Add read-only Noya admin panel with assignments and UX polish.

Ship admin auth, user overview, assessments, chats, assignment filters/export, security hardening, and a separate desktop admin shell with clearer assessment answers.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/package.json

@@ -16,6 +16,7 @@
     "prisma:migrate:dev": "prisma migrate dev --schema=./prisma/schema.prisma",
     "prisma:migrate:deploy": "prisma migrate deploy --schema=./prisma/schema.prisma",
     "prisma:seed": "prisma db seed --schema=./prisma/schema.prisma",
+    "admin:promote": "tsx scripts/promote-admin.ts",
     "postinstall": "npm run prisma:generate"
   },
   "prisma": {
@@ -26,6 +27,7 @@
     "@hono/zod-validator": "^0.5.0",
     "@node-rs/argon2": "^2.1.0",
     "@prisma/client": "^6.10.1",
+    "exceljs": "^4.4.0",
     "hono": "^4.7.11",
     "hono-rate-limiter": "^0.4.2",
     "pino": "^9.7.0",