Add Git overlay, operation tools, and virtualized preview so large folders stay responsive.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Explorer.Domain/Entities.cs

@@ -122,7 +122,11 @@ public sealed class TransferJob
     public DateTimeOffset CreatedUtc { get; set; }
     public DateTimeOffset? StartedUtc { get; set; }
     public string? Error { get; set; }
-    public IReadOnlyList<string> AdditionalSources { get; init; } = [];
+    public int RetryCount { get; set; }
+    public string? WaitReason { get; set; }
+    public int SortOrder { get; set; }
+    public bool Dismissed { get; set; }
+    public IReadOnlyList<string> AdditionalSources { get; set; } = [];
 }
 
 public sealed class FileSystemItem
@@ -143,7 +147,47 @@ public sealed class FileSystemItem
     public string? DisplayName { get; init; }
     public long? FreeSpaceBytes { get; init; }
     public long? CapacityBytes { get; init; }
+    public bool AvailableToImport { get; init; }
+    public ItemHydrationFlags Hydration { get; init; } = ItemHydrationFlags.All;
     public bool IsReparsePoint => (Attributes & AttributeFlags.ReparsePoint) != 0;
+
+    public FileSystemItem Overlay(
+        long? sizeBytes = null,
+        DateTimeOffset? createdUtc = null,
+        DateTimeOffset? modifiedUtc = null,
+        int? attributes = null,
+        long? fileId = null,
+        int? reparseTag = null,
+        long? allocatedSizeBytes = null,
+        CloudPresence? cloud = null,
+        LocationInfo? location = null,
+        SizeKnowledge? sizeKnowledge = null,
+        string? displayName = null,
+        long? freeSpaceBytes = null,
+        long? capacityBytes = null,
+        bool? availableToImport = null,
+        ItemHydrationFlags? hydration = null)
+        => new()
+        {
+            FullPath = FullPath,
+            Name = Name,
+            IsDirectory = IsDirectory,
+            SizeBytes = sizeBytes ?? SizeBytes,
+            CreatedUtc = createdUtc ?? CreatedUtc,
+            ModifiedUtc = modifiedUtc ?? ModifiedUtc,
+            Attributes = attributes ?? Attributes,
+            FileId = fileId ?? FileId,
+            ReparseTag = reparseTag ?? ReparseTag,
+            AllocatedSizeBytes = allocatedSizeBytes ?? AllocatedSizeBytes,
+            Cloud = cloud ?? Cloud,
+            Location = location ?? Location,
+            SizeKnowledge = sizeKnowledge ?? SizeKnowledge,
+            DisplayName = displayName ?? DisplayName,
+            FreeSpaceBytes = freeSpaceBytes ?? FreeSpaceBytes,
+            CapacityBytes = capacityBytes ?? CapacityBytes,
+            AvailableToImport = availableToImport ?? AvailableToImport,
+            Hydration = hydration ?? Hydration
+        };
 }
 
 public sealed record CloudPresence(
@@ -173,3 +217,13 @@ public sealed class FolderListing
     public IReadOnlyList<FileSystemItem> Items { get; init; } = [];
     public string? Error { get; init; }
 }
+
+public sealed class FileRelation
+{
+    public long Id { get; set; }
+    public long LeftEntryId { get; init; }
+    public long RightEntryId { get; init; }
+    public FileRelationKind Kind { get; init; }
+    public FileRelationOrigin Origin { get; init; } = FileRelationOrigin.User;
+    public DateTimeOffset CreatedUtc { get; init; }
+}