feat: Multi-email ticketing system with platform email addresses

- Add PlatformEmailAddress model for managing platform-level email addresses
- Add TicketEmailAddress model for tenant-level email addresses
- Create MailServerService for IMAP integration with mail.talova.net
- Implement PlatformEmailReceiver for processing incoming platform emails
- Add email autoconfiguration for Mozilla, Microsoft, and Apple clients
- Add configurable email polling interval in platform settings
- Add "Check Emails" button on support page for manual refresh
- Add ticket counts to status tabs on support page
- Add platform email addresses management page
- Add Privacy Policy and Terms of Service pages
- Add robots.txt for SEO
- Restrict email addresses to smoothschedule.com domain only

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

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

frontend/src/components/PlatformSidebar.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
 import { useTranslation } from 'react-i18next';
 import { Link, useLocation } from 'react-router-dom';
-import { LayoutDashboard, Building2, MessageSquare, Settings, Users, Shield, HelpCircle, Code } from 'lucide-react';
+import { LayoutDashboard, Building2, MessageSquare, Settings, Users, Shield, HelpCircle, Code, Mail } from 'lucide-react';
 import { User } from '../types';
 import SmoothScheduleLogo from './SmoothScheduleLogo';
 
@@ -63,6 +63,10 @@ const PlatformSidebar: React.FC<PlatformSidebarProps> = ({ user, isCollapsed, to
           <MessageSquare size={18} className="shrink-0" />
           {!isCollapsed && <span>{t('nav.support')}</span>}
         </Link>
+        <Link to="/platform/email-addresses" className={getNavClass('/platform/email-addresses')} title="Email Addresses">
+          <Mail size={18} className="shrink-0" />
+          {!isCollapsed && <span>Email Addresses</span>}
+        </Link>
 
         {isSuperuser && (
           <>
@@ -84,6 +88,10 @@ const PlatformSidebar: React.FC<PlatformSidebarProps> = ({ user, isCollapsed, to
             <HelpCircle size={18} className="shrink-0" />
             {!isCollapsed && <span>{t('nav.help', 'Help')}</span>}
           </Link>
+          <Link to="/help/email" className={getNavClass('/help/email')} title="Email Settings">
+            <Mail size={18} className="shrink-0" />
+            {!isCollapsed && <span>Email Settings</span>}
+          </Link>
           <Link to="/help/api" className={getNavClass('/help/api')} title={t('nav.apiDocs', 'API Documentation')}>
             <Code size={18} className="shrink-0" />
             {!isCollapsed && <span>{t('nav.apiDocs', 'API Docs')}</span>}