Complete Bengali translation based on English file

[jelveh]

The Bengali translation file (bn.js) needs to be updated to include all translations present in the English file (en.js). Currently, the Bengali translation may be incomplete or outdated compared to the English version.

Steps to resolve

1. Compare the contents of src/gui/src/i18n/translations/en.js and src/gui/src/i18n/translations/bn.js
2. For each translation key in en.js, ensure a corresponding translation exists in bn.js
3. If a translation is missing in bn.js, add it with an appropriate Bengali translation
4. If any translations in bn.js are outdated or incorrect, update them to match the current English version

Additional notes

• Please ensure that the translations are culturally appropriate and maintain the intended meaning of the English text
• If certain terms or phrases don't have a direct Bengali equivalent, consider adding translator notes or using transliteration where appropriate

Files to be updated

• src/gui/src/i18n/translations/bn.js

Related files

• src/gui/src/i18n/translations/en.js (reference file)

Thank you for helping to improve the Bengali localization of our project!

[jelveh]

closed via #579