Enhance gift sending logic: Implement retry mechanism for 'tooOften' error in FalukantService and update error handling in FamilyView to display retry time.

backend/controllers/falukantController.js

@@ -99,7 +99,16 @@ class FalukantController {
             return this.service.getGifts(userId);
         });
         this.getChildren = this._wrapWithUser((userId) => this.service.getChildren(userId));
-        this.sendGift = this._wrapWithUser((userId, req) => this.service.sendGift(userId, req.body.giftId));
+        this.sendGift = this._wrapWithUser(async (userId, req) => {
+            try {
+                return await this.service.sendGift(userId, req.body.giftId);
+            } catch (e) {
+                if (e && e.name === 'PreconditionError' && e.message === 'tooOften') {
+                    throw { status: 412, message: 'tooOften', retryAt: e.meta?.retryAt };
+                }
+                throw e;
+            }
+        });
 
         this.getTitlesOfNobility = this._wrapWithUser((userId) => this.service.getTitlesOfNobility(userId));
         this.getHouseTypes = this._wrapWithUser((userId) => this.service.getHouseTypes(userId));

backend/services/falukantService.js

@@ -2868,7 +2868,10 @@ class FalukantService extends BaseService {
             limit: 1
         });
         if (lastGift && (lastGift.createdAt.getTime() + 3_600_000) > Date.now()) {
-            throw new PreconditionError('tooOften');
+            const retryAt = new Date(lastGift.createdAt.getTime() + 3_600_000);
+            const err = new PreconditionError('tooOften');
+            err.meta = { retryAt: retryAt.toISOString() };
+            throw err;
         }
         const gift = await PromotionalGift.findOne({
             where: { id: giftId },