[QA] VERIFIED - All acceptance criteria met. Implementation was completed by TRCKR-616 (commit 9ca737a). All 4 E2E tests exist and are properly structured: 1. test_update_project_status_to_complete_from_active 2. test_update_project_status_from_triage_to_complete 3. test_update_project_status_from_on_hold_to_complete 4. test_update_project_status_to_complete_reflects_in_table Tests use Playwright E2E testing with proper API setup, UI interactions, and persistence verification. Production safety measures confirmed in place (blocked domains in conftest.py). See /tmp/qa-TRCKR-526.md for full QA report.

This issue was already implemented by TRCKR-616 (commit 9ca737a). The E2E test file tests/e2e/test_update_project_status_to_complete.py exists and all 4 tests pass: 1. test_update_project_status_to_complete_from_active - Update from active to complete 2. test_update_project_status_from_triage_to_complete - Update from triage to complete 3. test_update_project_status_from_on_hold_to_complete - Update from on-hold to complete 4. test_update_project_status_to_complete_reflects_in_table - Verify table reflects the change Verified tests pass with E2E_BASE_URL=http://localhost:8000.