feat(ui): open a list's findings folder

src/ClaudeDo.Localization/locales/de.json

@@ -197,6 +197,7 @@
     "contextWorktrees": "Worktrees…",
     "contextOpenExplorer": "Im Explorer öffnen",
     "contextOpenTerminal": "Im Terminal öffnen",
+    "contextOpenFindings": "Findings-Ordner öffnen",
     "newList": "Neue Liste",
     "addReposTip": "Repos als Listen hinzufügen"
   },

src/ClaudeDo.Localization/locales/en.json

@@ -197,6 +197,7 @@
     "contextWorktrees": "Worktrees…",
     "contextOpenExplorer": "Open in Explorer",
     "contextOpenTerminal": "Open in Terminal",
+    "contextOpenFindings": "Open findings folder",
     "newList": "New list",
     "addReposTip": "Add repos as lists"
   },

src/ClaudeDo.Ui/ViewModels/Islands/ListsIslandViewModel.cs

@@ -120,6 +120,24 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
         catch { /* best-effort */ }
     }
 
+    [RelayCommand]
+    private void OpenFindings(ListNavItemViewModel? row)
+    {
+        var dir = row?.WorkingDir;
+        if (string.IsNullOrWhiteSpace(dir)) return;
+        var findings = System.IO.Path.Combine(dir, ".claudedo");
+        if (!System.IO.Directory.Exists(findings)) return;
+        try
+        {
+            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo
+            {
+                FileName = findings,
+                UseShellExecute = true,
+            });
+        }
+        catch { /* best-effort */ }
+    }
+
     [RelayCommand]
     private void OpenInTerminal(ListNavItemViewModel? row)
     {

src/ClaudeDo.Ui/Views/Islands/ListsIslandView.axaml

@@ -131,6 +131,10 @@
                               IsVisible="{Binding WorkingDir, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"
                               Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenInExplorerCommand}"
                               CommandParameter="{Binding}"/>
+                    <MenuItem Header="{loc:Tr lists.contextOpenFindings}"
+                              IsVisible="{Binding WorkingDir, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"
+                              Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenFindingsCommand}"
+                              CommandParameter="{Binding}"/>
                     <MenuItem Header="{loc:Tr lists.contextOpenTerminal}"
                               IsVisible="{Binding WorkingDir, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"
                               Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenInTerminalCommand}"