Rename plugins to automations and fix scheduler/payment bugs

Major changes:
- Rename "plugins" to "automations" throughout codebase
- Move automation system to dedicated app (scheduling/automations/)
- Add new automation marketplace, creation, and management pages

Bug fixes:
- Fix payment endpoint 500 errors (use has_feature() instead of attribute)
- Fix scheduler showing "0 AM" instead of "12 AM"
- Fix scheduler business hours double-inversion display issue
- Fix scheduler scroll-to-current-time when switching views
- Fix week view centering on wrong day (use Sunday-based indexing)
- Fix capacity widget overflow with many resources
- Fix Recharts minWidth/minHeight console warnings

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/pages/platform/PlatformDashboard.tsx

@@ -64,7 +64,7 @@ const PlatformDashboard: React.FC = () => {
       <div className="bg-white dark:bg-gray-800 p-6 rounded-xl border border-gray-200 dark:border-gray-700 shadow-sm">
         <h3 className="text-lg font-semibold text-gray-900 dark:text-white mb-6">{t('platform.mrrGrowth')}</h3>
         <div className="h-80 min-h-[320px]">
-          <ResponsiveContainer width="100%" height="100%">
+          <ResponsiveContainer width="100%" height="100%" minWidth={200} minHeight={200}>
             <AreaChart data={data}>
               <defs>
                 <linearGradient id="colorMrr" x1="0" y1="0" x2="0" y2="1">