Initial implementation: Logbuch Sternwarte Welzheim

Vollständige Next.js 16 Webanwendung als Logbuch für die Sternwarte Welzheim.
4 Kuppeln (West/Ost/Süd/Pluto), BEO-basierte Authentifizierung mit erzwungenem
Passwort-Wechsel beim Erstlogin, MySQL-Backend, Docker-Deployment.

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

lib/db.ts

@@ -0,0 +1,27 @@
+import mysql from 'mysql2/promise';
+import type { QueryResult } from 'mysql2/promise';
+
+const dbConfig = {
+  host: process.env.DB_HOST || 'mydbase_mysql',
+  user: process.env.DB_USER,
+  password: process.env.DB_PASS,
+  database: process.env.DB_NAME || 'logbuch',
+  waitForConnections: true,
+  connectionLimit: 10,
+  queueLimit: 0,
+};
+
+let pool: mysql.Pool | null = null;
+
+export function getPool() {
+  if (!pool) {
+    pool = mysql.createPool(dbConfig);
+  }
+  return pool;
+}
+
+export async function query(sql: string, params?: (string | number | null)[]): Promise<QueryResult> {
+  const p = getPool();
+  const [rows] = await p.execute(sql, params || []);
+  return rows as QueryResult;
+}