**Test Group Member Management:**
- Refactor member data structure from simple ID array to object array with sequence numbers
- Update member objects to include both TestSiteID and Member (sequence) fields
- Fix addMember() to assign sequential Member numbers automatically
- Fix removeMember() to re-sequence remaining members after removal
- Fix moveMember() to properly swap and re-sequence members
- Add sorting by sequence number in members list display
- Update payload builder in tests.js to use proper object structure for API
- Update TestFormModal.svelte member mapping for edit mode
**Documentation:**
- Add TypeScript Types section to AGENTS.md with TestType and TestSummary examples
- Reorganize TODO.md with new test type categories and backend notes
**Cleanup:**
- Remove deprecated OpenSpec skills from .opencode/ directory:
- opsx-apply.md, opsx-archive.md, opsx-explore.md, opsx-propose.md
- openspec-apply-change/SKILL.md, openspec-archive-change/SKILL.md
- openspec-explore/SKILL.md, openspec-propose/SKILL.md
**New Files:**
- Add .serena/memories/ for code style conventions and task tracking
- 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
