Add patterned rename and Move to, and keep settings, selection, and queue speed from resetting.

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

tests/Explorer.Application.Tests/FilenamePatternsTests.cs

@@ -0,0 +1,23 @@
+using Explorer.Application;
+
+namespace Explorer.Application.Tests;
+
+public class FilenamePatternsTests
+{
+    [Fact]
+    public void Combine_lists_built_in_then_saved()
+    {
+        var combined = FilenamePatterns.Combine(["{Album} - {Title}", "{Artist} - {Title}"]);
+        Assert.Equal(FilenamePatterns.BuiltIn[0], combined[0]);
+        Assert.Contains("{Album} - {Title}", combined);
+        Assert.Equal(1, combined.Count(p => p.Equals("{Artist} - {Title}", StringComparison.OrdinalIgnoreCase)));
+    }
+
+    [Fact]
+    public void Add_puts_the_new_pattern_first_and_drops_built_ins_from_saved()
+    {
+        var saved = FilenamePatterns.Add(null, "{Album} - {Title}");
+        Assert.Equal(["{Album} - {Title}"], saved);
+        Assert.Empty(FilenamePatterns.Normalize(["{Artist} - {Title}", "  "]));
+    }
+}