- Add must_change_password field to User model with migration b023
- Add POST /auth/change-password endpoint with password policy validation
- Add require_password_changed dependency to block requests until password is changed
- Add ChangePasswordModal with live password policy checklist (forced on first login)
- Show password policy in CreateUserModal and EditUserModal
- Fix backend permissions: tests, campaigns, templates, reports, evidence, worklogs
- red_tech/blue_tech: execute only, cannot create tests/campaigns/templates
- red_lead/blue_lead: create/edit tests/campaigns/templates, generate reports, no system access
- viewer: read-only everywhere, can generate reports
- Fix frontend role checks across TestDetailPage, TestDetailHeader, TeamTabs, TestsPage, CampaignsPage, CampaignDetailPage, Sidebar
