Refactor ChannelEndpoints and ScheduleGenerator: consolidate endpoint logic into partial files, remove unused methods, and enhance dependency injection for scheduling. Update ChannelDetail component to streamline imports and improve UI structure.

backend/src/TeleWave.Infrastructure/DependencyInjection.cs

@@ -126,6 +126,7 @@ public static class DependencyInjection
         services.AddSingleton<IRandomSource, SystemRandomSource>();
         services.AddSingleton<StreamTokenService>();
         services.AddSingleton<IBumperRenderer, FfmpegBumperRenderer>();
+        services.AddScoped<ScheduleBumperResolver>();
         services.AddScoped<ScheduleGenerator>();
         services.AddHostedService<SchedulingBackgroundService>();
     }