Drink gets a year field (default 2024 for legacy rows), with name+year
unique together so each festival can have its own price/crate config
without overwriting the previous year. User balance properties
(consumed_drinks_price, paid_amount, open_balance) and the new
current_year() helper all filter by current year so year-over-year data
stays separated.
UserPayment model tracks per-user payments (cash/PayPal/bank/other)
against their drink tab, separate from Donation (event-level income).
Verbose names + Meta verbose_name(_plural) added across all models, and
LANGUAGE_CODE set to "de" so the admin renders German throughout.
Drink gains a few derived properties (crates_full_returned,
crates_remaining, bottles_consumed, bottles_remaining,
remaining_purchase_value) used by the upcoming admin and dashboard
views.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Self-service drink tab at /suff/ for festival attendees. Users log in
with username + 3-digit PIN stored in a separate User.pin field, so
staff/admin accounts can keep their strong password for /admin/ and
also use the drink tool with the same username. PINs for staff users
must be set from the admin panel via a dedicated "PIN setzen" view to
prevent account takeover by name collision.
Time-gated to the festival window (Thu–Sun in Berlin tz) with phases
before/booking/readonly/closed; in non-production mode the tool is
always in booking phase for local testing.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
flo