Added support for Streamdeck Pedal and updated UI to better fit the Packed UI style

pirp/public/mahnung_pdf.php

@@ -0,0 +1,45 @@
+<?php
+require_once __DIR__ . '/../src/config.php';
+require_once __DIR__ . '/../src/auth.php';
+require_once __DIR__ . '/../src/db.php';
+require_once __DIR__ . '/../src/invoice_functions.php';
+require_once __DIR__ . '/../src/pdf_functions.php';
+require_login();
+
+$id = isset($_GET['id']) ? (int)$_GET['id'] : 0;
+if (!$id) {
+    header('Location: ' . url_for('invoices.php'));
+    exit;
+}
+
+$pdo = get_db();
+$stmt = $pdo->prepare("SELECT m.*, i.invoice_number FROM mahnungen m JOIN invoices i ON i.id = m.invoice_id WHERE m.id = :id");
+$stmt->execute([':id' => $id]);
+$row = $stmt->fetch(PDO::FETCH_ASSOC);
+
+if (!$row) {
+    header('Location: ' . url_for('invoices.php'));
+    exit;
+}
+
+// PDF vorhanden?
+if (empty($row['pdf_path'])) {
+    archive_mahnung_pdf($id);
+    // Neu laden
+    $stmt->execute([':id' => $id]);
+    $row = $stmt->fetch(PDO::FETCH_ASSOC);
+}
+
+$fullPath = __DIR__ . '/' . ($row['pdf_path'] ?? '');
+if (!file_exists($fullPath)) {
+    http_response_code(404);
+    echo 'PDF nicht gefunden.';
+    exit;
+}
+
+$safe_name = 'MAHNUNG-' . preg_replace('/[^A-Za-z0-9\-]/', '_', $row['invoice_number']) . '-L' . $row['level'] . '.pdf';
+header('Content-Type: application/pdf');
+header('Content-Disposition: inline; filename="' . $safe_name . '"');
+header('Content-Length: ' . filesize($fullPath));
+readfile($fullPath);
+exit;