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.Localization/locales/en.json

@@ -231,7 +231,12 @@
     "chipDone": "DONE",
     "chipFailed": "FAILED",
     "reviewContinueTip": "Send this feedback and re-run the task",
-    "reviewResetTip": "Discard all changes and reset the task to Idle"
+    "reviewResetTip": "Discard all changes and reset the task to Idle",
+    "composer": {
+      "placeholder": "Message the session…",
+      "send": "Send",
+      "stop": "Stop session"
+    }
   },
   "missionControl": {
     "openInApp": "Open in app",