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/lib/services/furni-import.ts

@@ -1089,10 +1089,12 @@ async function realNitroModes(classname: string): Promise<number | undefined> {
 /** Fix database consistency after import:
  *  1. Fill empty catalog_name from items_base.public_name
  *  2. Set have_offer = '1' where it was '0'
- * Returns { catalogNameFixed, haveOfferFixed } with counts. */
+ *  3. Set cost_credits = 3 where it was <= 0
+ * Returns { catalogNameFixed, haveOfferFixed, costCreditsFixed } with counts. */
 export async function fixDatabaseConsistencyAfterImport(): Promise<{
 	catalogNameFixed: number;
 	haveOfferFixed: number;
+	costCreditsFixed: number;
 }> {
 	// 1. Fill empty catalog_name from items_base.public_name
 	const [nameResult] = (await db.execute(sql`
@@ -1114,7 +1116,15 @@ export async function fixDatabaseConsistencyAfterImport(): Promise<{
   `)) as unknown as [Record<string, unknown>, unknown];
 	const haveOfferFixed = Number(offerResult.affectedRows ?? 0);
 
-	return { catalogNameFixed, haveOfferFixed };
+	// 3. Set cost_credits = 3 where it was <= 0
+	const [creditResult] = (await db.execute(sql`
+    UPDATE catalog_items
+    SET cost_credits = 3
+    WHERE cost_credits <= 0
+  `)) as unknown as [Record<string, unknown>, unknown];
+	const costCreditsFixed = Number(creditResult.affectedRows ?? 0);
+
+	return { catalogNameFixed, haveOfferFixed, costCreditsFixed };
 }
 
 /** Verify and fix interaction values for ALL furniture in items_base.