Show folder names immediately and refresh stale index sizes without walking the whole drive.

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

tests/Explorer.Application.Tests/UiPreferencesStoreTests.cs

@@ -57,10 +57,12 @@ public class UiPreferencesStoreTests
         var prefs = UiPreferencesStore.Parse(
         [
             "auto-index-removable=true",
-            "background-host-at-logon=true"
+            "background-host-at-logon=true",
+            "prefer-favorites-in-tree=true"
         ]);
         Assert.True(prefs.AutoIndexRemovable);
         Assert.True(prefs.BackgroundHostAtLogon);
+        Assert.True(prefs.PreferFavoritesInTree);
     }
 
     [Fact]
@@ -76,10 +78,32 @@ public class UiPreferencesStoreTests
         Assert.False(prefs.AutoClearQueueWhenDone);
         Assert.False(prefs.AutoIndexRemovable);
         Assert.False(prefs.BackgroundHostAtLogon);
+        Assert.False(prefs.PreferFavoritesInTree);
+        Assert.True(prefs.BackgroundMaintenanceWhenIdle);
+        Assert.Equal(10, prefs.IdleMaintenanceMinutes);
+        Assert.True(prefs.IdleMaintenanceAcOnly);
         Assert.Null(prefs.SevenZipPath);
         Assert.Null(prefs.GitPath);
         Assert.Null(prefs.FfmpegPath);
         Assert.True(prefs.SessionTabs is null || prefs.SessionTabs.Count == 0);
+        Assert.True(prefs.FavoriteFolders is null || prefs.FavoriteFolders.Count == 0);
+    }
+
+    [Fact]
+    public void Parse_idle_maintenance_keys()
+    {
+        var prefs = UiPreferencesStore.Parse(
+        [
+            "background-maintenance-when-idle=false",
+            "idle-maintenance-minutes=30",
+            "idle-maintenance-ac-only=false"
+        ]);
+        Assert.False(prefs.BackgroundMaintenanceWhenIdle);
+        Assert.Equal(30, prefs.IdleMaintenanceMinutes);
+        Assert.False(prefs.IdleMaintenanceAcOnly);
+        Assert.Equal(5, UiPreferencesStore.NormalizeIdleMinutes(4));
+        Assert.Equal(10, UiPreferencesStore.NormalizeIdleMinutes(10));
+        Assert.Equal(30, UiPreferencesStore.NormalizeIdleMinutes(90));
     }
 
     [Fact]
@@ -127,6 +151,22 @@ public class UiPreferencesStoreTests
         Assert.True(prefs.SessionTabs[1].ActiveIsRight);
     }
 
+    [Fact]
+    public void Parse_reads_favorite_folders_and_skips_virtual_roots()
+    {
+        var prefs = UiPreferencesStore.Parse(
+        [
+            "favorite=D:\\Photos",
+            "favorite=D:\\Photos",
+            "favorite=This PC",
+            "favorite=C:\\Users\\Dominique\\Documents"
+        ]);
+        Assert.NotNull(prefs.FavoriteFolders);
+        Assert.Equal(2, prefs.FavoriteFolders.Count);
+        Assert.Equal(@"D:\Photos", prefs.FavoriteFolders[0]);
+        Assert.Equal(@"C:\Users\Dominique\Documents", prefs.FavoriteFolders[1]);
+    }
+
     [Fact]
     public void Session_tab_roundtrip_escapes_semicolons_in_paths()
     {
@@ -153,11 +193,13 @@ public class UiPreferencesStoreTests
                 WindowWidth: 1100,
                 WindowHeight: 720,
                 TreeWidth: 300,
+                FavoriteFolders: [@"D:\Photos", @"C:\Users\Dominique\Documents"],
                 SessionTabs:
                 [
                     new SessionTabState(@"C:\Temp", @"D:\", true, 0.6, true)
                 ],
-                SessionActiveTab: 0));
+                SessionActiveTab: 0,
+                PreferFavoritesInTree: true));
             var loaded = store.Load();
             Assert.Equal("Light", loaded.Theme);
             Assert.True(loaded.GroupNetworkPlaces);
@@ -168,9 +210,14 @@ public class UiPreferencesStoreTests
             Assert.True(loaded.AutoClearQueueWhenDone);
             Assert.False(loaded.AutoIndexRemovable);
             Assert.False(loaded.BackgroundHostAtLogon);
+            Assert.True(loaded.PreferFavoritesInTree);
+            Assert.True(loaded.BackgroundMaintenanceWhenIdle);
+            Assert.Equal(10, loaded.IdleMaintenanceMinutes);
+            Assert.True(loaded.IdleMaintenanceAcOnly);
             Assert.Equal(1100, loaded.WindowWidth);
             Assert.Equal(720, loaded.WindowHeight);
             Assert.Equal(300, loaded.TreeWidth);
+            Assert.Equal([@"D:\Photos", @"C:\Users\Dominique\Documents"], loaded.FavoriteFolders);
             Assert.NotNull(loaded.SessionTabs);
             var tab = Assert.Single(loaded.SessionTabs);
             Assert.Equal(@"C:\Temp", tab.LeftPath);