Refactor for i18n, CMS integration, and project slugs; enhance admin & analytics

Co-authored-by: dennis <dennis@konkol.net>

components/EmailManager.tsx

@@ -120,6 +120,24 @@ export const EmailManager: React.FC = () => {
       });
       
       if (response.ok) {
+        // Persist responded status in DB
+        try {
+          await fetch(`/api/contacts/${selectedMessage.id}`, {
+            method: 'PUT',
+            headers: {
+              'Content-Type': 'application/json',
+              'x-admin-request': 'true',
+              'x-session-token': sessionToken,
+            },
+            body: JSON.stringify({
+              responded: true,
+              responseTemplate: 'reply',
+            }),
+          });
+        } catch {
+          // ignore persistence failures
+        }
+
         setMessages(prev => prev.map(msg => 
           msg.id === selectedMessage.id ? { ...msg, responded: true } : msg
         ));