v2.4.3: Replace Discord links with Community Chat & Telegram

Discord server was DMCA'd. All Discord links replaced with:
- Community Chat (Stoat): chat.sanhost.net
- Telegram Channel: @hf2p_og
- Telegram Group: @sanhostnet

Launcher UI: added community links on main screen, renamed
Discord nav to Community Chat, updated popup modal.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

TROUBLESHOOTING.md

@@ -1,6 +1,7 @@
 # Hytale F2P Launcher - Troubleshooting Guide
 
-This guide covers common issues and their solutions. If your issue isn't listed here, please check [existing issues](https://github.com/amiayweb/Hytale-F2P/issues) or join our [Discord](https://discord.gg/Fhbb9Yk5WW).
+This guide covers common issues and their solutions. If your issue isn't listed here, please check [existing issues](https://github.com/amiayweb/Hytale-F2P/issues) or join our [Community Chat](https://chat.sanhost.net/invite/Tfz4jCK4) | [TG Channel](https://t.me/hf2p_og) | [TG Group](https://t.me/sanhostnet).
+<!-- Discord: https://discord.gg/Fhbb9Yk5WW -->
 
 ---
 
@@ -437,7 +438,8 @@ Game sessions have a 10-hour TTL. This is by design for security.
 If your issue isn't resolved by this guide:
 
 1. **Check existing issues:** [GitHub Issues](https://github.com/amiayweb/Hytale-F2P/issues)
-2. **Join Discord:** [discord.gg/Fhbb9Yk5WW](https://discord.gg/Fhbb9Yk5WW)
+2. **Join Community:** [Chat](https://chat.sanhost.net/invite/Tfz4jCK4) | [Telegram](https://t.me/hf2p_og)
+   <!-- Discord: https://discord.gg/Fhbb9Yk5WW -->
 3. **Open a new issue** with:
    - Your operating system and version
    - Launcher version