No, I did not directly modify your frontend files (`.html`, `.js`, or `.css`).

My role is to provide the code and instructions for you to apply. I created a file named `frontend_changes.txt` which contains:

1.  **HTML Structure:** The HTML code you need to add to your task editing popup. You should integrate this into wherever your `estruturaTarefa` JavaScript function generates the popup's content.
2.  **CSS Styling:** Example CSS to style the new elements. This is generic CSS, and you might need to adapt it to fit seamlessly with your existing stylesheets (`painel.css`, `dark.css`, `mobile.css`, etc.), ensuring it matches your project's specific design and responsive requirements. I provided it as a starting point.
3.  **JavaScript (jQuery):** The jQuery code to handle the interactivity of the multi-profile selection. This code should be added to a relevant JavaScript file that loads with your application, or directly within a `<script>` tag in your `footer.php`. It also includes instructions on where to integrate the `popularListaPerfis` function call within your `openPopupTarefa` function to populate the data correctly.

The modifications I made were to the backend PHP files:
-   `browse/AJAX/edicao-page.php`: To include the list of available profiles and the task's selected profiles in the JSON response for the task editing popup.
-   `browse/AJAX/save-page.php`: To add a new action (`saveTarefaPerfis`) that handles the efficient saving and updating of the profiles associated with a task.

You will need to manually apply the changes described in `frontend_changes.txt` to your actual frontend files.