Enhance product price retrieval by including currentRegionId in FalukantController and FalukantService

- Updated the FalukantController to accept currentRegionId as a parameter for fetching product prices in cities.
- Modified the FalukantService to incorporate currentRegionId in the price calculation logic, allowing exclusion of the current region from results.
- Adjusted frontend components to pass currentRegionId, improving the accuracy of price comparisons and user experience.

backend/controllers/falukantController.js

@@ -155,10 +155,11 @@ class FalukantController {
         this.getProductPricesInCities = this._wrapWithUser((userId, req) => {
             const productId = parseInt(req.query.productId, 10);
             const currentPrice = parseFloat(req.query.currentPrice);
+            const currentRegionId = req.query.currentRegionId ? parseInt(req.query.currentRegionId, 10) : null;
             if (Number.isNaN(productId) || Number.isNaN(currentPrice)) {
                 throw new Error('productId and currentPrice are required');
             }
-            return this.service.getProductPricesInCities(userId, productId, currentPrice);
+            return this.service.getProductPricesInCities(userId, productId, currentPrice, currentRegionId);
         });
         this.renovate = this._wrapWithUser((userId, req) => this.service.renovate(userId, req.body.element));
         this.renovateAll = this._wrapWithUser((userId) => this.service.renovateAll(userId));