feat: polish chat reply and edit composer bar

feat: replace the old action strip with a Telegram-like compact reply preview

feat: show author labels, message snippets, and close action inline above the composer

android/app/src/main/res/values/strings.xml

@@ -122,7 +122,9 @@
     <string name="chat_no_available_chats">No available chats</string>
     <string name="chat_forwarding">Forwarding...</string>
     <string name="chat_editing_message">Editing message #%1$d</string>
+    <string name="chat_editing_label">Editing message</string>
     <string name="chat_reply_to">Reply to</string>
+    <string name="chat_compose_preview_empty">Attachment</string>
     <string name="chat_delete_message_for_everyone">Delete selected message for everyone?</string>
     <string name="chat_delete_message_for_me">Delete selected message(s) for you?</string>
     <string name="chat_clear_history_confirm">Delete all messages in this chat? This action cannot be undone.</string>