Remove backwards compatibility for API responses

- Clean up all backward compatibility checks for old API format
- All endpoints now consistently return { success: true, data: [...] }
- Simplify response handling across all components and pages

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

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

app/page.tsx

@@ -80,12 +80,8 @@ export default function Home() {
         activeRes.json()
       ]);
       
-      // Handle both old and new API response formats
-      const streams = streamsData.success ? streamsData.data : streamsData;
-      const activeSources = activeData.success ? activeData.data : activeData;
-      
-      setStreams(streams);
-      setActiveSources(activeSources);
+      setStreams(streamsData.data);
+      setActiveSources(activeData);
     } catch (error) {
       console.error('Error fetching data:', error);
       showError('Failed to Load Data', 'Could not fetch streams. Please refresh the page.');