Add collections, videos, images to shareable items

Jellyfin.Plugin.ShareLinks/Api/ShareLinksController.cs

@@ -227,7 +227,7 @@ public sealed class ShareLinksController : ControllerBase
                 itemId,
                 item.Name,
                 item.GetType().Name);
-            return BadRequest(new { error = "Only a movie, series, season or episode can be shared. Open the title's page and try again." });
+            return BadRequest(new { error = "Only a video, image, and collection can be shared. Open the title's page and try again." });
         }
 
         try
@@ -526,16 +526,18 @@ setTimeout(function () { window.location.replace({{redirectUrlJson}}); }, 4000);
     }
 
     /// <summary>
-    /// Only real video titles are shareable. Anything else - a person, studio,
-    /// genre, library, collection, playlist, music track or book - would either
-    /// give the guest nothing to play or pull unrelated items into the guest's tag
-    /// policy, so the API refuses it even when a client asks for it.
+    /// Real video titles, home videos, photos and collections are shareable.
+    /// Anything else - a person, studio, genre, library, playlist, music track or
+    /// book - would either give the guest nothing to play or pull unrelated items
+    /// into the guest's tag policy, so the API refuses it even when a client asks
+    /// for it. A BoxSet shares every item beneath it in one link: ItemTagService
+    /// tags the whole tree, same as it does for a series' seasons and episodes.
     /// </summary>
     private static bool IsShareableItem(BaseItem item)
     {
-        return item is Movie or Series or Season or Episode;
+        return item is Movie or Series or Season or Episode or Video or BoxSet or Photo;
     }
-
+    
     private static bool IsExpired(ShareLinkRecord record)
     {
         return record.ExpiresAtUtc <= DateTimeOffset.UtcNow;