Add queued FFmpeg conversion and finish splitting the window from the host.

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

tests/Explorer.Application.Tests/UiPreferencesStoreTests.cs

@@ -25,6 +25,7 @@ public class UiPreferencesStoreTests
         Assert.True(prefs.AutoClearQueueWhenDone);
         Assert.Equal(@"C:\Program Files\7-Zip\7z.exe", prefs.SevenZipPath);
         Assert.Null(prefs.GitPath);
+        Assert.Null(prefs.FfmpegPath);
     }
 
     [Fact]
@@ -43,6 +44,13 @@ public class UiPreferencesStoreTests
         Assert.Equal(@"C:\Program Files\Git\cmd\git.exe", prefs.GitPath);
     }
 
+    [Fact]
+    public void Parse_reads_ffmpeg_path()
+    {
+        var prefs = UiPreferencesStore.Parse(["ffmpeg=C:\\Tools\\ffmpeg.exe"]);
+        Assert.Equal(@"C:\Tools\ffmpeg.exe", prefs.FfmpegPath);
+    }
+
     [Fact]
     public void Parse_reads_host_and_removable_index_flags()
     {
@@ -70,6 +78,8 @@ public class UiPreferencesStoreTests
         Assert.False(prefs.BackgroundHostAtLogon);
         Assert.Null(prefs.SevenZipPath);
         Assert.Null(prefs.GitPath);
+        Assert.Null(prefs.FfmpegPath);
+        Assert.True(prefs.SessionTabs is null || prefs.SessionTabs.Count == 0);
     }
 
     [Fact]
@@ -91,6 +101,43 @@ public class UiPreferencesStoreTests
         Assert.Equal(24, prefs.WindowTop);
         Assert.True(prefs.WindowMaximized);
         Assert.Equal(320, prefs.TreeWidth);
+        Assert.True(prefs.SessionTabs is null || prefs.SessionTabs.Count == 0);
+    }
+
+    [Fact]
+    public void Parse_reads_session_tabs_and_active_index()
+    {
+        var left = @"C:\Users\Dominique\Documents";
+        var right = @"D:\Photos";
+        var prefs = UiPreferencesStore.Parse(
+        [
+            "session-active-tab=1",
+            "session-tab=" + UiPreferencesStore.FormatSessionTab(new SessionTabState(LocationRoots.ThisPc)),
+            "session-tab=" + UiPreferencesStore.FormatSessionTab(new SessionTabState(left, right, true, 0.42, true))
+        ]);
+        Assert.Equal(1, prefs.SessionActiveTab);
+        Assert.NotNull(prefs.SessionTabs);
+        Assert.Equal(2, prefs.SessionTabs.Count);
+        Assert.Equal(LocationRoots.ThisPc, prefs.SessionTabs[0].LeftPath);
+        Assert.False(prefs.SessionTabs[0].IsSplit);
+        Assert.Equal(left, prefs.SessionTabs[1].LeftPath);
+        Assert.Equal(right, prefs.SessionTabs[1].RightPath);
+        Assert.True(prefs.SessionTabs[1].IsSplit);
+        Assert.Equal(0.42, prefs.SessionTabs[1].SplitRatio);
+        Assert.True(prefs.SessionTabs[1].ActiveIsRight);
+    }
+
+    [Fact]
+    public void Session_tab_roundtrip_escapes_semicolons_in_paths()
+    {
+        var state = new SessionTabState(@"C:\weird;name", @"\\server\share", true, 0.3, false);
+        var parsed = UiPreferencesStore.TryParseSessionTab(UiPreferencesStore.FormatSessionTab(state));
+        Assert.NotNull(parsed);
+        Assert.Equal(state.LeftPath, parsed.LeftPath);
+        Assert.Equal(state.RightPath, parsed.RightPath);
+        Assert.True(parsed.IsSplit);
+        Assert.Equal(0.3, parsed.SplitRatio);
+        Assert.False(parsed.ActiveIsRight);
     }
 
     [Fact]
@@ -100,7 +147,17 @@ public class UiPreferencesStoreTests
         try
         {
             var store = new UiPreferencesStore(new PrefsEnv(dir));
-            store.Save(new UiPreferences("Light", true, false, true, AutoClearQueueWhenDone: true, WindowWidth: 1100, WindowHeight: 720, TreeWidth: 300));
+            store.Save(new UiPreferences(
+                "Light", true, false, true,
+                AutoClearQueueWhenDone: true,
+                WindowWidth: 1100,
+                WindowHeight: 720,
+                TreeWidth: 300,
+                SessionTabs:
+                [
+                    new SessionTabState(@"C:\Temp", @"D:\", true, 0.6, true)
+                ],
+                SessionActiveTab: 0));
             var loaded = store.Load();
             Assert.Equal("Light", loaded.Theme);
             Assert.True(loaded.GroupNetworkPlaces);
@@ -114,6 +171,13 @@ public class UiPreferencesStoreTests
             Assert.Equal(1100, loaded.WindowWidth);
             Assert.Equal(720, loaded.WindowHeight);
             Assert.Equal(300, loaded.TreeWidth);
+            Assert.NotNull(loaded.SessionTabs);
+            var tab = Assert.Single(loaded.SessionTabs);
+            Assert.Equal(@"C:\Temp", tab.LeftPath);
+            Assert.Equal(@"D:\", tab.RightPath);
+            Assert.True(tab.IsSplit);
+            Assert.Equal(0.6, tab.SplitRatio);
+            Assert.True(tab.ActiveIsRight);
         }
         finally
         {