Multilanguage Support and Chinese Filename Parsing Issue

First of all, thank you for creating such an excellent download manager. Your work is greatly appreciated!

Multilanguage Support

Have you considered adding multilanguage support to the program? I would be happy to assist by providing translations for Simplified Chinese and German.

Chinese Filename Parsing Issue

I've encountered a small issue when trying to download files with Chinese characters in the filename from a self-hosted Cloudreve instance. The Chinese characters are not being parsed correctly.

Steps to Reproduce:

Set up a local Cloudreve instance
Try to download a file with Chinese characters in the filename
Observe the parsed filename in ab-download-manager

Example:

Original filename: "KomNetze_Prakt_V02_中文翻译.pdf"
Download URL: http://x.x.x.x:xxxx/api/v3/file/download/9cUxR4LNDVf8gdlG?sign=btph8rt20jqP3eWFuLQQYAUiMtF1qhrvLQ0MQMBUKsg%3D%3A1724436075
Parsed filename by ab-download-manager: "KomNetze_PraktV02%E4%B8%AD%E6%96%87%E7%BF%BB%E8%AF%91"

As you can see, the Chinese characters are not decoded properly and remain URL-encoded.

Additional Information:

This issue seems to be specific to certain URL formats. For example, when downloading from GitHub or a local AList instance, Chinese filenames are parsed correctly. These URLs typically look like: https://github.com/Ceelog/DictionaryByGPT4/raw/main/%E5%A8%81%E5%A8%81%E7%9A%84GPT%E5%8D%95%E8%AF%8D%E6%9C%AC(8000%E8%AF%8D).mdx

In these cases, ab-download-manager successfully decodes the Chinese characters in the filename.

Could you please look into this issue and consider implementing a more robust filename parsing method that can handle various URL encoding formats?

Thank you for your time and consideration!

amir1376 / ab-download-manager