refactor(ui): Material icons for list, folder and smart-list icon keys with legacy mapping

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tests/ClaudeDo.Ui.Tests/ViewModels/ListSettingsModalViewModelTests.cs

@@ -1,6 +1,8 @@
 using ClaudeDo.Data;
 using ClaudeDo.Localization;
+using ClaudeDo.Ui.Converters;
 using ClaudeDo.Ui.Localization;
+using Material.Icons;
 using ClaudeDo.Ui.ViewModels.Modals;
 using Microsoft.EntityFrameworkCore;
 
@@ -88,7 +90,7 @@ public class ListSettingsModalViewModelTests
 
         vm.IconSearch = "rocket";
         Assert.Contains("mdi:RocketLaunch", vm.Icons);
-        Assert.DoesNotContain("Star", vm.Icons);
+        Assert.DoesNotContain("mdi:StarOutline", vm.Icons);
 
         vm.SelectedIconOption = "mdi:RocketLaunch";
         vm.SelectedIconOption = null; // what the ListBox pushes when Icons is swapped
@@ -102,6 +104,33 @@ public class ListSettingsModalViewModelTests
         Assert.False(ListSettingsModalViewModel.IsKnownIcon("mdi:NoSuchIcon"));
     }
 
+    [Fact]
+    public void IsKnownIcon_AcceptsEveryLegacyBareKeyAndCuratedKey()
+    {
+        Assert.True(ListSettingsModalViewModel.IsKnownIcon("Rocket"));
+        Assert.All(IconKeyConverter.LegacyKinds.Keys, k => Assert.True(ListSettingsModalViewModel.IsKnownIcon(k), k));
+        Assert.All(ListSettingsModalViewModel.IconOptions, k => Assert.True(ListSettingsModalViewModel.IsKnownIcon(k), k));
+        Assert.False(ListSettingsModalViewModel.IsKnownIcon("NoSuchBareKey"));
+    }
+
+    [Fact]
+    public void IconKeys_ResolveToMdiPathData()
+    {
+        // StreamGeometry.Parse (the converter's last step) needs a render interface, i.e. a bootstrapped
+        // Avalonia app, so this checks the step before it: key -> MaterialIconKind -> non-empty path data.
+        var keys = ListSettingsModalViewModel.IconOptions
+            .Concat(IconKeyConverter.LegacyKinds.Keys)
+            .Concat(["mdi:WeatherSunny", "mdi:NoteTextOutline", "mdi:StarOutline", "mdi:CalendarOutline",
+                     "mdi:InboxOutline", "mdi:Pulse", "mdi:EyeOutline"]);
+        Assert.All(keys, k =>
+        {
+            var kind = k.StartsWith(IconKeyConverter.MdiPrefix, StringComparison.Ordinal)
+                ? Enum.Parse<MaterialIconKind>(k[IconKeyConverter.MdiPrefix.Length..])
+                : IconKeyConverter.LegacyKinds[k];
+            Assert.False(string.IsNullOrEmpty(MaterialIconDataProvider.GetData(kind)), k);
+        });
+    }
+
     [Fact]
     public void Color_SwatchAndCustomStaySynced()
     {