Add notification bell system and MOPC onboarding form

Notification System:
- Add InAppNotification and NotificationEmailSetting database models
- Create notification service with 60+ notification types for all user roles
- Add notification router with CRUD endpoints
- Build NotificationBell UI component with dropdown and unread count
- Integrate bell into admin, jury, mentor, and observer navs
- Add notification email settings admin UI in Settings > Notifications
- Add notification triggers to filtering router (complete/failed)
- Add sendNotificationEmail function to email library
- Add formatRelativeTime utility function

MOPC Onboarding Form:
- Create /apply landing page with auto-redirect for single form
- Create seed script for MOPC 2026 application form (6 steps)
- Create seed script for default notification email settings

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

src/components/settings/settings-content.tsx

@@ -17,6 +17,7 @@ import {
   HardDrive,
   Shield,
   Settings as SettingsIcon,
+  Bell,
 } from 'lucide-react'
 import { AISettingsForm } from './ai-settings-form'
 import { AIUsageCard } from './ai-usage-card'
@@ -25,6 +26,7 @@ import { EmailSettingsForm } from './email-settings-form'
 import { StorageSettingsForm } from './storage-settings-form'
 import { SecuritySettingsForm } from './security-settings-form'
 import { DefaultsSettingsForm } from './defaults-settings-form'
+import { NotificationSettingsForm } from './notification-settings-form'
 
 function SettingsSkeleton() {
   return (
@@ -108,7 +110,7 @@ export function SettingsContent({ initialSettings }: SettingsContentProps) {
 
   return (
     <Tabs defaultValue="ai" className="space-y-6">
-      <TabsList className="grid w-full grid-cols-2 lg:grid-cols-6">
+      <TabsList className="grid w-full grid-cols-3 lg:grid-cols-7">
         <TabsTrigger value="ai" className="gap-2">
           <Bot className="h-4 w-4" />
           <span className="hidden sm:inline">AI</span>
@@ -121,6 +123,10 @@ export function SettingsContent({ initialSettings }: SettingsContentProps) {
           <Mail className="h-4 w-4" />
           <span className="hidden sm:inline">Email</span>
         </TabsTrigger>
+        <TabsTrigger value="notifications" className="gap-2">
+          <Bell className="h-4 w-4" />
+          <span className="hidden sm:inline">Notifications</span>
+        </TabsTrigger>
         <TabsTrigger value="storage" className="gap-2">
           <HardDrive className="h-4 w-4" />
           <span className="hidden sm:inline">Storage</span>
@@ -178,6 +184,20 @@ export function SettingsContent({ initialSettings }: SettingsContentProps) {
         </Card>
       </TabsContent>
 
+      <TabsContent value="notifications">
+        <Card>
+          <CardHeader>
+            <CardTitle>Notification Email Settings</CardTitle>
+            <CardDescription>
+              Configure which notification types should also send email notifications
+            </CardDescription>
+          </CardHeader>
+          <CardContent>
+            <NotificationSettingsForm />
+          </CardContent>
+        </Card>
+      </TabsContent>
+
       <TabsContent value="storage">
         <Card>
           <CardHeader>