feat(ui): interactive chat composer in the session terminal + work console

SessionTerminalView gains an opt-in composer (IsComposerVisible / ComposerText /
SubmitCommand / ComposerPlaceholder styled props); Mission Control binds it to the
monitor VM. Task detail's WorkConsole output tab gets a matching shell-prompt
composer bound through Monitor.*, shown only while an interactive session is live.
log-user lines render in the accent color. Adds session.composer.* (en/de).

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

@@ -107,7 +107,11 @@
           Label="{Binding DisplayTitle}"
           IsRunning="{Binding IsRunning}"
           IsDone="{Binding IsDone}"
-          IsFailed="{Binding IsFailed}" />
+          IsFailed="{Binding IsFailed}"
+          IsComposerVisible="{Binding IsInteractiveLive}"
+          ComposerText="{Binding ComposerDraft, Mode=TwoWay}"
+          SubmitCommand="{Binding SubmitComposerCommand}"
+          ComposerPlaceholder="{loc:Tr session.composer.placeholder}" />
 
     </DockPanel>
   </Border>