- Removed invented adminAuthApiUrl endpoint and separate AdminLoginComponent.
Admin login now uses the exact same Telegram session backend
(TelegramSessionApiService, {authApiUrl}/users/sessions) and the exact
same TelegramLoginComponent (mode="customer" | "admin" input) as customer
login - only the storage (cookie/localStorage/signals) stays separate.
- Extracted the shared HTTP+normalization logic from AuthService into
TelegramSessionApiService so both AuthService and AdminAuthService call it
instead of duplicating request/parsing code.
- Documented the resulting backend gap in docs/Project-Editor.md: since the
session API has no concept of "admin", server-side role enforcement is
required when admin API calls are made - the frontend only decides where
to store the session, not whether the user is actually an admin.
