Add styled notification emails and round-attached notifications

- Add 15+ styled email templates matching existing invite email design
- Wire up notification triggers in all routers (assignment, round, project, mentor, application, onboarding)
- Add test email button for each notification type in admin settings
- Add round-attached notifications: admins can configure which notification to send when projects enter a round
- Fall back to status-based notifications when round has no configured notification

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

src/server/routers/application.ts

@@ -2,6 +2,11 @@ import { z } from 'zod'
 import { TRPCError } from '@trpc/server'
 import { router, publicProcedure } from '../trpc'
 import { CompetitionCategory, OceanIssue, TeamMemberRole } from '@prisma/client'
+import {
+  createNotification,
+  notifyAdmins,
+  NotificationTypes,
+} from '../services/in-app-notification'
 
 // Zod schemas for the application form
 const teamMemberSchema = z.object({
@@ -308,6 +313,35 @@ export const applicationRouter = router({
         },
       })
 
+      // Notify applicant of successful submission
+      await createNotification({
+        userId: user.id,
+        type: NotificationTypes.APPLICATION_SUBMITTED,
+        title: 'Application Received',
+        message: `Your application for "${data.projectName}" has been successfully submitted to ${round.program.name}.`,
+        linkUrl: `/team/projects/${project.id}`,
+        linkLabel: 'View Application',
+        metadata: {
+          projectName: data.projectName,
+          programName: round.program.name,
+        },
+      })
+
+      // Notify admins of new application
+      await notifyAdmins({
+        type: NotificationTypes.NEW_APPLICATION,
+        title: 'New Application',
+        message: `New application received: "${data.projectName}" from ${data.contactName}.`,
+        linkUrl: `/admin/projects/${project.id}`,
+        linkLabel: 'Review Application',
+        metadata: {
+          projectName: data.projectName,
+          applicantName: data.contactName,
+          applicantEmail: data.contactEmail,
+          programName: round.program.name,
+        },
+      })
+
       return {
         success: true,
         projectId: project.id,