Mail: Outlook.com inside the app through Microsoft Graph (folders, reader, compose, reply, unread badge); Cypht webmail removed

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.env.example

@@ -20,17 +20,7 @@ AUDIOBOOKS_LOGIN_LINK=
 AUDIOBOOKS_SSO_SECRET=
 #AUDIOBOOKS_SSO_URL=https://audiobooks.necloud.us/sso
 
-# Optional: a webmail you run elsewhere, to show in the Mail tab instead of the bundled Cypht (it must allow framing). Leave blank normally. See README (Mail).
-WEBMAIL_URL=
-
-# Webmail (Cypht) login. Choose a password; the Mail tab signs in with it for you. Required.
-CYPHT_PASSWORD=
-#CYPHT_USER=hub
-# Sign in with Google / Microsoft instead of app passwords (optional; see README -> Mail)
-GMAIL_CLIENT_ID=
-GMAIL_CLIENT_SECRET=
-OUTLOOK_CLIENT_ID=
-OUTLOOK_CLIENT_SECRET=
-OFFICE365_CLIENT_ID=
-OFFICE365_CLIENT_SECRET=
-M365_TENANT=
+# Mail (Outlook.com personal accounts, through Microsoft Graph). Register an app at entra.microsoft.com (see README -> Mail),
+# then put its Application (client) ID here. The secret is only needed if you registered it as a "Web" app.
+MS_CLIENT_ID=
+MS_CLIENT_SECRET=