Remove MSW handlers and update demo credentials for improved standardization

- Deleted `admin.ts`, `auth.ts`, and `users.ts` MSW handler files to streamline demo mode setup.
- Updated demo credentials logic in `DemoCredentialsModal` and `DemoModeBanner` for stronger password requirements (≥12 characters).
- Refined documentation in `CLAUDE.md` to align with new credential standards and auto-generated MSW workflows.

frontend/src/components/charts/index.ts

@@ -6,7 +6,7 @@ export { ChartCard } from './ChartCard';
 export { UserGrowthChart } from './UserGrowthChart';
 export type { UserGrowthData } from './UserGrowthChart';
 export { OrganizationDistributionChart } from './OrganizationDistributionChart';
-export type { OrganizationDistributionData } from './OrganizationDistributionChart';
+export type { OrgDistributionData } from './OrganizationDistributionChart';
 export { RegistrationActivityChart } from './RegistrationActivityChart';
 export type { RegistrationActivityData } from './RegistrationActivityChart';
 export { UserStatusChart } from './UserStatusChart';