Webui optimization

[YeopSeung04]

Summary

This PR applies a minimal fix to the WebUI initialization logic to ensure compatibility with recent Gradio versions.

Specifically, it removes deprecated concurrency_count usage in Blocks.queue() and aligns the launch behavior with the current Gradio API.

Motivation

Recent versions of Gradio raise a DeprecationWarning (and fail execution in strict environments) when concurrency_count is passed to queue().

This change prevents WebUI startup failure without affecting any training, inference, or UI logic.

Scope of Change

• WebUI initialization only
• No changes to model logic, training pipeline, or inference behavior
• No impact on existing users beyond improved compatibility

Safety

This change is intentionally minimal and scoped only to WebUI startup.
It should be safe to merge without introducing side effects.

Environment

• Python 3.10 (Windows)
• Gradio 4.x