Fix iOS text color, viewport meta tag, and security improvements

- Add viewport meta tag to prevent iOS zoom/scaling issues
- Fix text color on iOS Safari (explicit text-gray-900 on buttons, inputs, TimePicker5)
- Add session checks to /api/beos, /api/objekte, /api/wetter
- Revert iframe embedding (X-Frame-Options: DENY, SameSite: lax)
- docker-compose.prod.yml: fix DB_PORT=3306 for production
- Add docker-compose.prod.yml, .env.prod.example, dump/import scripts

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

server_import.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# Auf dem Server ausführen, nachdem docker-compose gestartet wurde.
+# Importiert logbuch_dump.sql in den laufenden logbuch_mysql-Container.
+
+set -e
+
+CONTAINER="logbuch_mysql"
+DB="sternwarte"
+DUMPFILE="${1:-logbuch_dump.sql}"
+
+if [ ! -f "$DUMPFILE" ]; then
+  echo "FEHLER: Dump-Datei '$DUMPFILE' nicht gefunden." >&2
+  exit 1
+fi
+
+# Root-Passwort aus .env.prod lesen
+ROOT_PASS=$(grep DB_ROOT_PASS .env.prod | cut -d= -f2)
+if [ -z "$ROOT_PASS" ]; then
+  echo "FEHLER: DB_ROOT_PASS nicht in .env.prod gefunden." >&2
+  exit 1
+fi
+
+echo "Importiere '$DUMPFILE' in Container '$CONTAINER'..."
+docker exec -i "$CONTAINER" mysql -u root -p"$ROOT_PASS" "$DB" < "$DUMPFILE"
+
+echo "Verifikation:"
+for TABLE in beos objekte logbuch logbuch_beos logbuch_objekte; do
+  COUNT=$(docker exec "$CONTAINER" mysql -u root -p"$ROOT_PASS" -sN \
+    -e "SELECT COUNT(*) FROM $TABLE;" "$DB" 2>/dev/null)
+  printf "  %-25s %5s Zeilen\n" "$TABLE" "$COUNT"
+done
+
+echo "Import abgeschlossen."