feat: add smoke tests for onboarding

[lucaseduoli]

This pull request introduces a comprehensive set of improvements to the frontend codebase, primarily focused on enhancing testability by adding data-testid attributes to numerous interactive components and UI elements. This will make it easier to write robust automated tests and improve the reliability of the testing process. Additionally, there are some minor refactorings for code clarity and maintainability, as well as updates to environment configuration for Langflow integration.

Testability and QA Improvements:

• Added data-testid attributes to buttons, switches, tabs, progress bars, input fields, and other key UI elements across chat, onboarding, and navigation components to facilitate more precise and maintainable automated testing. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27]

Component and Props Refactoring:

• Refactored the ModelSelector component to extend ButtonProps, allowing for better prop forwarding and customization, and updated its prop types for improved flexibility and maintainability. [1] [2] [3] [4]

Environment Configuration:

• Added Langflow-related environment variables to .env.test.example to support Langflow chat and ingest flows in test environments.

Code Style and Clarity:

• Minor formatting and code style improvements in onboarding components for better readability and maintainability.

These changes collectively improve the codebase’s testability, maintainability, and readiness for integration with Langflow.