feat: add debug logging for SMTP configuration and detailed mail delivery status

paperless-frontend/src/api/userSettings.ts

@@ -0,0 +1,23 @@
+import api from './client';
+
+export interface UserSettingsData {
+  smtpHost: string | null;
+  smtpPort: number | null;
+  smtpSecure: boolean;
+  smtpUser: string | null;
+  smtpPassSet: boolean;
+  smtpFrom: string | null;
+  mailSignatureHtml: string | null;
+}
+
+export const userSettingsApi = {
+  get: () => api.get<UserSettingsData>('/api/user-settings').then((r) => r.data),
+
+  update: (data: Partial<UserSettingsData> & { smtpPass?: string }) =>
+    api.put<UserSettingsData>('/api/user-settings', data).then((r) => r.data),
+
+  testSmtp: (cfg: { host: string; port: number; secure: boolean; user: string; pass: string }) =>
+    api
+      .post<{ ok: boolean; error?: string }>('/api/user-settings/test-smtp', cfg)
+      .then((r) => r.data),
+};