Restore Options dialog tree/section chrome to capture scale

[baseGame]

Summary

• Restore Options / Settings dialog chrome toward capture-aligned shell metrics (DPR≈2, shared Restore Home and shell chrome to capture CSS metrics #301–Restore Hex in-view row/wrap chrome to capture scale #319 scale): tree rows ~18px, group labels/hints 11px/16px, card headers ~20px, stack/open-with controls ~20px, borders #a0a0a0 (do not crush to 6–9px).
• Align densify CSS + peekOptionsDensity Options assertions; no new deep option content invented.
• Out of scope: Version/Registry session polish; encoding chip interactivity.

Test plan

• peekOptionsDensity Options cases + SettingsView unit tests
• format / lint / stylelint / typecheck / rust checks via pre-commit
• Visual check Options tree + section cards vs shell scale