wip: implement transportation, pickups and parking

docs/PRICING_DISPLAY_IMPLEMENTATION.md

@@ -60,6 +60,7 @@ foreach ($bookingDto->getParticipants() as $participant) {
 **Enhancement**: Service labels include pricing via `formatServiceLabelWithPrice()` method
 - Zero-priced services display without price suffix (e.g., "Vollpension" instead of "Vollpension (€0,00)")
 - Priced services show with formatted price (e.g., "Halbpension (€45,00)")
+- Negative prices display as discounts (e.g., "Frühbucher-Bonus (-15,00€ Rabatt)")
 - All services consistently show quantity prefix (e.g., "1x", "2x")
 
 **Service Label Formatting Logic**:
@@ -68,21 +69,28 @@ private function formatServiceLabelWithPrice(Service $service): string
 {
     $label = $service->label;
     
-    // Add price only if service has a cost
-    if ($service->price > 0) {
-        $label .= sprintf(' (€%.2f)', $service->price);
+    // Handle zero prices (no display)
+    if (null === $service->price || 0.0 === $service->price) {
+        return $label;
     }
     
-    return $label;
+    // Handle negative prices (discounts)
+    if ($service->price < 0) {
+        return sprintf('%s (-%s€ Rabatt)', $label, number_format(abs($service->price), 2, ',', '.'));
+    }
+    
+    // Handle positive prices (costs)
+    return sprintf('%s (€%s)', $label, number_format($service->price, 2, ',', '.'));
 }
 ```
 
 **Affected Service Types**:
-- Courses: `"Skikurs Anfänger (€25,00)"`
-- Additional Services: `"Versicherung (€15,00)"`  
-- Ski Pass: `"5-Tage Skipass (€120,00)"`
-- Rentals: `"Ski-Set (€30,00)"`
-- Board: `"Halbpension (€45,00)"` or `"Vollpension"` (if €0,00)
+- Courses: `"Skikurs Anfänger (€25,00)"` or `"Frühbucher-Bonus (-15,00€ Rabatt)"`
+- Additional Services: `"Versicherung (€15,00)"` or `"Stammgast-Vorteil (-5,00€ Rabatt)"`  
+- Ski Pass: `"5-Tage Skipass (€120,00)"` or `"Gruppen-Rabatt (-20,00€ Rabatt)"`
+- Rentals: `"Ski-Set (€30,00)"` or `"Eigenes Equipment (-30,00€ Rabatt)"`
+- Board: `"Halbpension (€45,00)"`, `"Vollpension"` (if €0,00), or `"Selbstverpflegung (-25,00€ Rabatt)"`
+- Pickup Services: `"München Hbf (€15,00)"` or `"Nahverkehr (-5,00€ Rabatt)"`
 
 ### 3. Enhanced Unified Booking Summary ✅ COMPLETED