fix(falukant): improve product pricing logic and update localization for office notifications

- Refactored the product pricing logic in `falukantService.js` to ensure accurate regional pricing calculations based on client values and server data.
- Added new notification translations for "office filled" in multiple languages (Cebuano, German, English, Spanish, French) to enhance user experience and clarity in notifications.

backend/services/falukantService.js

@@ -7036,13 +7036,15 @@ ORDER BY r.id`,
                 ? Number(clientPriceRaw)
                 : NaN;
             let currentRegionalPrice;
-            if (!Number.isNaN(clientPriceNum)) {
-                // Referenzpreis wie in der Ertrags-Tabelle (z. B. MAX-Worth über Filialen)
-                currentRegionalPrice = clientPriceNum;
-            } else if (currentRegionId) {
+            // Wie getProductPricesInCities: bei bekannter Standort-Region immer
+            // serverseitigen Verkaufspreis dieser Region als Referenz — nicht den
+            // Client-Wert (Ertrags-Tabelle kann MAX-Worth über Filialen nutzen).
+            if (currentRegionId) {
                 const wp = worthByProductRegion.get(`${product.id}-${currentRegionId}`) ?? 50;
                 currentRegionalPrice = calcRegionalSellPriceSync(product, knowledgeFactor, wp)
-                    ?? Number(product.sellCost) ?? 0;
+                    ?? (!Number.isNaN(clientPriceNum) ? clientPriceNum : Number(product.sellCost) ?? 0);
+            } else if (!Number.isNaN(clientPriceNum)) {
+                currentRegionalPrice = clientPriceNum;
             } else {
                 currentRegionalPrice = Number(product.sellCost) || 0;
             }