Refactor CookieBanner and Contact API for improved functionality and security

- Removed localStorage fallback from CookieBanner, simplifying consent management.
- Refactored manual review email handling in the Contact API to utilize HTML templates for better structure and security.
- Enhanced email content generation by escaping HTML special characters and using template files for dynamic data insertion.

src/components/CookieBanner.astro

@@ -69,19 +69,6 @@ const t = getTranslation(lang);
       return;
     }
 
-    // Also check localStorage as a fallback
-    try {
-      if (localStorage && localStorage.getItem('cookieConsentAccepted') === 'true') {
-        cookieBanner.style.display = 'none';
-        // Also set the cookie for future visits
-        setCookie('cookieConsentAccepted', 'true', 365);
-        return;
-      }
-    } catch (e) {
-      console.error('Error accessing localStorage:', e);
-      // Continue checking cookies
-    }
-
     // Show the banner
     cookieBanner.style.display = 'block';
 
@@ -93,17 +80,9 @@ const t = getTranslation(lang);
 
     // Handle accept button click
     acceptButton.addEventListener('click', () => {
-      // Store consent in cookie (primary storage)
+      // Store consent in cookie
       setCookie('cookieConsentAccepted', 'true', 365);
 
-      // Also store in localStorage as backup
-      try {
-        localStorage.setItem('cookieConsentAccepted', 'true');
-      } catch (e) {
-        console.error('Error setting localStorage:', e);
-        // Continue with cookie storage
-      }
-
       // Hide the banner with animation
       cookieBanner.classList.add('translate-y-full');