feat: add Auto Check MH Payment toggle with weekly schedule

Adds a toggle behind the Go button on the Payments page to automatically run the MH batch payment check on a user-selected day of week and hour. Default is off.

- Schema: added autoMhCheckEnabled, autoMhCheckDayOfWeek, autoMhCheckHour to User model
- Backend: new mhBatchPaymentService (shared logic), GET/PUT /auto-mh-check-setting routes, hourly cron job that fires on matching day+hour
- Frontend: toggle + day select (Mon–Sun) + time select (hourly) that persist immediately to DB

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/generated/prisma/index-browser.js

@@ -127,7 +127,10 @@ exports.Prisma.UserScalarFieldEnum = {
   autoBackupEnabled: 'autoBackupEnabled',
   autoBackupHour: 'autoBackupHour',
   usbBackupEnabled: 'usbBackupEnabled',
-  usbBackupHour: 'usbBackupHour'
+  usbBackupHour: 'usbBackupHour',
+  autoMhCheckEnabled: 'autoMhCheckEnabled',
+  autoMhCheckDayOfWeek: 'autoMhCheckDayOfWeek',
+  autoMhCheckHour: 'autoMhCheckHour'
 };
 
 exports.Prisma.PatientScalarFieldEnum = {