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>

main.js

@@ -88,8 +88,9 @@ function setDiscordActivity() {
           url: 'https://git.sanhost.net/sanasol/hytale-f2p/releases'
         },
         {
-          label: 'Discord',
-          url: 'https://discord.gg/Fhbb9Yk5WW'
+          label: 'Community',
+          // url: 'https://discord.gg/Fhbb9Yk5WW'
+          url: 'https://chat.sanhost.net/invite/Tfz4jCK4'
         }
       ]
     });