Flask-session login scoped to one client_id (never a request param),
self-service + operator-triggered password reset via single-use tokens,
and an Owner accounts tab on the CRM dashboard.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Sends a confirmation email (best-effort, fire-and-forget SMTP via mailer.py)
on booking creation, with a manage-booking link embedding the ticket-2 signed
token. Adds /manage/<token>, a stateless cancel/reschedule page that reuses
the existing slot-picker against booking_api's create/cancel/reschedule API,
distinguishing an invalid/expired link from an already-cancelled one. Sender
address uses the client's own domain when configured, falling back to a
mivanchenko.de address otherwise.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
mivanchenko