fix: correct mailbox endpoint path and quota field name

- get_domain_mailboxes: was POST /api/v1/get/mailboxes/{domain},
  correct path is GET /api/v1/get/mailbox/all/{domain}
- Quota percentage field is percent_in_use, not quota_used_in_percent

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

assets/js/woocow-account.js

@@ -57,7 +57,7 @@
 
             let html = '';
             boxes.forEach(m => {
-                const pct  = parseFloat(m.quota_used_in_percent || 0);
+                const pct  = parseFloat(m.percent_in_use || 0);
                 const used = formatMB(m.quota_used);
                 const max  = formatMB(m.quota);
                 const col  = pct > 85 ? '#e74c3c' : pct > 60 ? '#f39c12' : '#27ae60';

assets/js/woocow-admin.js

@@ -312,7 +312,7 @@
                             <th>Email</th><th>Name</th><th>Quota Used</th><th>Quota Max</th><th>Active</th><th>Actions</th>
                         </tr></thead><tbody>`;
                     boxes.forEach(m => {
-                        const pct  = m.quota_used_in_percent || 0;
+                        const pct  = m.percent_in_use || 0;
                         const used = formatMB(m.quota_used);
                         const max  = formatMB(m.quota);
                         const bar  = `<div class="woocow-quota-bar"><div style="width:${pct}%"></div></div>`;

includes/class-woocow-api.php

@@ -93,9 +93,8 @@ class WooCow_API {
         return $this->request( 'GET', '/api/v1/get/mailbox/' . rawurlencode( $email ) );
     }
 
-    /** Mailcow uses POST for domain-filtered mailbox listing */
     public function get_domain_mailboxes( string $domain ): array {
-        return $this->request( 'POST', '/api/v1/get/mailboxes/' . rawurlencode( $domain ) );
+        return $this->request( 'GET', '/api/v1/get/mailbox/all/' . rawurlencode( $domain ) );
     }
 
     public function create_mailbox( array $data ): array {