[Self-Hosted] Instance parses fluxer.gg link as internal invite

Summary

When pasting a link til a fluxer.gg invite into chat in a self hosted instance, fluxer parses this as an internal invite link instead of an external URL.

Steps to reproduce

1. Set up a self-hosted instance
2. Create a guild or open a dm
3. Paste link to fluxer.gg invite, eg https://fluxer.gg/fluxer-developers

Environment

Version: Stable Web 2026.616.45607, Linux (x64), Firefox 152.0, Locale en-US Server OS: Debian 13 Client OS: Arch Linux Browser: Firefox 152.0.1 Device: Laptop

Logs or screenshots

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