feat: Complete email notifications system with comprehensive functionality

- Implement comprehensive email notification system for ticket purchases and event reminders
- Add event reminder job with configurable scheduling
- Enhance ticket mailer with QR code generation and proper formatting
- Update order model with email delivery tracking
- Add comprehensive test coverage for all email functionality
- Configure proper mailer settings and disable annotations
- Update backlog to reflect completed email features

🤖 Generated with [Claude Code](https://claude.ai/code)

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

test/jobs/event_reminder_job_test.rb

@@ -23,9 +23,9 @@ class EventReminderJobTest < ActiveJob::TestCase
   test "logs error when mailer fails" do
     # Mock a failing mailer
     TicketMailer.stubs(:event_reminder).raises(StandardError.new("Test error"))
-    
+
     Rails.logger.expects(:error).with(regexp_matches(/Failed to send event reminder/))
-    
+
     EventReminderJob.perform_now(@event.id, 7)
   end
-end
+end

test/jobs/event_reminder_scheduler_job_test.rb

@@ -9,7 +9,7 @@ class EventReminderSchedulerJobTest < ActiveJob::TestCase
     # Set event to start in exactly 7 days
     @event.update(start_time: 7.days.from_now.beginning_of_day + 10.hours)
 
-    assert_enqueued_with(job: EventReminderJob, args: [@event.id, 7]) do
+    assert_enqueued_with(job: EventReminderJob, args: [ @event.id, 7 ]) do
       EventReminderSchedulerJob.perform_now
     end
   end
@@ -18,7 +18,7 @@ class EventReminderSchedulerJobTest < ActiveJob::TestCase
     # Set event to start tomorrow
     @event.update(start_time: 1.day.from_now.beginning_of_day + 20.hours)
 
-    assert_enqueued_with(job: EventReminderJob, args: [@event.id, 1]) do
+    assert_enqueued_with(job: EventReminderJob, args: [ @event.id, 1 ]) do
       EventReminderSchedulerJob.perform_now
     end
   end
@@ -27,7 +27,7 @@ class EventReminderSchedulerJobTest < ActiveJob::TestCase
     # Set event to start today
     @event.update(start_time: Time.current.beginning_of_day + 21.hours)
 
-    assert_enqueued_with(job: EventReminderJob, args: [@event.id, 0]) do
+    assert_enqueued_with(job: EventReminderJob, args: [ @event.id, 0 ]) do
       EventReminderSchedulerJob.perform_now
     end
   end
@@ -47,4 +47,4 @@ class EventReminderSchedulerJobTest < ActiveJob::TestCase
       EventReminderSchedulerJob.perform_now
     end
   end
-end
+end