Initial commit: DrinkTracker full-stack app

Next.js 14 drink collection tracker with AI-powered search,
menu scanning, ratings, wishlist, sharing, and CSV backup/restore.

Features:
- Auth (credentials + OAuth ready)
- Drink collection with ratings and reviews
- AI search via Claude/OpenAI with search history
- Menu photo scanning with AI extraction
- Wishlist / Try Later system
- Public sharing via slug URLs
- CSV backup and restore (merge/replace modes)
- Docker Compose for Postgres + MinIO + dev server

Security: docker-compose files use env var interpolation
instead of hardcoded secrets.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/api/auth/register/route.ts

@@ -0,0 +1,64 @@
+import { NextResponse } from "next/server"
+import { z } from "zod"
+import bcrypt from "bcryptjs"
+import { prisma } from "@/lib/prisma"
+
+const registerSchema = z.object({
+  name: z
+    .string()
+    .min(1, "Name is required")
+    .max(100, "Name must be 100 characters or less"),
+  email: z
+    .string()
+    .min(1, "Email is required")
+    .email("Invalid email address"),
+  password: z
+    .string()
+    .min(8, "Password must be at least 8 characters"),
+})
+
+export async function POST(request: Request) {
+  try {
+    const body = await request.json()
+    const result = registerSchema.safeParse(body)
+
+    if (!result.success) {
+      const errors = result.error.flatten().fieldErrors
+      return NextResponse.json(
+        { error: "Validation failed", details: errors },
+        { status: 400 }
+      )
+    }
+
+    const { name, email, password } = result.data
+
+    const existingUser = await prisma.user.findUnique({ where: { email } })
+    if (existingUser) {
+      return NextResponse.json(
+        { error: "An account with this email already exists" },
+        { status: 409 }
+      )
+    }
+
+    const hashedPassword = await bcrypt.hash(password, 10)
+
+    const user = await prisma.user.create({
+      data: {
+        name,
+        email,
+        password: hashedPassword,
+        emailVerified: new Date(),
+      },
+    })
+
+    return NextResponse.json(
+      { id: user.id, name: user.name, email: user.email },
+      { status: 201 }
+    )
+  } catch {
+    return NextResponse.json(
+      { error: "Something went wrong. Please try again." },
+      { status: 500 }
+    )
+  }
+}