test(cli): enhance realistic VSCode fixture with block comments and trailing commas

Author: RbBtSn0w

tests/test_merge.py

@@ -55,18 +55,18 @@ def test_merge_json_files_empty_existing(tmp_path):
 # --- Dimension 3: Real-world Simulation ---
 
 def test_merge_vscode_realistic_scenario(tmp_path):
-    """A realistic VSCode settings.json with many existing preferences."""
+    """A realistic VSCode settings.json with many existing preferences, comments, and trailing commas."""
     existing_file = tmp_path / "vscode_settings.json"
     existing_file.write_text("""
     {
         "editor.fontSize": 12,
-        "editor.formatOnSave": true,
+        "editor.formatOnSave": true, /* block comment */
         "files.exclude": {
             "**/.git": true,
-            "**/node_modules": true
+            "**/node_modules": true,
         },
         "chat.promptFilesRecommendations": {
-            "existing.tool": true
+            "existing.tool": true,
         } // User comment
     }
     """)