Initial commit: Next.js scaffold, Request entity, Prisma+Zod, Tailwind v4+shadcn

- Next.js 14 (TS, App Router) monolith
- Request entity (Draft state) via Prisma + Postgres, validated with Zod
- ESLint configured
- Tailwind v4 + shadcn/ui (new-york-v4 style)
- Vitest test suite (6 tests, runs against throwaway Postgres DB per file)
- Multi-agent dev workflow docs in CLAUDE.md and .claude/agents/

prisma/schema.prisma

@@ -0,0 +1,40 @@
+// Prisma schema — source of truth for the DB schema going forward,
+// replacing the hand-written `CREATE TABLE IF NOT EXISTS` migration that
+// used to live in src/lib/db.ts. Only the Request entity (Draft state only)
+// exists so far — see ../processes/asset-license-management.md for the full
+// data model / state machine this will grow into.
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+// Fixed, closed set of 2 values tied to the domain (asset vs license
+// request) — a native Postgres enum is the idiomatic Prisma mapping here.
+// This replaces the old `type TEXT NOT NULL CHECK (type IN ('asset',
+// 'license'))` column with `type "RequestType" NOT NULL` backed by a
+// `CREATE TYPE "RequestType" AS ENUM ('asset', 'license')`. Same validation
+// guarantee (only these two values are ever storable), different mechanism.
+// See feature-implementer report for the enum-vs-TEXT+CHECK trade-off.
+enum RequestType {
+  asset
+  license
+}
+
+model Request {
+  id         String      @id @default(uuid()) @db.Uuid
+  employeeId String      @map("employee_id")
+  type       RequestType
+  reason     String
+  // Only the 'Draft' state is implemented so far. Deliberately kept as a
+  // plain string (not an enum) until more states exist — see
+  // src/lib/requests.ts's RequestStatus type.
+  status     String      @default("Draft")
+  createdAt  DateTime    @default(now()) @map("created_at") @db.Timestamptz(6)
+
+  @@map("requests")
+}