HOTFIX: not allowing empty price when expert tries to submit

src/common/validators/repair-line-amount-toman.validator.ts

@@ -25,7 +25,12 @@ export class IsRepairLineAmountTomanConstraint
       number,
       boolean | undefined,
     ];
-    if (value == null || value === "") return true;
+    // Optional fields are skipped by @IsOptional. A required amount must not
+    // accept an omitted or blank value, otherwise an empty expert pricing line
+    // can be submitted as a zero-cost repair.
+    if (value == null || (typeof value === "string" && value.trim() === "")) {
+      return false;
+    }
     const amount = parseMoneyAmountToman(value);
     if (amount == null) return false;
     if (allowZero && amount === 0) return true;