Added support to import Sillytavern cards.

[NBD-1138]

Card is placed in /avatar/ and a button is generated to choose a live2d model from the model_dict.yaml. Character\NAME.yaml is created. Requires a change to backend src/open_llm_vtuber/routes.py

PR for routes.py already up Open-LLM-VTuber/Open-LLM-VTuber#299

[gemini-code-assist]

Summary of Changes

Hello @NBD-1138, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the application's character management capabilities by enabling direct import of SillyTavern character cards. It provides a dedicated dialog for users to upload either PNG or JSON card files, which are then processed to extract character details such as name, description, and personality. Users can preview the extracted information, select a Live2D model, and create a new character entry within the application, with an option to save embedded avatars from PNG cards. This feature simplifies the process of adding and configuring new characters, making the application more versatile for users who utilize external character card formats.

Highlights

• SillyTavern Card Import: Introduced functionality to import character cards from SillyTavern, supporting both ".png" and ".json" formats.
• New UI Component: Added ImportCardDialog to provide a user interface for selecting card files, previewing character data, and choosing a Live2D model.
• Character Card Parsing Logic: Implemented useImportCard hook to handle the complex parsing of character card data, including extracting embedded JSON from PNG files and decompressing Zlib-compressed chunks using the pako library.
• Live2D Model Integration: Allows users to associate an imported character with an existing Live2D model from the application's model_dict.yaml.
• Avatar Saving (PNG cards): For PNG character cards, the embedded avatar can optionally be saved and uploaded to the /avatar/ directory.

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[gemini-code-assist]

Code Review

This pull request introduces a new feature to import SillyTavern character cards, which is a great addition. The implementation includes parsing logic for both .png and .json card formats, a new dialog for file selection, and integration into the settings UI. My review focuses on improving code maintainability by removing dead code and debug logs, fixing a bug related to a UI component prop, and addressing a couple of issues in the main logic hook, including a bug where a state flag is ignored and another where errors are silently swallowed. Overall, the changes are well-structured, and with these adjustments, the feature will be more robust and easier to maintain.