feat: add Usage Limits Panel component with usage tracking and visual indicators for limits

style: implement custom color schemes and gradients for account section, enhancing visual hierarchy

backend/igny8_core/celery.py

@@ -25,6 +25,15 @@ app.conf.beat_schedule = {
         'task': 'igny8_core.modules.billing.tasks.replenish_monthly_credits',
         'schedule': crontab(hour=0, minute=0, day_of_month=1),  # First day of month at midnight
     },
+    # Plan Limits Tasks
+    'reset-monthly-plan-limits': {
+        'task': 'reset_monthly_plan_limits',
+        'schedule': crontab(hour=0, minute=30),  # Daily at 00:30 to check for period end
+    },
+    'check-approaching-limits': {
+        'task': 'check_approaching_limits',
+        'schedule': crontab(hour=9, minute=0),  # Daily at 09:00 to warn users
+    },
     # Automation Tasks
     'check-scheduled-automations': {
         'task': 'automation.check_scheduled_automations',