Tasks: Native UI refinement

• T001 Ground native rendering/focus/theme behavior and specify the user-visible refinement.
• T002 Compare two whole design candidates, cross-review and record synthesis. Blocked by T001.
• T003 Reproduce narrow approval layout, implement readable wrapped question/choices and verify answer/VTE behavior. Blocked by T002.
• T004 Preserve sidebar urgency alongside Close; refine hierarchy, focus and accessible names. Blocked by T002.
• T005 Make frequent navigation immediate and honor native motion/contrast preferences; verify feedback. Blocked by T002.
• T006 Verify deterministic native light/dark/narrow/contrast/font scenes and reliability probes. Blocked by T003–T005.
• T007 Review code/motion, run required gates and update presentation docs/verification instructions. Blocked by T006.
• T008 Commit by concern, push main and verify remote checks. Blocked by T007.