Add OBS group management feature and documentation

- Add group_name column to teams table for mapping teams to OBS groups
- Create API endpoints for group creation (/api/createGroup) and bulk sync (/api/syncGroups)
- Update teams UI with group status display and creation buttons
- Implement automatic group assignment when adding streams
- Add comprehensive OBS setup documentation (docs/OBS_SETUP.md)
- Fix team list spacing issue with explicit margins
- Update OBS client with group management functions
- Add database migration script for existing deployments

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lib/apiClient.ts

@@ -18,7 +18,7 @@ export async function apiCall(url: string, options: RequestInit = {}): Promise<R
   
   const headers: Record<string, string> = {
     'Content-Type': 'application/json',
-    ...options.headers,
+    ...(options.headers as Record<string, string> || {}),
   };
 
   // Add API key if available