test(admin-panel): add product context to AI trace warnings

- Added `productName` field to `AdminAiWarning` in test data
- Updated warning test cases to include product context for better traceability

flutter/test/features/admin/presentation/admin_ai_panel_test.dart

@@ -95,6 +95,7 @@ void main() {
           severity: 'warning',
           location: 'Steg: AI-parser',
           itemIndex: 5,
+          productName: 'Test Product',
         ),
       AdminAiWarning(
         code: 'no_match',
@@ -105,6 +106,7 @@ void main() {
         severity: 'warning',
         location: 'Steg: matchning mot dina produkter',
         itemIndex: 7,
+        productName: 'Another Test Product',
       ),
     ],
     legacyWarnings: const ['parse:low_confidence', 'match:no_match'],