update navigation links, enhance NFC data display, and improve MQTT connection handling

html/header.html

@@ -20,7 +20,7 @@
             <a href="/">Start</a>
             <a href="/waage">Scale</a>
             <a href="/spoolman">Spoolman/Bambu</a>
-            <a href="/rfid">RFID</a>
+            <a href="/">About</a>
         </nav>
         <div class="status-container">
             <div class="status-item">

html/rfid.js

@@ -448,7 +448,7 @@ function updateNfcData(data) {
 
     // HTML für die Datenanzeige erstellen
     let html = `
-        <div style="margin-top: 10px;">
+        <div class="nfc-card-data" style="margin-top: 10px;">
             <p><strong>Brand:</strong> ${data.brand || 'N/A'}</p>
             <p><strong>Type:</strong> ${data.type || 'N/A'} ${data.color_hex ? `<span style="
                 background-color: #${data.color_hex}; 

html/style.css

@@ -255,7 +255,7 @@ button:hover {
 
 p {
     font-size: 1rem;
-    color: #555;
+    color: #ffffff;
 }
 
 a {
@@ -325,6 +325,13 @@ a:hover {
     margin-top: 10px;
 }
 
+.nfc-card-data {
+    padding-left: 20px !important;
+    color: white !important;
+    font-weight: bold !important;
+    margin: 0 auto !important;
+}
+
 .nfc-success {
     color: green;
 }