Feature request: Add option to download and upload common settings via JSON file

[tekswirl25]

Description:

Currently, every time the app is opened, all parameters (language, model, speaker count, translation direction, output format, etc.) must be reconfigured manually.
This is time-consuming and increases the chance of forgetting or misconfiguring certain options.

Please add the ability to export and import all configuration settings in a JSON file — so users can quickly restore or switch between predefined setups.

Rationale:

Prevents errors caused by missed or inconsistent settings.
Ensures 100% reproducibility across sessions or devices.
Allows users to maintain several ready-to-use configuration profiles for different workflows.
Greatly speeds up the processing of multiple videos that use the same translation setup.

Proposed behavior:

• Download JSON: Available after all UI parameters are configured (e.g., after the “Submit Video” stage).
• Upload JSON: Available on app launch or after connecting to the Gradio server — automatically fills all fields with saved defaults.
• Important: The configuration JSON must not include any media or subtitle files — only the runtime and UI parameters (e.g., selected language, TTS model, speaker count, output format, etc.).

[tekswirl25]

@R3gm just adding a quick note — having JSON-based configuration save/load (without media or subtitle data) would make repeated sessions much smoother.
It’s a small addition, but it would really help avoid re-entering settings every time while keeping setups consistent across projects.