UI changes\n- replaces the main founder reset action with a new Delete one test/demo business tool\n- adds a selectable founder-only business list with business name, owner email, real-vs-test/demo status, archive state, and permanent-delete warning\n- requires typing the exact business name before the Delete this business button enables\n- moves Delete all current businesses into an advanced founder reset disclosure instead of the primary destructive action\n\n## Safety rules\n- keeps hard delete limited to archived test/demo businesses through the existing server-side eligibility checks\n- keeps real customer businesses on the archive-first path and shows explicit Archive real customers copy\n- preserves founder/admin authorization, tenant isolation, and existing cascade deletion behavior\n- keeps redirects outside catchable redirect-error paths so normal feedback does not surface NEXT_REDIRECT\n\n## Tests added\n- verifies the single-business delete card is exact-name gated and keeps hard delete narrow\n- verifies deleting one archived demo/test business leaves another business intact\n- verifies the delete action still requires admin auth, exact-name confirmation, and has no redirect-catching pattern\n- verifies the founder reset UI now prioritizes single-business delete and keeps bulk delete in advanced\n\n## Validation\n- npm run typecheck\n- npm run lint\n- npm test\n- npm run build\n\n## Remaining risks\n- the exact-name enable/disable behavior is client-side, so the server action still remains the final authority for confirmation and eligibility\n- the advanced bulk delete action still exists for founder use; it is de-emphasized and still protected, but it remains intentionally available for last-resort cleanup