The sha256Hex helper used window.crypto.subtle.digest(), which is only
available in a secure context (HTTPS / localhost). In the HTTP Docker
environment crypto.subtle is undefined, causing a TypeError before any
request is sent — the setup and login forms both silently failed with
'An unexpected error occurred'.
Fix: pass raw passwords directly to the API. The backend already applies
bcrypt, which is sufficient. No stored hashes need migration because
setup never completed successfully in the HTTP environment.
* frontend/src/pages/SetupPage.tsx — remove sha256Hex call
* frontend/src/api/auth.ts — remove sha256Hex call
* frontend/src/pages/__tests__/SetupPage.test.tsx — drop crypto mock
* frontend/src/utils/crypto.ts — deleted (no remaining callers)