feat: wire up notification system in server

server/src/routes/user/notifications.js

@@ -0,0 +1,38 @@
+import { prisma } from '../../lib/prisma.js'
+import { ensureUserNotificationPreference } from '../../lib/notifications/preferences.js'
+
+export async function registerUserNotificationRoutes(fastify) {
+  fastify.get(
+    '/api/me/notifications/settings',
+    { preHandler: [fastify.authenticate] },
+    async (request) => {
+      const userId = request.user.sub
+      const prefs = await ensureUserNotificationPreference(userId)
+      return { settings: prefs }
+    },
+  )
+
+  fastify.put(
+    '/api/me/notifications/settings',
+    { preHandler: [fastify.authenticate] },
+    async (request) => {
+      const userId = request.user.sub
+      const body = request.body || {}
+
+      const data = {}
+      if ('globalEnabled' in body) data.globalEnabled = Boolean(body.globalEnabled)
+      if ('orderCreated' in body) data.orderCreated = Boolean(body.orderCreated)
+      if ('orderStatusChanged' in body) data.orderStatusChanged = Boolean(body.orderStatusChanged)
+      if ('orderMessageReceived' in body) data.orderMessageReceived = Boolean(body.orderMessageReceived)
+      if ('paymentStatusChanged' in body) data.paymentStatusChanged = Boolean(body.paymentStatusChanged)
+
+      const prefs = await prisma.notificationPreference.upsert({
+        where: { userId },
+        create: { userId, ...data },
+        update: data,
+      })
+
+      return { settings: prefs }
+    },
+  )
+}