app/lib/features/catalog/data/catalog_failure_mapper.dart

@@ -5,6 +5,8 @@ import 'package:shuffle/core/platform/io_error.dart';
 import 'package:shuffle/features/catalog/domain/catalog_failure.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
 
+const _invalidInputCodes = {'P0001', '22003', '22P02'};
+
 /// Translates exceptions of `supabase_flutter` into a [CatalogFailure]
 /// (Spec #3 § 5.2).
 CatalogFailure mapCatalogError(Object error) {
@@ -13,7 +15,9 @@ CatalogFailure mapCatalogError(Object error) {
       isIoNetworkError(error)) {
     return const CatalogFailure.network();
   }
-  if (error is PostgrestException && error.code == 'P0001') {
+  // P0001: RPC input checks; 22003: number out of range (smallint cast);
+  // 22P02: invalid text representation. None gets better by repeating.
+  if (error is PostgrestException && _invalidInputCodes.contains(error.code)) {
     return const CatalogFailure.invalidInput();
   }
   return const CatalogFailure.unexpected();

app/test/features/catalog/domain/catalog_domain_test.dart

@@ -182,6 +182,13 @@ void main() {
         ),
         isA<CatalogInvalidInputFailure>(),
       );
+      for (final code in ['22003', '22P02']) {
+        expect(
+          mapCatalogError(PostgrestException(message: 'x', code: code)),
+          isA<CatalogInvalidInputFailure>(),
+          reason: code,
+        );
+      }
       expect(
         mapCatalogError(const PostgrestException(message: 'x', code: '42501')),
         isA<CatalogUnexpectedFailure>(),