Fix frontend compatibility with new API response format

Frontend Updates:
- Handle both old and new API response formats for backward compatibility
- Updated Teams, Streams, and Edit Stream pages to parse new response structure
- Added graceful handling of { success: true, data: [...] } format
- Maintained support for legacy direct array responses

Bug Fix:
- Resolved TypeError: teamsData.map is not a function
- Ensures smooth transition as we update API endpoints
- Prevents breaking changes during API modernization

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

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

app/teams/page.tsx

@@ -26,7 +26,9 @@ export default function Teams() {
     try {
       const res = await fetch('/api/teams');
       const data = await res.json();
-      setTeams(data);
+      // Handle both old and new API response formats
+      const teams = data.success ? data.data : data;
+      setTeams(teams);
     } catch (error) {
       console.error('Error fetching teams:', error);
     } finally {