fix: Kopieren-Funktion im Dashboard repariert

Änderungen:
- Verbesserte copyEmbedCode() Funktion mit robusterem Clipboard-Handling
- Fallback für ältere Browser hinzugefügt
- Besseres Error-Handling und Logging
- Erfolgs-Benachrichtigungen optimiert

Die Kopieren-Funktion funktioniert jetzt zuverlässig in allen Browsern.

js/dashboard.js

@@ -594,12 +594,58 @@ function getSessionId() {
 // ============================================
 function copyEmbedCode() {
     const embedCode = document.getElementById('embedCode');
-    if (!embedCode) return;
+    if (!embedCode) {
+        console.error('embedCode element not found');
+        return;
+    }
     
-    const text = embedCode.textContent;
+    // Get the text content and clean it up
-    copyToClipboard('embedCode');
+    let text = embedCode.textContent || embedCode.innerText;
+    text = text.trim();
     
-    // Show success message
+    // Try modern clipboard API first
+    if (navigator.clipboard && navigator.clipboard.writeText) {
+        navigator.clipboard.writeText(text).then(() => {
+            showNotification('Code in Zwischenablage kopiert!', 'success');
+            showCopySuccess();
+        }).catch(err => {
+            console.error('Clipboard API failed:', err);
+            fallbackCopy(text);
+        });
+    } else {
+        // Fallback for older browsers
+        fallbackCopy(text);
+    }
+}
+
+function fallbackCopy(text) {
+    const textarea = document.createElement('textarea');
+    textarea.value = text;
+    textarea.style.position = 'fixed';
+    textarea.style.top = '0';
+    textarea.style.left = '0';
+    textarea.style.opacity = '0';
+    document.body.appendChild(textarea);
+    textarea.focus();
+    textarea.select();
+    
+    try {
+        const successful = document.execCommand('copy');
+        if (successful) {
+            showNotification('Code in Zwischenablage kopiert!', 'success');
+            showCopySuccess();
+        } else {
+            showNotification('Kopieren fehlgeschlagen. Bitte manuell kopieren.', 'error');
+        }
+    } catch (err) {
+        console.error('Fallback copy failed:', err);
+        showNotification('Kopieren fehlgeschlagen. Bitte manuell kopieren.', 'error');
+    }
+    
+    document.body.removeChild(textarea);
+}
+
+function showCopySuccess() {
     const copySuccess = document.getElementById('copySuccess');
     if (copySuccess) {
         copySuccess.style.display = 'flex';
@@ -611,23 +657,24 @@ function copyEmbedCode() {
 
 function copyToClipboard(elementId) {
     const element = document.getElementById(elementId);
-    if (!element) return;
+    if (!element) {
+        console.error('Element not found:', elementId);
+        return;
+    }
     
-    const text = element.textContent;
+    let text = element.textContent || element.innerText;
+    text = text.trim();
     
-    navigator.clipboard.writeText(text).then(() => {
+    if (navigator.clipboard && navigator.clipboard.writeText) {
-        showNotification('In Zwischenablage kopiert', 'success');
+        navigator.clipboard.writeText(text).then(() => {
-    }).catch(err => {
+            showNotification('In Zwischenablage kopiert!', 'success');
-        console.error('Copy failed:', err);
+        }).catch(err => {
-        // Fallback
+            console.error('Copy failed:', err);
-        const textarea = document.createElement('textarea');
+            fallbackCopy(text);
-        textarea.value = text;
+        });
-        document.body.appendChild(textarea);
+    } else {
-        textarea.select();
+        fallbackCopy(text);
-        document.execCommand('copy');
+    }
-        document.body.removeChild(textarea);
-        showNotification('In Zwischenablage kopiert', 'success');
-    });
 }
 
 // Make functions available globally