🔄 Update test data structure in useGamemasterFiles to use objects instead of plain text for large file simulation

code/websites/pokedex.online/tests/unit/composables/useGamemasterFiles.test.js

@@ -376,9 +376,11 @@ describe('useGamemasterFiles', () => {
 
   describe('expandDisplayLinesToInclude', () => {
     beforeEach(async () => {
-      // Create large file with many lines
-      const largeContent = Array(20000).fill('test line').join('\n');
-      mockClient.getPokemon.mockResolvedValueOnce(largeContent);
+      // Create large file with many items that will create many lines
+      const largeData = {
+        items: Array(15000).fill({ id: 1, data: 'test' })
+      };
+      mockClient.getPokemon.mockResolvedValueOnce(largeData);
       composable.selectedFile.value = 'pokemon';
       await composable.loadFile();
     });