Update the spelling of the word "optionnal" to "optional" in 4 places.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Made the file type selection optional in the file upload feature.
- **Bug Fixes**
- Addressed issues with color mode synchronization, persistence, and
user reset behavior.
- Improved caching and bundling of files.
- **Documentation**
- Corrected spelling errors and typos in various documentation files for
better clarity and accuracy.
- **Style**
- Updated admin display labels for enhanced clarity.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Baptiste Arnaud <baptiste.arnaud95@gmail.com>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **Refactor**
- Simplified the build process for Vercel deployment by removing a
redundant command.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
refs #1117
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **Refactor**
- Dynamically construct API URLs for WhatsApp features using environment
variables for improved reliability and configurability.
- Updated `sendWhatsAppMessage` function to use
`env.WHATSAPP_CLOUD_API_URL` for URL construction, allowing for more
dynamic configuration.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Baptiste Arnaud <baptiste.arnaud95@gmail.com>
