- Consolidate fragmented test modal components into unified TestFormModal.svelte
- Reorganize reference range components into organized tabs (RefNumTab, RefTxtTab)
- Add new tab components: BasicInfoTab, TechDetailsTab, CalcDetailsTab, MappingsTab, GroupMembersTab
- Move test-related type definitions to src/lib/types/test.types.ts for better type organization
- Delete old component files: TestModal.svelte and 10+ sub-components
- Add backup directory for old component preservation
- Update AGENTS.md with coding guidelines and project conventions
- Update tests.js API client with improved structure
- Add documentation for frontend test management architecture
