fix: mobile diff comment input placeholder and review comments pill

Use a shorter comment placeholder on mobile (drop the Cmd+Enter hint that has
no touch equivalent) so it no longer clips in the auto-sized textarea.

Add a remove (x) button to the review comments pill, matching the annotation
and dev-server-log pills, and stop the mobile touch-target min-height/width
from inflating the pill close buttons.

packages/ui/src/lib/i18n/messages/pl.ts

@@ -1029,6 +1029,7 @@ export const dict: Record<I18nKey, string> = {
   'chat.chatInput.previewContextRemove': 'Usuń kontekst podglądu',
   'chat.chatInput.projectRoot': 'Katalog główny projektu',
   'chat.chatInput.reviewComments': 'Komentarze do przeglądu:',
+  'chat.chatInput.reviewCommentsRemove': 'Usuń komentarze do przeglądu',
   'chat.chatInput.toast.addedFileMentions': 'Dodano {count} wzmianek o plikach',
   'chat.chatInput.toast.attachFileFailed': 'Nie udało się dołączyć pliku',
   'chat.chatInput.toast.attachNamedFailed': 'Nie udało się dołączyć {name}',
@@ -1993,6 +1994,7 @@ export const dict: Record<I18nKey, string> = {
   'inlineComment.actions.showLess': 'Show less',
   'inlineComment.actions.showMore': 'Show more',
   'inlineComment.input.placeholder': 'Add a comment... (Cmd+Enter to save)',
+  'inlineComment.input.placeholderShort': 'Dodaj komentarz...',
   'inlineComment.range.lines': 'Lines {start}-{end}',
   'inlineComment.toast.selectSessionToSave': 'Select a session to save comment',
   'mainLayout.mobile.closeDrawerAria': 'Zamknij szufladę',