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/api/ticketEmailSettings.ts

@@ -78,6 +78,25 @@ export interface FetchNowResult {
   processed: number;
 }
 
+export interface EmailProviderDetectResult {
+  success: boolean;
+  email: string;
+  domain: string;
+  detected: boolean;
+  detected_via?: 'domain_lookup' | 'mx_record';
+  provider: 'google' | 'microsoft' | 'yahoo' | 'apple' | 'aol' | 'zoho' | 'protonmail' | 'unknown';
+  display_name: string;
+  imap_host?: string;
+  imap_port?: number;
+  smtp_host?: string;
+  smtp_port?: number;
+  oauth_supported: boolean;
+  message?: string;
+  notes?: string;
+  suggested_imap_port?: number;
+  suggested_smtp_port?: number;
+}
+
 export interface IncomingTicketEmail {
   id: number;
   message_id: string;
@@ -167,3 +186,77 @@ export const reprocessIncomingEmail = async (id: number): Promise<{
   const response = await apiClient.post(`/api/tickets/incoming-emails/${id}/reprocess/`);
   return response.data;
 };
+
+/**
+ * Detect email provider from email address
+ * Auto-detects Gmail, Outlook, Yahoo, iCloud, etc. from domain
+ * Also checks MX records for custom domains using Google Workspace or Microsoft 365
+ */
+export const detectEmailProvider = async (email: string): Promise<EmailProviderDetectResult> => {
+  const response = await apiClient.post('/api/tickets/email-settings/detect/', { email });
+  return response.data;
+};
+
+// OAuth types and functions
+export interface OAuthStatusResult {
+  google: { configured: boolean };
+  microsoft: { configured: boolean };
+}
+
+export interface OAuthInitiateResult {
+  success: boolean;
+  authorization_url?: string;
+  error?: string;
+}
+
+export interface OAuthCredential {
+  id: number;
+  provider: 'google' | 'microsoft';
+  email: string;
+  purpose: string;
+  is_valid: boolean;
+  is_expired: boolean;
+  last_used_at: string | null;
+  last_error: string;
+  created_at: string;
+}
+
+/**
+ * Get OAuth configuration status
+ */
+export const getOAuthStatus = async (): Promise<OAuthStatusResult> => {
+  const response = await apiClient.get('/api/oauth/status/');
+  return response.data;
+};
+
+/**
+ * Initiate Google OAuth flow
+ */
+export const initiateGoogleOAuth = async (purpose: string = 'email'): Promise<OAuthInitiateResult> => {
+  const response = await apiClient.post('/api/oauth/google/initiate/', { purpose });
+  return response.data;
+};
+
+/**
+ * Initiate Microsoft OAuth flow
+ */
+export const initiateMicrosoftOAuth = async (purpose: string = 'email'): Promise<OAuthInitiateResult> => {
+  const response = await apiClient.post('/api/oauth/microsoft/initiate/', { purpose });
+  return response.data;
+};
+
+/**
+ * List OAuth credentials
+ */
+export const getOAuthCredentials = async (): Promise<OAuthCredential[]> => {
+  const response = await apiClient.get('/api/oauth/credentials/');
+  return response.data;
+};
+
+/**
+ * Delete OAuth credential
+ */
+export const deleteOAuthCredential = async (id: number): Promise<{ success: boolean; message: string }> => {
+  const response = await apiClient.delete(`/api/oauth/credentials/${id}/`);
+  return response.data;
+};