Add TV bumpers functionality: introduce configuration options for bumpers in .env.example and appsettings.json, enhance ChannelEndpoints to manage jingles and bumper assets, and update Channel and ScheduleEntry models to support bumper logic. Implement validation for bumper settings and integrate bumper handling in scheduling logic.

backend/src/TeleWave.Application/Broadcast/BumperMusic/ClearBumperMusicCommandHandler.cs

@@ -0,0 +1,29 @@
+using LiteCqrs;
+using Microsoft.EntityFrameworkCore;
+using TeleWave.Application.Common.Interfaces;
+using TeleWave.Application.Common.Models;
+
+namespace TeleWave.Application.Broadcast.BumperMusic;
+
+public sealed class ClearBumperMusicCommandHandler(
+    IAppDbContext dbContext,
+    IBumperTemplateStorage storage
+) : ICommandHandler<ClearBumperMusicCommand, Result>
+{
+    public async Task<Result> Handle(
+        ClearBumperMusicCommand command,
+        CancellationToken cancellationToken
+    )
+    {
+        var channel = await dbContext.Channels.FirstOrDefaultAsync(
+            c => c.Id == command.ChannelId,
+            cancellationToken
+        );
+        if (channel is null)
+            return Result.Failure(ChannelErrors.NotFound);
+
+        channel.ClearBumperMusic();
+        storage.DeleteMusic(channel.Id);
+        return Result.Success();
+    }
+}