The AI Fields feature now shows a clearer error message when the language model does not provide an answer. This helps users better understand what happened and reduces confusion when an AI-generated response is empty.

Task-4794401

The IoT app demo data now includes examples for a Fiscal Data Module and an Unsupported Device, along with a matching icon. This helps users and sales teams better demonstrate how the app represents different device types, including unsupported hardware.

This PR adds a "Fiscal Data Module" and an "Unsupported Device" to the demo data in the IoT app + it adds a new svg icon file for the unsupported device

![image](https://github.com/user-attachments/assets/1624723d-6867-4e71-83bc-b26fec7a2009)

Related task: 4770381

Server actions now use simpler automatic names, making them easier for users to recognize and manage. The related kanban view was also adjusted so these actions remain clear and consistent in day-to-day workflows.

Task id: opw-4736084

Search operator wording has been updated in spreadsheet document and Studio test coverage to match recent platform changes. This helps keep automated checks aligned with the current user interface and reduces the risk of false test failures.

We adapt some tests in documents_spreadsheet and web_studio to the changes brought by https://github.com/odoo/odoo/pull/210131

Task ID: 4798097