Add image management functionality: introduce Image entity and related API endpoints, update database schema to support image storage, and enhance UI with a new gallery feature for image selection and upload. Update translations for gallery-related terms.

backend/src/TeleWave.Infrastructure/Media/MediaPathResolver.cs

@@ -19,6 +19,7 @@ public sealed class MediaPathResolver
         AssetsDir = Path.Combine(_root, "assets");
         BumpersDir = Path.Combine(_root, "bumpers");
         MetadataDir = Path.Combine(_root, "metadata");
+        ImagesDir = Path.Combine(_root, "images");
     }
 
     public string InboxDir { get; }
@@ -32,6 +33,9 @@ public sealed class MediaPathResolver
     /// <summary>Картинки метаданных (постеры/кадры), скачанные локально.</summary>
     public string MetadataDir { get; }
 
+    /// <summary>Общий реестр изображений (галерея): файлы images/{imageId}{ext}.</summary>
+    public string ImagesDir { get; }
+
     public void EnsureDirectories()
     {
         Directory.CreateDirectory(InboxDir);
@@ -40,6 +44,7 @@ public sealed class MediaPathResolver
         Directory.CreateDirectory(AssetsDir);
         Directory.CreateDirectory(BumpersDir);
         Directory.CreateDirectory(MetadataDir);
+        Directory.CreateDirectory(ImagesDir);
     }
 
     public string MetadataShowDir(Guid showId) =>
@@ -86,6 +91,10 @@ public sealed class MediaPathResolver
     public string BumperTemplateFilePath(Guid templateId, string kind, string extension) =>
         EnsureWithinRoot(Path.Combine(BumpersDir, templateId.ToString("N"), kind + extension));
 
+    /// <summary>Путь к файлу изображения общего реестра (extension — с точкой).</summary>
+    public string ImagePath(Guid imageId, string extension) =>
+        EnsureWithinRoot(Path.Combine(ImagesDir, imageId.ToString("N") + extension));
+
     public string OriginalPath(Guid assetId, string extension) =>
         EnsureWithinRoot(Path.Combine(OriginalsDir, assetId.ToString("N") + extension));