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.Infrastructure/Media/MediaPathResolver.cs

@@ -17,6 +17,7 @@ public sealed class MediaPathResolver
         UploadsDir = Path.Combine(_root, "uploads");
         OriginalsDir = Path.Combine(_root, "originals");
         AssetsDir = Path.Combine(_root, "assets");
+        BumpersDir = Path.Combine(_root, "bumpers");
     }
 
     public string InboxDir { get; }
@@ -24,14 +25,25 @@ public sealed class MediaPathResolver
     public string OriginalsDir { get; }
     public string AssetsDir { get; }
 
+    /// <summary>Сырые файлы шаблонов заставок (фон/музыка) по каналам — не режутся на HLS.</summary>
+    public string BumpersDir { get; }
+
     public void EnsureDirectories()
     {
         Directory.CreateDirectory(InboxDir);
         Directory.CreateDirectory(UploadsDir);
         Directory.CreateDirectory(OriginalsDir);
         Directory.CreateDirectory(AssetsDir);
+        Directory.CreateDirectory(BumpersDir);
     }
 
+    public string BumperChannelDir(Guid channelId) =>
+        EnsureWithinRoot(Path.Combine(BumpersDir, channelId.ToString("N")));
+
+    /// <summary>Путь к файлу шаблона заставки (kind — «background»/«music», extension — с точкой).</summary>
+    public string BumperFilePath(Guid channelId, string kind, string extension) =>
+        EnsureWithinRoot(Path.Combine(BumpersDir, channelId.ToString("N"), kind + extension));
+
     public string OriginalPath(Guid assetId, string extension) =>
         EnsureWithinRoot(Path.Combine(OriginalsDir, assetId.ToString("N") + extension));