Refactor RevenueSection to utilize a betterPricesMap for improved price handling

- Replaced direct product.betterPrices usage with a betterPricesMap to store prices separately, enhancing data management.
- Updated computed properties and methods to clear betterPricesMap when product list or region changes, ensuring accurate price loading.
- Introduced getBetterPrices method for cleaner access to price data, improving code readability and maintainability.

frontend/src/components/falukant/RevenueSection.vue

@@ -28,8 +28,8 @@
               <td>{{ calculateProductProfit(product).absolute }}</td>
               <td>{{ calculateProductProfit(product).perMinute }}</td>
               <td>
-                <div v-if="product.betterPrices && product.betterPrices.length > 0" class="price-cities">
-                  <span v-for="city in product.betterPrices" :key="city.regionId" 
+                <div v-if="getBetterPrices(product.id) && getBetterPrices(product.id).length > 0" class="price-cities">
+                  <span v-for="city in getBetterPrices(product.id)" :key="city.regionId" 
                         :class="['city-price', getCityPriceClass(city.branchType)]"
                         :title="`${city.regionName}: ${formatPrice(city.price)}`">
                     {{ city.regionName }}
@@ -59,6 +59,7 @@
       return {
         isRevenueTableOpen: false,
         loadingPrices: new Set(),
+        betterPricesMap: {}, // Map von productId zu betterPrices Array
       };
     },
     computed: {
@@ -83,14 +84,22 @@
         }
       },
       products: {
-        handler() {
+        handler(newProducts, oldProducts) {
+          // Leere betterPricesMap wenn sich die Produktliste ändert
+          if (oldProducts && oldProducts.length > 0) {
+            this.betterPricesMap = {};
+          }
           if (this.isRevenueTableOpen && this.currentRegionId !== null) {
             this.loadPricesForAllProducts();
           }
         },
         deep: true
       },
-      currentRegionId(newVal) {
+      currentRegionId(newVal, oldVal) {
+        // Leere betterPricesMap wenn sich die Region ändert
+        if (oldVal !== null && oldVal !== undefined) {
+          this.betterPricesMap = {};
+        }
         if (this.isRevenueTableOpen && newVal !== null) {
           this.loadPricesForAllProducts();
         }
@@ -111,7 +120,9 @@
           if (this.loadingPrices.has(product.id)) continue;
           this.loadingPrices.add(product.id);
           try {
+            // Verwende den gerundeten Preis aus calculateProductRevenue (wie gewollt)
             const currentPrice = parseFloat(this.calculateProductRevenue(product).absolute);
+            
             const { data } = await apiClient.get('/api/falukant/products/prices-in-cities', {
               params: {
                 productId: product.id,
@@ -119,15 +130,19 @@
                 currentRegionId: this.currentRegionId
               }
             });
-            this.$set(product, 'betterPrices', data || []);
+            // Speichere betterPrices in einem separaten Map, nicht auf dem product Objekt
+            this.$set(this.betterPricesMap, product.id, data || []);
           } catch (error) {
             console.error(`Error loading prices for product ${product.id}:`, error);
-            this.$set(product, 'betterPrices', []);
+            this.$set(this.betterPricesMap, product.id, []);
           } finally {
             this.loadingPrices.delete(product.id);
           }
         }
       },
+      getBetterPrices(productId) {
+        return this.betterPricesMap[productId] || [];
+      },
       getCityPriceClass(branchType) {
         if (branchType === 'store') return 'city-price-green';
         if (branchType === 'production') return 'city-price-orange';