refactor: migrate container registry from 80.71.235.15:3000 to git.tx1138.com/lfg2025

All hardcoded references to the old IP-based registry replaced across
Rust backend, Vue frontend, shell scripts, Dockerfiles, CI, and docs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/build-iso-dev.yml

@@ -86,7 +86,7 @@ jobs:
         run: |
           sudo mkdir -p /etc/containers/registries.conf.d
           echo '[[registry]]
-          location = "80.71.235.15:3000"
+          location = "git.tx1138.com"
           insecure = true' | sudo tee /etc/containers/registries.conf.d/archipelago.conf
 
       - name: Build unbundled ISO