Enhance schedule and show management: add season and episode information to ScheduleEntryDto, update ListShowsQueryHandler to include season counts, and modify frontend components to display this new data. Improve EPG handling by consolidating program entries into blocks for better clarity in the streaming interface.

backend/src/TeleWave.Application/Library/EpisodeName.cs

@@ -0,0 +1,40 @@
+using System.Globalization;
+using System.Text.RegularExpressions;
+
+namespace TeleWave.Application.Library;
+
+/// <summary>Разбор сезона/серии из имени файла (SxxEyy либо NxNN). Номера в модели не хранятся —
+/// вытаскиваются из имён по мере надобности (сводка в списке шоу, метка в расписании админки).</summary>
+public static class EpisodeName
+{
+    private static readonly Regex SxxEyy = new(
+        @"[Ss](\d{1,2})[ ._-]*[Ee](\d{1,3})",
+        RegexOptions.Compiled
+    );
+
+    private static readonly Regex NxNN = new(
+        @"(?:^|[^\d])(\d{1,2})x(\d{1,3})",
+        RegexOptions.Compiled | RegexOptions.IgnoreCase
+    );
+
+    public static (int Season, int Episode)? Parse(string? name)
+    {
+        if (string.IsNullOrEmpty(name))
+            return null;
+
+        var match = SxxEyy.Match(name);
+        if (!match.Success)
+            match = NxNN.Match(name);
+
+        return match.Success
+            ? (int.Parse(match.Groups[1].Value, CultureInfo.InvariantCulture),
+                int.Parse(match.Groups[2].Value, CultureInfo.InvariantCulture))
+            : null;
+    }
+
+    public static int? ParseSeason(string? name) => Parse(name)?.Season;
+
+    /// <summary>Метка вида «S16E03», либо null если распознать не удалось.</summary>
+    public static string? ParseLabel(string? name) =>
+        Parse(name) is { } p ? $"S{p.Season:D2}E{p.Episode:D2}" : null;
+}