v1.4.0: Monatsfilter, Pagination, Rollenverwaltung, DB-Bereinigung

- Liste: Monatsfilter mit ←/→ Navigation, Standard = aktueller Monat
- Liste: Pagination (10 Einträge/Seite)
- BEO-Auswahl filtert nur role='guide'
- logbuch_objekte: ObjektName entfernt, JOIN auf objekte
- utf8mb4 Migration und DB-Charset-Umstellung
- SSH-Tunnel-Support: MySQL auf 127.0.0.1:3336
- phpMyAdmin unter /myadmin

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

app/api/logbuch/route.ts

@@ -25,11 +25,30 @@ const LIST_SQL =
 export async function GET(request: NextRequest) {
   const { searchParams } = new URL(request.url);
   const kuppel = searchParams.get('kuppel') || 'West';
-  const limit = Math.min(parseInt(searchParams.get('limit') || '20'), 100);
+  const limit = Math.min(parseInt(searchParams.get('limit') || '10'), 100);
+  const offset = Math.max(0, parseInt(searchParams.get('offset') || '0'));
+  const month = searchParams.get('month') || '';
+
+  let listWhere = 'WHERE l.Kuppel = ?';
+  let countWhere = 'WHERE Kuppel = ?';
+  let params: (string | number | null)[] = [kuppel];
+  if (month && /^\d{4}-\d{2}$/.test(month)) {
+    const [y, m] = month.split('-').map(Number);
+    const start = `${y}-${String(m).padStart(2, '0')}-01`;
+    const nextM = m === 12 ? 1 : m + 1;
+    const nextY = m === 12 ? y + 1 : y;
+    const end = `${nextY}-${String(nextM).padStart(2, '0')}-01`;
+    listWhere  += ' AND l.Beginn >= ? AND l.Beginn < ?';
+    countWhere += ' AND Beginn >= ? AND Beginn < ?';
+    params = [kuppel, start, end];
+  }
 
   try {
-    const rows = await query(LIST_SQL + ` LIMIT ${limit}`, [kuppel]);
-    return NextResponse.json(rows);
+    const [countRows, entries] = await Promise.all([
+      query('SELECT COUNT(*) AS total FROM logbuch ' + countWhere, params) as Promise<{ total: number }[]>,
+      query(LIST_SQL.replace('WHERE l.Kuppel = ?', listWhere) + ` LIMIT ${limit} OFFSET ${offset}`, params),
+    ]);
+    return NextResponse.json({ entries, total: (countRows as unknown as { total: number }[])[0]?.total ?? 0 });
   } catch (error) {
     console.error('GET /api/logbuch:', error);
     return NextResponse.json({ error: 'Datenbankfehler' }, { status: 500 });