fix(ui): stop review-feedback field clipping placeholder and typed text

Shorten the review-prompt placeholder and localize it (session.reviewFeedbackPlaceholder,
en+de) instead of a hardcoded string that overran the narrow column. Switch the growing
TextBox's VerticalContentAlignment from Center to Top so multi-line input grows downward
instead of being clipped top/bottom, add an auto scrollbar past MaxHeight, and top-align
the prompt glyph and Resume button to match.

src/ClaudeDo.Localization/locales/de.json

@@ -266,7 +266,8 @@
     "chipDone": "FERTIG",
     "chipFailed": "FEHLGESCHLAGEN",
     "reviewContinueTip": "Dieses Feedback senden und die Aufgabe erneut ausführen",
-    "reviewResetTip": "Alle Änderungen verwerfen und die Aufgabe auf Leerlauf zurücksetzen"
+    "reviewResetTip": "Alle Änderungen verwerfen und die Aufgabe auf Leerlauf zurücksetzen",
+    "reviewFeedbackPlaceholder": "Feedback für nächsten Lauf"
   },
   "missionControl": {
     "windowTitle": "Mission Control",

src/ClaudeDo.Localization/locales/en.json

@@ -266,7 +266,8 @@
     "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",
+    "reviewFeedbackPlaceholder": "Feedback for next run"
   },
   "missionControl": {
     "windowTitle": "Mission Control",