fix(ui): remove duplicate list-settings context menu entry

List settings were reachable via three doors (header button, context
menu, double-click). Drop the context menu entry, matching the same
cut already made for the "Let Claude handle it" entry point.

src/ClaudeDo.Localization/locales/de.json

@@ -194,7 +194,6 @@
     "settingsTip": "Einstellungen",
     "smartListsLabel": "INTELLIGENTE LISTEN",
     "myListsLabel": "MEINE LISTEN",
-    "contextSettings": "Einstellungen...",
     "contextWorktrees": "Worktrees…",
     "contextOpenExplorer": "Im Explorer öffnen",
     "contextOpenTerminal": "Im Terminal öffnen",

src/ClaudeDo.Localization/locales/en.json

@@ -194,7 +194,6 @@
     "settingsTip": "Settings",
     "smartListsLabel": "SMART LISTS",
     "myListsLabel": "MY LISTS",
-    "contextSettings": "Settings...",
     "contextWorktrees": "Worktrees…",
     "contextOpenExplorer": "Open in Explorer",
     "contextOpenTerminal": "Open in Terminal",

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

@@ -123,9 +123,6 @@
                       DragDrop.Drop="OnListDrop">
                 <Border.ContextMenu>
                   <ContextMenu>
-                    <MenuItem Header="{loc:Tr lists.contextSettings}"
-                              Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenListSettingsCommand}"
-                              CommandParameter="{Binding}"/>
                     <MenuItem Header="{loc:Tr lists.contextWorktrees}"
                               Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenWorktreesOverviewCommand}"
                               CommandParameter="{Binding}"/>