fix(layout): measure intrinsic row and text sizes with resolved child widths

[DavidWilliamBalbino]

Problem

Since the variable-font measurement work, a Row whose children are flexible controls (flex-grow: 1; min-width: 0) holding an icon and a label — e.g. a quick-action bar of Pressables — is laid out with a collapsed cross size (a 7 dp tall row whose children overflow and get clipped), and a fixed 48×48 Pressable beside a text column in a space-between row can disappear entirely. Linkinpay's Home renders correctly with the 1.0.13 engine and breaks with 1.0.26/1.0.28.

Change

Cherry-picks the ordered engine-only layout fixes from the local fix/intrinsic-text-cross-width line (author: davidbalbino), which are self-contained in crates/pam-native-engine/src/layout.rs:

• measure intrinsic text height at the child's cross-axis width
• resolve intrinsic percentage widths only at the containing block
• use consistent platform metrics for text wrapping
• measure uppercase fallback glyphs without clipping short labels
• measure row height with resolved flex child widths

Engine suite: 75 tests pass. Verified on an API 36 emulator with the Linkinpay Home: header account button and the quick-action row regain their full frames.

🤖 Generated with Claude Code