feat: Add OAuth email integration and production deployment config

- Add OAuthCredential model for storing Google/Microsoft OAuth tokens
- Add email provider auto-detection endpoint (Gmail, Outlook, Yahoo, etc.)
- Add EmailConfigWizard frontend component with step-by-step setup
- Add OAuth flow endpoints for Google and Microsoft XOAUTH2
- Update production settings to make AWS, Sentry, Mailgun optional
- Update Traefik config for wildcard subdomain routing
- Add logo resize utility script

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

frontend/src/pages/platform/PlatformSettings.tsx

@@ -55,7 +55,8 @@ import {
   useTestSmtpConnection,
   useFetchEmailsNow,
 } from '../../hooks/useTicketEmailSettings';
-import { Send } from 'lucide-react';
+import { Send, Wand2 } from 'lucide-react';
+import EmailConfigWizard from '../../components/EmailConfigWizard';
 
 type TabType = 'general' | 'stripe' | 'tiers' | 'oauth';
 
@@ -119,12 +120,14 @@ const PlatformSettings: React.FC = () => {
 
 const GeneralSettingsTab: React.FC = () => {
   const { t } = useTranslation();
-  const { data: emailSettings, isLoading, error } = useTicketEmailSettings();
+  const { data: emailSettings, isLoading, error, refetch } = useTicketEmailSettings();
   const updateMutation = useUpdateTicketEmailSettings();
   const testImapMutation = useTestImapConnection();
   const testSmtpMutation = useTestSmtpConnection();
   const fetchNowMutation = useFetchEmailsNow();
 
+  const [showWizard, setShowWizard] = useState(false);
+
   const [formData, setFormData] = useState({
     // IMAP settings
     imap_host: '',
@@ -228,14 +231,39 @@ const GeneralSettingsTab: React.FC = () => {
     );
   }
 
+  // Show wizard if requested
+  if (showWizard) {
+    return (
+      <div className="space-y-6">
+        <EmailConfigWizard
+          onComplete={() => {
+            setShowWizard(false);
+            refetch();
+          }}
+          onCancel={() => setShowWizard(false)}
+          initialEmail={emailSettings?.imap_username || ''}
+        />
+      </div>
+    );
+  }
+
   return (
     <div className="space-y-6">
       {/* Email Processing Status */}
       <div className="bg-white dark:bg-gray-800 rounded-lg border border-gray-200 dark:border-gray-700 p-6">
-        <h2 className="text-lg font-semibold text-gray-900 dark:text-white mb-4 flex items-center gap-2">
-          <Mail className="w-5 h-5" />
-          {t('platform.settings.emailProcessing', 'Support Email Processing')}
-        </h2>
+        <div className="flex items-center justify-between mb-4">
+          <h2 className="text-lg font-semibold text-gray-900 dark:text-white flex items-center gap-2">
+            <Mail className="w-5 h-5" />
+            {t('platform.settings.emailProcessing', 'Support Email Processing')}
+          </h2>
+          <button
+            onClick={() => setShowWizard(true)}
+            className="inline-flex items-center gap-2 px-4 py-2 text-sm font-medium text-blue-600 dark:text-blue-400 bg-blue-50 dark:bg-blue-900/20 rounded-lg hover:bg-blue-100 dark:hover:bg-blue-900/30 transition-colors"
+          >
+            <Wand2 className="w-4 h-4" />
+            {t('platform.settings.setupWizard', 'Setup Wizard')}
+          </button>
+        </div>
 
         <div className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-6">
           <div className="flex items-center gap-3 p-3 bg-gray-50 dark:bg-gray-700/50 rounded-lg">