fix(extensions): restore missing owned resources

scripts/lib/managed-extensions.py

@@ -402,6 +402,7 @@ class Manager:
             raise ValueError('Invalid MCPorter server definition.')
         record = next((r for r in self.state['resources'] if r['client'] == 'shared' and r['name'] == entry['name']), None)
         config_path = safe_path(self.home, '.mcporter/mcporter.json')
+        existing = None
         if config_path.exists():
             config = json.loads(config_path.read_text(encoding='utf-8'))
             if not isinstance(config, dict) or not isinstance(config.get('mcpServers', {}), dict):
@@ -415,7 +416,7 @@ class Manager:
                 return
             if existing is not None and record is not None and existing.get('baseUrl') != record['url']:
                 raise ValueError('Owned MCPorter server changed locally; refusing to overwrite it.')
-        if record is not None and not self.update:
+        if record is not None and existing is not None and not self.update:
             return
         self.command(['mcporter', '--config', str(self.home / '.mcporter/mcporter.json'), 'config', 'add', server, url])
         if record is None: