feat: render display_kind timeline markers as chips, not user bubbles (#904) (#909)

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

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

@@ -968,6 +968,11 @@
     <string name="memory_memories_facts">记忆与事实</string>
     <string name="memory_recent_events">最近的 Agent 自我改进事件</string>
     <string name="message_reasoning_steps">推理 · %1$s 步</string>
+    <string name="timeline_marker_model_switch">模型已切换</string>
+    <string name="timeline_marker_model_switch_to">模型已切换至 %1$s</string>
+    <string name="timeline_marker_personality_switch">人格已切换</string>
+    <string name="timeline_marker_auto_continue">回合已自动继续</string>
+    <string name="timeline_marker_delegation_complete">委派任务已完成</string>
     <string name="message_your_response">你的回复</string>
     <string name="moa_add_preset">添加预设</string>
     <string name="moa_add_reference">添加参考模型</string>