feat(chat): refactor chat message handling and introduce private messaging support

- Updated `uni_message_sender.py` to allow for private messaging by removing the mandatory group ID and adding user ID handling.
- Enhanced chat history retrieval and clearing functions in `routes.py` and `service.py` to support both group and private chat scenarios.
- Introduced a new `ChatScrollContext` for managing message scrolling and highlighting in the chat UI.
- Created a `ListItemEditorHookFactory` for rendering a rich UI editor for list items in configuration settings, replacing the previous JSON text display.
- Improved message serialization for consistent display in chat history.
- Added detailed logging for chat history operations and error handling.

Co-authored-by: Copilot <copilot@github.com>

dashboard/src/components/dynamic-form/DynamicConfigForm.tsx

@@ -157,6 +157,7 @@ export const DynamicConfigForm: React.FC<DynamicConfigFormProps> = ({
                     value={values[key]}
                     onChange={(v) => onChange(key, v)}
                     schema={nestedField ?? nestedSchema}
+                    nestedSchema={nestedSchema}
                   />
                 </div>
               )
@@ -169,6 +170,7 @@ export const DynamicConfigForm: React.FC<DynamicConfigFormProps> = ({
                   value={values[key]}
                   onChange={(v) => onChange(key, v)}
                   schema={nestedField ?? nestedSchema}
+                  nestedSchema={nestedSchema}
                 >
                   <DynamicConfigForm
                     schema={nestedSchema}