feat(ui): show queued interactive messages above the composer

A queued message now appears in a pending strip above the input box (driven by
InteractiveQueueChanged), not optimistically in the transcript. The transcript
user line is added on delivery via InteractiveMessageSent. SessionTerminalView
gains QueuedMessages/HasQueuedMessages styled props (Mission Control); WorkConsole
binds Monitor.* (task detail). Adds session.composer.queued (en/de).

src/ClaudeDo.Localization/locales/de.json

@@ -236,7 +236,8 @@
       "placeholder": "Nachricht an die Sitzung…",
       "send": "Senden",
       "stop": "Sitzung beenden",
-      "interrupt": "Aktuellen Zug unterbrechen"
+      "interrupt": "Aktuellen Zug unterbrechen",
+      "queued": "Wartet — wird nach dem aktuellen Zug gesendet"
     }
   },
   "missionControl": {