feat(finalist): admin alerts on confirm/decline/expire/promote

Wire notifyAdmins() into finalist lifecycle events so admins receive
in-app (+ email when enabled) notifications on each key transition:
- finalist.confirm → FINALIST_CONFIRMED
- finalist.decline / adminDecline → FINALIST_DECLINED
- expirePendingPastDeadline (per row) → FINALIST_EXPIRED
- promoteNextWaitlistEntry + manualPromote → FINALIST_WAITLIST_PROMOTED

All calls are wrapped in try/catch — comms never throw inside a mutation
or cron (CLAUDE.md: "round notifications never throw"). Added project
title to the project select where it was missing.

Tests: tests/unit/finalist-comms.test.ts — 3 tests passing (TDD).
Regression: finalist-confirmation, finalist-admin-confirm,
finalist-enrollment — 30 tests all passing.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/server/routers/finalist.ts

@@ -9,6 +9,7 @@ import {
 } from '../services/finalist-confirmation'
 import {
   createNotification,
+  notifyAdmins,
   NotificationTypes,
 } from '../services/in-app-notification'
 import { sendFinalistConfirmationEmail } from '@/lib/email'
@@ -298,6 +299,7 @@ export const finalistRouter = router({
           project: {
             select: {
               id: true,
+              title: true,
               programId: true,
               program: { select: { defaultAttendeeCap: true } },
               teamMembers: { select: { userId: true } },
@@ -374,6 +376,22 @@ export const finalistRouter = router({
           attendingUserIds: input.attendingUserIds,
         },
       })
+      // Admin alert — best-effort, never throws
+      try {
+        await notifyAdmins({
+          type: NotificationTypes.FINALIST_CONFIRMED,
+          title: 'Finalist confirmed',
+          message: `"${confirmation.project.title}" (${confirmation.category}) has confirmed grand-finale attendance.`,
+          linkUrl: '/admin/logistics',
+          metadata: {
+            projectId: confirmation.projectId,
+            projectTitle: confirmation.project.title,
+            category: confirmation.category,
+          },
+        })
+      } catch (err) {
+        console.error('[finalist.confirm] failed to send admin notification:', err)
+      }
       return { ok: true }
     }),
 
@@ -390,7 +408,7 @@ export const finalistRouter = router({
       const payload = verifyFinalistToken(input.token)
       const confirmation = await ctx.prisma.finalistConfirmation.findUnique({
         where: { id: payload.confirmationId },
-        include: { project: { select: { programId: true } } },
+        include: { project: { select: { programId: true, title: true } } },
       })
       if (!confirmation) throw new TRPCError({ code: 'NOT_FOUND' })
       if (confirmation.token !== input.token) {
@@ -420,6 +438,22 @@ export const finalistRouter = router({
           reason: input.reason ?? null,
         },
       })
+      // Admin alert — best-effort, never throws
+      try {
+        await notifyAdmins({
+          type: NotificationTypes.FINALIST_DECLINED,
+          title: 'Finalist declined',
+          message: `"${confirmation.project.title}" (${confirmation.category}) has declined grand-finale attendance.`,
+          linkUrl: '/admin/logistics',
+          metadata: {
+            projectId: confirmation.projectId,
+            projectTitle: confirmation.project.title,
+            category: confirmation.category,
+          },
+        })
+      } catch (err) {
+        console.error('[finalist.decline] failed to send admin notification:', err)
+      }
 
       // Promote next waitlist entry in same category. windowHours pulled from
       // the live grand-finale round in the program (LIVE_FINAL roundType).
@@ -525,7 +559,7 @@ export const finalistRouter = router({
     .mutation(async ({ ctx, input }) => {
       const confirmation = await ctx.prisma.finalistConfirmation.findUniqueOrThrow({
         where: { id: input.confirmationId },
-        include: { project: { select: { programId: true } } },
+        include: { project: { select: { programId: true, title: true } } },
       })
       if (confirmation.status !== 'PENDING') {
         throw new TRPCError({
@@ -552,6 +586,22 @@ export const finalistRouter = router({
           reason: input.reason ?? null,
         },
       })
+      // Admin alert — best-effort, never throws
+      try {
+        await notifyAdmins({
+          type: NotificationTypes.FINALIST_DECLINED,
+          title: 'Finalist declined (admin)',
+          message: `"${confirmation.project.title}" (${confirmation.category}) was declined by an admin.`,
+          linkUrl: '/admin/logistics',
+          metadata: {
+            projectId: confirmation.projectId,
+            projectTitle: confirmation.project.title,
+            category: confirmation.category,
+          },
+        })
+      } catch (err) {
+        console.error('[finalist.adminDecline] failed to send admin notification:', err)
+      }
 
       const round = await ctx.prisma.round.findFirst({
         where: {
@@ -908,6 +958,23 @@ export const finalistRouter = router({
           windowHours: input.windowHours,
         },
       })
+      // Admin alert — best-effort, never throws
+      try {
+        const projectTitle = project?.title ?? entry.projectId
+        await notifyAdmins({
+          type: NotificationTypes.FINALIST_WAITLIST_PROMOTED,
+          title: 'Waitlist entry promoted',
+          message: `"${projectTitle}" (${entry.category}) was manually promoted from the waitlist.`,
+          linkUrl: '/admin/logistics',
+          metadata: {
+            projectId: entry.projectId,
+            projectTitle,
+            category: entry.category,
+          },
+        })
+      } catch (err) {
+        console.error('[finalist.manualPromote] failed to send admin notification:', err)
+      }
       return { confirmationId }
     }),