

[staging-devin-ai-integration]

I'll fix CI failures and address comments from users with write access that start with 'Devin'.

• Disable automatic comment, CI, and merge conflict monitoring