chore: Bump version to v0.1.5.1

Das Feature-Flag USE_MULTI_TREATMENTS_AVAILABILITY war noch auf false,
wodurch das Formular die alte treatmentId statt treatmentIds[] API verwendete.
Dies verhinderte das Laden verfügbarer Uhrzeiten.

package.json

@@ -1,7 +1,7 @@
 {
   "name": "quests-template-basic",
   "private": true,
-  "version": "0.1.4",
+  "version": "0.1.5.1",
   "type": "module",
   "scripts": {
     "check:types": "tsc --noEmit",

src/client/components/booking-form.tsx

@@ -3,7 +3,7 @@ import { useMutation, useQuery } from "@tanstack/react-query";
 import { queryClient } from "@/client/rpc-client";
 
 // Feature flag for multi-treatments availability API compatibility
-const USE_MULTI_TREATMENTS_AVAILABILITY = false;
+const USE_MULTI_TREATMENTS_AVAILABILITY = true;
 
 export function BookingForm() {
   const [selectedTreatments, setSelectedTreatments] = useState<Array<{id: string, name: string, duration: number, price: number}>>([]);