fix: update to AhaSend API v1 key

- Switch from API v2 to API v1 key
- Simplify payload format for v1 API
- Update documentation with domain verification requirement
- API Key v1: pxZ2d30PIqTl6Uj7p6g3o0uez2AacMaOstKCTcj9MTIrNEBvhikgvyAARUTvXAcA

Note: Domain beachlitter.ie likely needs verification in AhaSend dashboard

server/src/services/emailService.ts

@@ -1,7 +1,7 @@
 import axios from 'axios';
 
 // AhaSend API configuration
-const AHASEND_API_KEY = process.env.AHASEND_API_KEY || 'aha-sk-A0c9WOA8cs3RpvkAGwHOP9o6pHx-gLTUki1gSWVeC_6kd86-Npn077zta-rvg9oo';
+const AHASEND_API_KEY = process.env.AHASEND_API_KEY || 'pxZ2d30PIqTl6Uj7p6g3o0uez2AacMaOstKCTcj9MTIrNEBvhikgvyAARUTvXAcA';
 const AHASEND_ACCOUNT_ID = process.env.AHASEND_ACCOUNT_ID || '8a14f9a5-6e6d-47c9-b5d6-a687265b36a3';
 const FROM_EMAIL = process.env.FROM_EMAIL || 'Beach Litter Platform <noreply@beachlitter.ie>';
 
@@ -18,20 +18,12 @@ export class EmailService {
    */
   async sendEmail(data: EmailData): Promise<boolean> {
     try {
-      // Parse from email
-      const fromMatch = FROM_EMAIL.match(/<(.+)>/);
-      const fromEmail = fromMatch ? fromMatch[1] : FROM_EMAIL;
-      const fromName = FROM_EMAIL.replace(/<.+>/, '').trim();
-
       const payload = {
-        to: [{ email: data.to }],
-        from: { 
-          email: fromEmail,
-          name: fromName || 'Beach Litter Platform'
-        },
+        to: data.to,
+        from: FROM_EMAIL,
         subject: data.subject,
-        text_body: data.text,
-        html_body: data.html || this.generateHtmlFromText(data.text),
+        text: data.text,
+        html: data.html || this.generateHtmlFromText(data.text),
       };
 
       console.log('[Email] Sending request to AhaSend API...');
@@ -39,7 +31,7 @@ export class EmailService {
       console.log('[Email] Account ID:', AHASEND_ACCOUNT_ID);
 
       const response = await axios.post(
-        `https://api.ahasend.com/v1/email`,
+        `https://api.ahasend.com/v1/messages`,
         payload,
         {
           headers: {