feat(notif): allow users to enable/disable specific agents (#1172)

* refactor(ui): add tabs to user notification settings

* feat(notif): allow users to enable/disable specific agents

* fix(ui): only enforce required fields when agent is enabled

* fix(ui): hide unavailable notification agents

* feat(notif): mention admin users for admin Discord notifications

* fix(ui): modify styling of PGP key textareas to suit expected input

* fix(notif): mention all admins when there are multiple and fix rebase error

* fix: add missing form values, and fix Yup validation

* refactor: reduce repeated logic/code in email notif agent

* refactor: move 'Notification Types' label into NotificationTypeSelector component

* fix(email): correct inconsistencies in email template formatting

* refactor: use bitfields for storing user-enabled notif agent types

* feat: improve notification agent logging

* fix(ui): mark string fields as nullable so empty values are not type errors

* fix: add validation for PGP-related inputs

* fix: correctly fetch user in user settings & log mentioned IDs for Discord notifs

* fix(ui): fix mobile nav dropdown text & add hover effect to button-style tabs

* fix(notif): process admin email notifications asynchronously

* fix(logging): log name of notification type instead of its enum value

* fix: mark required fields and pass all user settings values to API

* fix(frontend): call mutate after changing email/Discord/Telegram global notif settings

* refactor: get global notif settings from relevant API endpoints instead of adding to public settings

* fix(notif): fall back to email notifications being enabled (default) if user settings do not exist

* fix(notif): do not set notifyUser for MEDIA_PENDING or MEDIA_AUTO_APPROVED

* fix: expose notif enabled settings in user notif endpoints & remove global enable notif setting

* fix(notif): remove unnecessary allowed_mentions object from Discord payload

* fix(notif): use form values for email test notification

* fix: make suggested changes and regenerate DB migration

* fix: loosen validation of PGP keys

* fix: fix user profile settings routes

* fix: remove route guard from profile pages

server/lib/email/index.ts

@@ -1,11 +1,10 @@
-import nodemailer from 'nodemailer';
 import Email from 'email-templates';
-import { getSettings } from '../settings';
+import nodemailer from 'nodemailer';
+import { NotificationAgentEmail } from '../settings';
 import { openpgpEncrypt } from './openpgpEncrypt';
-class PreparedEmail extends Email {
-  public constructor(pgpKey?: string) {
-    const settings = getSettings().notifications.agents.email;
 
+class PreparedEmail extends Email {
+  public constructor(settings: NotificationAgentEmail, pgpKey?: string) {
     const transport = nodemailer.createTransport({
       host: settings.options.smtpHost,
       port: settings.options.smtpPort,