[tiensonqin]

Bare dynamic content can emit stack.display=contents, which Apple rejects while rendering native query views. Use a box anchor so native backends can flatten its children.

Support scrollable Material tabs and container-width Android search fields. On Apple, render inline search as one native surface instead of an isolated rounded black input. Preserve sheet theme ancestry through extension nodes, including appearance overrides, propagate semantic colors into modal content, and use the themed background for navigation lists. Grouped list inputs use their native row surface. Android sheets honor a requested medium detent and retain the surrounding theme.

Validation:

• Full dune runtest gate for the dynamic anchor regression.
• Four new light/dark Android snapshots verify scrollable tabs and search width.
• Actual iOS runtime regressions reproduce search overflow, system-gray dark sheets, and rounded black grouped inputs before the changes. They pass after the fixes, checking pixel colors, partial sheet height, native input style, visible content, dismissal, and the result-view action pipeline.
• Mobile Android instrumentation passes five flows, including a regression that fails before and passes after medium-detent support, saved view switching, priority menus, typed edits, and lazy queries.

The full Android snapshot gate has six existing failures on the base: four outdated screenshots and two missing identity video fixtures. These reproduce without this patch, and the four legacy rendered images are byte-identical with and without the earlier responsive-control changes. Existing baselines are preserved.