feat: Introduce Agent Chat History Popup for Enhanced User Interaction

- Added AgentChatHistoryPopup class to provide a sidebar for displaying recent chat messages, improving user accessibility to chat history.
- Integrated the new popup into the editor's source files, ensuring proper inclusion and functionality within the existing UI framework.
- Refactored related files to accommodate the new popup, enhancing code organization and maintainability.
- Updated CMake configuration to include the new source files, ensuring a seamless build process.

src/app/editor/editor_library.cmake

@@ -41,7 +41,6 @@ set(
   app/editor/system/shortcut_manager.cc
   app/editor/system/popup_manager.cc
   app/editor/system/proposal_drawer.cc
-  app/editor/system/agent_chat_history_popup.cc
   app/editor/agent/agent_chat_history_codec.cc
 )
 
@@ -49,6 +48,7 @@ if(YAZE_WITH_GRPC)
   list(APPEND YAZE_APP_EDITOR_SRC
     app/editor/agent/agent_editor.cc
     app/editor/agent/agent_chat_widget.cc
+    app/editor/agent/agent_chat_history_popup.cc
     app/editor/agent/agent_ui_theme.cc
     app/editor/agent/agent_collaboration_coordinator.cc
     app/editor/agent/network_collaboration_coordinator.cc