Prioritize workstation lists on narrow screens

[cbusillo]

Summary

• keep the ranked Work/Folders list ahead of the selected-detail inspector on narrow and tablet-width workstation layouts
• delay the Work two-column split until there is enough width for the table to remain readable
• preserve the wide-screen inspector layout while making the first viewport list-first at common browser widths

Validation

• npm --prefix frontend run check
• npm --prefix frontend run test:unit -- --run
• npm --prefix frontend run lint
• npm --prefix frontend run build
• bash scripts/pre-commit-check.sh
• Browser reviewed Work and Folders at 1024x768: first viewport now leads with the ranked list/index instead of the selected detail card
• Playwright checked Work and Folders at 390x844: no horizontal overflow and list section precedes inspector in DOM position

Notes

This is intentionally small: it improves scan speed without changing data contracts or adding another UI concept.