Create v2/scripts/test-all.sh (vitest + cargo + optional E2E via --e2e).
Add npm scripts: test:all, test:all:e2e, test:cargo.
Add .claude/rules/20-testing-gate.md requiring full suite after major changes.
Add .claude/rules/18-relative-units.md enforcing rem/em for layout CSS
(px only for icons/borders). Convert GlobalTabBar.svelte and App.svelte
sidebar styles from px to rem. Change rail-btn color to --ctp-subtext0.
- Create .claude/rules/ with all 17 standard rule files (01-security through 17-document-imports)
- Add Operational Rules section with Rule Index to .claude/CLAUDE.md