fix: Remove console error and improve copy-code utility cross-browser…

src/utils/copy-code.ts

@@ -14,7 +14,7 @@ function handleCopyClick(event: Event): void {
   const codeContent = button.getAttribute('data-code');
 
   if (!codeContent) {
-    console.error('No code content found to copy');
+    showErrorFeedback(button, 'No content to copy');
     return;
   }
 
@@ -28,37 +28,94 @@ async function copyToClipboard(
   text: string,
   button: HTMLElement,
 ): Promise<void> {
+  // Check if clipboard API is available and we're in a secure context
+  if (navigator.clipboard && window.isSecureContext) {
+    try {
+      await navigator.clipboard.writeText(text);
+      showSuccessMessage(button);
+      return;
+    } catch {
+      // Fall through to legacy method
+    }
+  }
+
+  // Fallback for older browsers or insecure contexts
   try {
-    await navigator.clipboard.writeText(text);
-    showSuccessMessage(button);
-  } catch {
-    // Fallback for older browsers
     const textarea = document.createElement('textarea');
     textarea.value = text;
     textarea.style.cssText =
-      'position:fixed;left:-999999px;top:-999999px;opacity:0;';
+      'position:fixed;left:-999999px;top:-999999px;opacity:0;pointer-events:none;';
 
     document.body.appendChild(textarea);
+    textarea.focus();
     textarea.select();
 
+    // For mobile devices
+    textarea.setSelectionRange(0, 99999);
+
     const success = document.execCommand('copy');
     document.body.removeChild(textarea);
 
-    if (success) showSuccessMessage(button);
+    if (success) {
+      showSuccessMessage(button);
+    } else {
+      showErrorFeedback(button, 'Copy failed - please copy manually');
+    }
+  } catch {
+    showErrorFeedback(button, 'Copy not supported in this browser');
   }
 }
 
 /**
  * Show success message
  */
 function showSuccessMessage(button: HTMLElement): void {
+  // Update button text temporarily
+  const originalText = button.textContent;
+  button.textContent = 'Copied!';
+  button.style.backgroundColor = '#10b981';
+  button.style.color = 'white';
+
+  setTimeout(() => {
+    button.textContent = originalText;
+    button.style.backgroundColor = '';
+    button.style.color = '';
+  }, 2000);
+
+  // Also check for success message element
   const successMessage = button.nextElementSibling as HTMLElement;
   if (successMessage?.classList.contains('copy-success-message')) {
     successMessage.classList.remove('hidden');
     setTimeout(() => successMessage.classList.add('hidden'), 2000);
   }
 }
 
+/**
+ * Show error feedback to user
+ */
+function showErrorFeedback(button: HTMLElement, message: string): void {
+  // Update button text temporarily
+  const originalText = button.textContent;
+  button.textContent = 'Failed';
+  button.style.backgroundColor = '#ef4444';
+  button.style.color = 'white';
+
+  setTimeout(() => {
+    button.textContent = originalText;
+    button.style.backgroundColor = '';
+    button.style.color = '';
+  }, 2000);
+
+  // Show tooltip or alert as fallback
+  if ('title' in button) {
+    const originalTitle = button.title;
+    button.title = message;
+    setTimeout(() => {
+      button.title = originalTitle;
+    }, 3000);
+  }
+}
+
 /**
  * Initialize copy code functionality
  */