feat(ui): answer a running task's question inline in Mission Control

TaskMonitorViewModel surfaces a pending AskUser question (TaskQuestionAsked /
TaskQuestionResolved events) with an AnswerDraft + SubmitAnswerCommand that calls
the new IWorkerClient.AnswerTaskQuestionAsync; MonitorPaneView shows an accent
question banner with an input box above the terminal. Pending question is cleared
on answer/resolve/finish and re-hydrated on attach via GetPendingQuestionAsync.
en/de localization for missionControl.question.*; test fakes updated.

src/ClaudeDo.Ui/Views/MissionControl/MonitorPaneView.axaml

@@ -73,6 +73,34 @@
         </StackPanel>
       </Border>
 
+      <!-- Question prompt (AskUser): answer a running task's question inline -->
+      <Border DockPanel.Dock="Top"
+              IsVisible="{Binding HasPendingQuestion}"
+              Background="{DynamicResource AccentSoftBrush}"
+              BorderBrush="{DynamicResource AccentBrush}"
+              BorderThickness="0,0,0,1" Padding="12,8">
+        <StackPanel Spacing="6">
+          <TextBlock Classes="meta"
+                     Text="{loc:Tr missionControl.question.title}"
+                     Foreground="{DynamicResource AccentBrush}" FontWeight="SemiBold" />
+          <TextBlock Text="{Binding PendingQuestion}" TextWrapping="Wrap"
+                     Foreground="{DynamicResource TextBrush}" />
+          <Grid ColumnDefinitions="*,Auto" ColumnSpacing="6">
+            <TextBox Grid.Column="0"
+                     Text="{Binding AnswerDraft, UpdateSourceTrigger=PropertyChanged}"
+                     PlaceholderText="{loc:Tr missionControl.question.placeholder}"
+                     AcceptsReturn="False">
+              <TextBox.KeyBindings>
+                <KeyBinding Gesture="Enter" Command="{Binding SubmitAnswerCommand}" />
+              </TextBox.KeyBindings>
+            </TextBox>
+            <Button Grid.Column="1"
+                    Content="{loc:Tr missionControl.question.send}"
+                    Command="{Binding SubmitAnswerCommand}" />
+          </Grid>
+        </StackPanel>
+      </Border>
+
       <!-- Console body: reuse SessionTerminalView -->
       <islands:SessionTerminalView
           Entries="{Binding Log}"