me-web? skeleton: Avalonia 12 app, server, packaging and CI

The first screen (online or not, a Check button, every language with a
draft notice), the desktop and Android heads, the server's /api/info and
/api/ip, a release tool that builds deb, rpm, a Windows exe, macOS zips,
a signed APK and the server, and the Gitea workflows that run it. Rules
adapted from passolo; AGPL-3.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

.gitea/scripts/deploy-server.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+set -eu
+archive=$1
+app=/var/www/meweb.arasaka.software
+backups=/var/backups/meweb.arasaka.software
+health=http://127.0.0.1:5480/api/info
+stamp=$(date -u +%Y%m%d%H%M%S)
+stage=$(mktemp -d)
+trap 'rm -rf "$stage"' EXIT
+
+tar -xzf "$archive" -C "$stage"
+test -x "$stage/MeWeb.Server"
+
+snapshot=""
+if [ -x "$app/MeWeb.Server" ]; then
+  snapshot="$backups/meweb-$stamp"
+  rsync -a "$app/" "$snapshot/"
+  ls -1dt "$backups"/meweb-* 2>/dev/null | tail -n +4 | xargs -r rm -rf
+fi
+
+sudo systemctl stop meweb || true
+rsync -a --delete "$stage/" "$app/"
+sudo systemctl start meweb
+
+for attempt in $(seq 1 30); do
+  if curl -fsS "$health" | grep -q "\"commit\":\"$COMMIT\""; then
+    echo "deployed $COMMIT: $(curl -fsS "$health")"
+    exit 0
+  fi
+  sleep 1
+done
+
+echo "::error::the new server did not answer with commit $COMMIT"
+sudo systemctl status meweb --no-pager | tail -20 || true
+if [ -n "$snapshot" ]; then
+  sudo systemctl stop meweb || true
+  rsync -a --delete "$snapshot/" "$app/"
+  sudo systemctl start meweb
+  echo "rolled back to $snapshot"
+fi
+exit 1