feat: Auto-fix cost_credits <= 0 to 3 on every furniture import

- Extended fixDatabaseConsistencyAfterImport() to also set cost_credits = 3 where <= 0
- Integrated into both single and batch import routes
- API responses now include costCreditsFixed count

Ensures 100% of catalog_items have cost_credits > 0 after import
- Typecheck, lint, tests all pass
- Pushed to GitLab

src/app/api/admin/import/furni/batch/route.ts

@@ -266,8 +266,9 @@ export const POST = withAdmin(
 					);
 				}
 
-				// Fix database consistency (catalog_name + have_offer) after import
-				const dbFix = await fixDatabaseConsistencyAfterImport();
+				// Fix database consistency (catalog_name + have_offer + cost_credits) after import
+				const { catalogNameFixed, haveOfferFixed, costCreditsFixed } =
+					await fixDatabaseConsistencyAfterImport();
 
 				send({
 					type: "batch_complete",
@@ -285,8 +286,9 @@ export const POST = withAdmin(
 					offerRebuildFixed,
 					spriteFixed,
 					interactionFixed,
-					catalogNameFixed: dbFix.catalogNameFixed,
-					haveOfferFixed: dbFix.haveOfferFixed,
+					catalogNameFixed,
+					haveOfferFixed,
+					costCreditsFixed,
 					languages,
 					duration: Date.now() - startTime,
 				});