Initial commit: Portfolio Website

Vollständige Next.js 15 Portfolio-Website mit:
- Blog-System mit 100+ Artikeln
- Supabase-Integration
- Responsive Design mit Tailwind CSS
- TypeScript-Konfiguration
- Testing-Setup mit Vitest und Playwright

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/actions/contact.ts

@@ -0,0 +1,93 @@
+'use server';
+
+import { validateCsrfToken } from '@/lib/csrf/server';
+
+interface ContactFormData {
+  name: string;
+  email: string;
+  message: string;
+}
+
+interface ContactFormResult {
+  success: boolean;
+  error?: string;
+  errors?: Partial<Record<keyof ContactFormData, string>>;
+}
+
+/**
+ * Server action to handle contact form submissions
+ * Validates CSRF token and form data before processing
+ */
+export async function submitContactForm(
+  formData: FormData
+): Promise<ContactFormResult> {
+  // Extract CSRF token from form data
+  const csrfToken = formData.get('csrfToken');
+
+  // Validate CSRF token
+  if (!csrfToken || typeof csrfToken !== 'string') {
+    return {
+      success: false,
+      error: 'CSRF token is missing',
+    };
+  }
+
+  const isValidToken = await validateCsrfToken(csrfToken);
+  if (!isValidToken) {
+    return {
+      success: false,
+      error: 'Invalid CSRF token',
+    };
+  }
+
+  // Extract and validate form fields
+  const name = formData.get('name')?.toString() || '';
+  const email = formData.get('email')?.toString() || '';
+  const message = formData.get('message')?.toString() || '';
+
+  // Validation
+  const errors: Partial<Record<keyof ContactFormData, string>> = {};
+
+  if (!name.trim()) {
+    errors.name = 'Name is required';
+  }
+
+  if (!email.trim()) {
+    errors.email = 'Email is required';
+  } else if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
+    errors.email = 'Invalid email format';
+  }
+
+  if (!message.trim()) {
+    errors.message = 'Message is required';
+  }
+
+  if (Object.keys(errors).length > 0) {
+    return {
+      success: false,
+      errors,
+    };
+  }
+
+  try {
+    // TODO: Implement actual email sending logic here
+    // For now, we'll simulate successful submission
+    // In production, this would integrate with an email service like:
+    // - Supabase Edge Functions
+    // - SendGrid
+    // - AWS SES
+    // - Resend
+
+    // Simulate processing delay
+    await new Promise(resolve => setTimeout(resolve, 500));
+
+    return {
+      success: true,
+    };
+  } catch (error) {
+    return {
+      success: false,
+      error: error instanceof Error ? error.message : 'Failed to send message',
+    };
+  }
+}