feat(i18n): localize ViewModel-built strings via ambient Loc accessor

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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

@@ -91,7 +91,7 @@
                             SelectedItem="{Binding TaskModelSelection, Mode=TwoWay}"
                             HorizontalAlignment="Stretch"/>
                   <TextBlock Classes="meta"
-                             Text="{Binding EffectiveModelHint, StringFormat='Effective if inherited: {0}'}"
+                             Text="{Binding EffectiveModelLabel}"
                              Opacity="0.6"/>
                 </StackPanel>
 
@@ -114,7 +114,7 @@
                     </ComboBox.ItemTemplate>
                   </ComboBox>
                   <TextBlock Classes="meta"
-                             Text="{Binding EffectiveAgentHint, StringFormat='Effective if inherited: {0}'}"
+                             Text="{Binding EffectiveAgentLabel}"
                              Opacity="0.6"/>
                 </StackPanel>
               </StackPanel>

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

@@ -47,13 +47,7 @@
         <!-- Name + machine -->
         <StackPanel Grid.Column="1" Margin="8,0" Spacing="1" VerticalAlignment="Center">
           <TextBlock Classes="title" Text="{Binding UserName}"/>
-          <TextBlock Classes="meta">
-            <TextBlock.Text>
-              <MultiBinding StringFormat="{}{0} / local">
-                <Binding Path="MachineName"/>
-              </MultiBinding>
-            </TextBlock.Text>
-          </TextBlock>
+          <TextBlock Classes="meta" Text="{Binding MachineNameLocal}"/>
         </StackPanel>
         <!-- More button -->
         <Button Grid.Column="2" Classes="icon-btn" VerticalAlignment="Center"

src/ClaudeDo.Ui/Views/Planning/ConflictResolutionView.axaml

@@ -31,8 +31,8 @@
     <!-- Content -->
     <StackPanel Spacing="12" Margin="20,16" MinWidth="520">
       <TextBlock Classes="heading"
-                 Text="{Binding SubtaskTitle, StringFormat='Conflicts in subtask: {0}'}"/>
-      <TextBlock Classes="body" Text="{Binding TargetBranch, StringFormat='Merging into: {0}'}"/>
+                 Text="{Binding SubtaskLabel}"/>
+      <TextBlock Classes="body" Text="{Binding TargetLabel}"/>
       <ItemsControl ItemsSource="{Binding ConflictedFiles}">
         <ItemsControl.ItemTemplate>
           <DataTemplate>