feat: add BatchEdit page and extract reusable batch sub-components from BatchUpload

fix: TrackNumber sort case, stale _imagePath reset, skip Done rows on retry in BatchEdit

DeepDrftManager/Components/Pages/Tracks/BatchRowModel.cs

@@ -0,0 +1,32 @@
+using Microsoft.AspNetCore.Components.Forms;
+
+namespace DeepDrftManager.Components.Pages.Tracks;
+
+/// <summary>
+/// A single track row shared by <c>BatchUpload</c> (all rows are new uploads) and
+/// <c>BatchEdit</c> (existing rows carry <see cref="Id"/>; admins may also add new upload rows).
+/// </summary>
+public class BatchRowModel
+{
+    /// <summary>SQL id of an existing track. <c>null</c> means a new row to upload.</summary>
+    public long? Id { get; set; }
+
+    /// <summary>Vault entry key — existing rows only.</summary>
+    public string? EntryKey { get; set; }
+
+    /// <summary>Original upload filename — existing rows only, read-only display.</summary>
+    public string? OriginalFileName { get; set; }
+
+    /// <summary>Selected WAV — new rows only.</summary>
+    public IBrowserFile? WavFile { get; set; }
+
+    public string TrackName { get; set; } = string.Empty;
+
+    public int TrackNumber { get; set; }
+
+    public BatchRowStatus Status { get; set; } = BatchRowStatus.Queued;
+
+    public string? ErrorMessage { get; set; }
+}
+
+public enum BatchRowStatus { Queued, Uploading, Done, Failed }