Add maintenance management features: implement maintenance endpoints in the API, enhance media upload handling to skip duplicate files, and update frontend routes and translations for maintenance operations.

backend/src/TeleWave.Application/Maintenance/ClearAllMedia/ClearAllMediaCommand.cs

@@ -0,0 +1,7 @@
+using LiteCqrs;
+using TeleWave.Application.Common.Models;
+
+namespace TeleWave.Application.Maintenance.ClearAllMedia;
+
+/// <summary>Удаляет ВСЕ медиа-ассеты (строки + файлы) и связанное расписание. Опасная операция.</summary>
+public sealed record ClearAllMediaCommand : ICommand<Result<int>>;

backend/src/TeleWave.Application/Maintenance/ClearAllMedia/ClearAllMediaCommandHandler.cs

@@ -0,0 +1,29 @@
+using LiteCqrs;
+using Microsoft.EntityFrameworkCore;
+using TeleWave.Application.Common.Interfaces;
+using TeleWave.Application.Common.Models;
+
+namespace TeleWave.Application.Maintenance.ClearAllMedia;
+
+public sealed class ClearAllMediaCommandHandler(IAppDbContext dbContext, IMediaStorage storage)
+    : ICommandHandler<ClearAllMediaCommand, Result<int>>
+{
+    public async Task<Result<int>> Handle(
+        ClearAllMediaCommand command,
+        CancellationToken cancellationToken
+    )
+    {
+        var assets = await dbContext.MediaAssets
+            .Select(a => new { a.Id, a.OriginalExtension })
+            .ToListAsync(cancellationToken);
+
+        foreach (var asset in assets)
+            storage.DeleteAssetArtifacts(asset.Id, asset.OriginalExtension);
+
+        // Расписание ссылается на удаляемые ассеты — чистим его тоже.
+        await dbContext.ScheduleEntries.ExecuteDeleteAsync(cancellationToken);
+        var deleted = await dbContext.MediaAssets.ExecuteDeleteAsync(cancellationToken);
+
+        return Result.Success(deleted);
+    }
+}

backend/src/TeleWave.Application/Maintenance/DeleteAllShows/DeleteAllShowsCommand.cs

@@ -0,0 +1,7 @@
+using LiteCqrs;
+using TeleWave.Application.Common.Models;
+
+namespace TeleWave.Application.Maintenance.DeleteAllShows;
+
+/// <summary>Удаляет ВСЕ шоу (с сериями через каскад). Медиа-ассеты остаются в библиотеке.</summary>
+public sealed record DeleteAllShowsCommand : ICommand<Result<int>>;

backend/src/TeleWave.Application/Maintenance/DeleteAllShows/DeleteAllShowsCommandHandler.cs

@@ -0,0 +1,20 @@
+using LiteCqrs;
+using Microsoft.EntityFrameworkCore;
+using TeleWave.Application.Common.Interfaces;
+using TeleWave.Application.Common.Models;
+
+namespace TeleWave.Application.Maintenance.DeleteAllShows;
+
+public sealed class DeleteAllShowsCommandHandler(IAppDbContext dbContext)
+    : ICommandHandler<DeleteAllShowsCommand, Result<int>>
+{
+    public async Task<Result<int>> Handle(
+        DeleteAllShowsCommand command,
+        CancellationToken cancellationToken
+    )
+    {
+        // Серии удаляются каскадом (FK Show → ShowEpisode: OnDelete Cascade).
+        var deleted = await dbContext.Shows.ExecuteDeleteAsync(cancellationToken);
+        return Result.Success(deleted);
+    }
+}

backend/src/TeleWave.Application/Maintenance/DeleteShowMedia/DeleteShowMediaCommand.cs

@@ -0,0 +1,7 @@
+using LiteCqrs;
+using TeleWave.Application.Common.Models;
+
+namespace TeleWave.Application.Maintenance.DeleteShowMedia;
+
+/// <summary>Удаляет медиа-ассеты (файлы + строки) всех серий указанного шоу и очищает его серии.</summary>
+public sealed record DeleteShowMediaCommand(Guid ShowId) : ICommand<Result<int>>;

backend/src/TeleWave.Application/Maintenance/DeleteShowMedia/DeleteShowMediaCommandHandler.cs

@@ -0,0 +1,47 @@
+using LiteCqrs;
+using Microsoft.EntityFrameworkCore;
+using TeleWave.Application.Common.Interfaces;
+using TeleWave.Application.Common.Models;
+using TeleWave.Application.Library;
+
+namespace TeleWave.Application.Maintenance.DeleteShowMedia;
+
+public sealed class DeleteShowMediaCommandHandler(IAppDbContext dbContext, IMediaStorage storage)
+    : ICommandHandler<DeleteShowMediaCommand, Result<int>>
+{
+    public async Task<Result<int>> Handle(
+        DeleteShowMediaCommand command,
+        CancellationToken cancellationToken
+    )
+    {
+        var show = await dbContext.Shows
+            .Include(s => s.Episodes)
+            .FirstOrDefaultAsync(s => s.Id == command.ShowId, cancellationToken);
+        if (show is null)
+            return Result.Failure<int>(ShowErrors.NotFound);
+
+        var episodes = show.Episodes.ToList();
+        var assetIds = episodes.Select(e => e.MediaAssetId).Distinct().ToList();
+
+        var assets = await dbContext.MediaAssets
+            .Where(a => assetIds.Contains(a.Id))
+            .Select(a => new { a.Id, a.OriginalExtension })
+            .ToListAsync(cancellationToken);
+
+        foreach (var asset in assets)
+            storage.DeleteAssetArtifacts(asset.Id, asset.OriginalExtension);
+
+        await dbContext.ScheduleEntries
+            .Where(e => assetIds.Contains(e.MediaAssetId))
+            .ExecuteDeleteAsync(cancellationToken);
+        await dbContext.MediaAssets
+            .Where(a => assetIds.Contains(a.Id))
+            .ExecuteDeleteAsync(cancellationToken);
+
+        // Серии шоу теперь указывают на удалённые ассеты — убираем их (сохранится через UnitOfWork).
+        foreach (var episode in episodes)
+            show.RemoveEpisode(episode.Id);
+
+        return Result.Success(assets.Count);
+    }
+}

backend/src/TeleWave.Application/Media/MediaErrors.cs

@@ -33,4 +33,9 @@ public static class MediaErrors
         "Media.SourceNotFound",
         "Исходный файл не найден в хранилище."
     );
+
+    public static readonly Error DuplicateFileName = Error.Conflict(
+        "Media.DuplicateFileName",
+        "Файл с таким именем уже загружен."
+    );
 }

backend/src/TeleWave.Application/Media/Register/RegisterMediaAssetCommandHandler.cs

@@ -1,4 +1,5 @@
 using LiteCqrs;
+using Microsoft.EntityFrameworkCore;
 using TeleWave.Application.Common.Interfaces;
 using TeleWave.Application.Common.Models;
 using TeleWave.Domain.Media;
@@ -15,6 +16,16 @@ public sealed class RegisterMediaAssetCommandHandler(
         CancellationToken cancellationToken
     )
     {
+        // Дедуп по имени: тот же файл уже в библиотеке (кроме проваленных — их разрешаем перезалить).
+        var duplicate = await dbContext.MediaAssets.AnyAsync(
+            x =>
+                x.OriginalFileName == command.OriginalFileName
+                && x.Status != MediaAssetStatus.Failed,
+            cancellationToken
+        );
+        if (duplicate)
+            return Result.Failure<Guid>(MediaErrors.DuplicateFileName);
+
         var extension = Path.GetExtension(command.OriginalFileName).ToLowerInvariant();
         var asset = MediaAsset.Register(command.OriginalFileName, extension, command.Source);