feat: groups price calculator admin crud, booking/offer flow and api

.env

@@ -48,6 +48,15 @@ MAILJET_DEFAULT_LIST_ID=
 MAILJET_WEBHOOK_BASIC_PASSWORD=secret
 APP_NEWSLETTER_CONFIRMATION_TTL_HOURS=1
 
+# Dedicated signing secret for accommodation booking customer access links (kept separate
+# from APP_SECRET so it can be rotated independently). Unlike lazily-used API keys, UriSigner
+# validates this is non-empty at construction time, so a real dev value is required here
+# (override in .env.local/production secrets as usual).
+ACCOMMODATION_OFFER_LINK_SECRET=abf8ec28cc2162d9121d35d6f8cbf7c29728cdacce0303e22e1bac854501728a
+
+BPN_CONNECT_BASE_URL=https://bpn-connect.ep-reisen.app
+BPN_CONNECT_API_KEY=
+
 APP_BPN_USER=
 APP_BPN_PASSWORD=
 APP_BPN_IP=
@@ -72,20 +81,26 @@ APP_TRAVEL_PREFER_REMOTE=false
 APP_TRAVEL_ENABLE_FALLBACK=true
 APP_TRAVEL_SNAPSHOT_RETENTION_BUFFER_DAYS=14
 
-# Feature Flags
-FEATURE_TRAVEL_SNAPSHOT=true
-
 # Emails
 APP_DEFAULT_EMAIL_FROM=[email protected]
 APP_DEFAULT_EMAIL_TO=[email protected]
+ACCOMMODATION_INQUIRY_EMAIL=[email protected]
+
+# Global common defaults
+APP_SEASON_WINTER_FROM=2026-10-01
+APP_SEASON_SUMMER_FROM=2026-05-01
+APP_RUNNING_COSTS_FACTOR_EUR=2.75
+APP_RUNNING_COSTS_FACTOR_CHF=3.2
+APP_UNDERSUBSCRIPTION_SURCHARGE_30_EUR=5.0
+APP_UNDERSUBSCRIPTION_SURCHARGE_30_CHF=5.0
+APP_UNDERSUBSCRIPTION_SURCHARGE_40_EUR=2.5
+APP_UNDERSUBSCRIPTION_SURCHARGE_40_CHF=2.5
 
 # Booking Configuration
 # Status for new bookings: 'F' (Fixed/Final), 'O' (Option - requires agency confirmation)
 # Use 'O' during beta phase, switch to 'F' for production
 DEFAULT_BOOKING_STATUS=F
 
-API_KEYS=
-
 XML_EXPORT_PATH="%kernel.project_dir%/var/xmlexport"
 XML_EXPORT_CONTINGENTS_PATH="%kernel.project_dir%/var/xmlexportzimmer"
 JSON_EXPORT_PATH="%kernel.project_dir%/var/jsonexport"