feat(chat): simplify assistant message states (#1131)

app/src/main/res/values-ko/strings.xml

@@ -187,7 +187,13 @@
     <string name="settings_sec_chat">채팅</string>
     <string name="settings_item_typing_effect">타이핑 효과</string>
     <string name="settings_desc_typing_effect">새 메시지를 단어 단위로 애니메이션</string>
-    <string name="fullbleed_role_agent">어시스턴트</string>
+    <string name="chat_agent_status_typing">에이전트 입력 중</string>
+    <string name="chat_agent_status_thinking">생각 중…</string>
+    <string name="chat_agent_status_searching">검색 중…</string>
+    <string name="chat_agent_status_reading">파일 읽는 중…</string>
+    <string name="chat_agent_status_browsing">탐색 중…</string>
+    <string name="chat_agent_status_running_command">명령 실행 중…</string>
+    <string name="chat_agent_status_using_tool">도구 사용 중…</string>
     <string name="settings_item_typing_delay">지연: %1$d ms</string>
     <string name="settings_delay_10ms">10 ms</string>
     <string name="settings_delay_100ms">100 ms</string>