feat: 恢复模型直答功能及直答历史

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

@@ -16,6 +16,7 @@
     <string name="temp_balanced">平衡</string>
     <string name="temp_creative">创意</string>
     <string name="btn_generate">生成</string>
+    <string name="btn_direct_answer">直答</string>
     <string name="btn_optimize">优化提示词</string>
     <string name="result_placeholder">生成结果将显示在这里…</string>
     <string name="btn_copy">复制</string>
@@ -24,9 +25,11 @@
     <string name="btn_history">历史</string>
     <string name="history_title">生成历史</string>
     <string name="history_back">返回</string>
-    <string name="history_tab_optimize">优化历史</string>
-    <string name="history_tab_generation">生成历史</string>
+    <string name="history_tab_optimize">优化</string>
+    <string name="history_tab_generation">生成</string>
+    <string name="history_tab_direct_answer">直答</string>
     <string name="history_empty_optimize">暂无优化记录</string>
     <string name="history_empty_generation">暂无生成记录</string>
+    <string name="history_empty_direct_answer">暂无直答记录</string>
     <string name="history_use">使用</string>
 </resources>