refactor(db): simplify to single prisma schema workflow

packages/db/package.json

@@ -10,7 +10,6 @@
     "build": "tsc -p tsconfig.json",
     "lint": "biome check src prisma/seed.ts",
     "typecheck": "tsc -p tsconfig.json --noEmit",
-    "db:auth:generate": "mkdir -p prisma/generated && set -a && . ../../.env && set +a && bunx @better-auth/cli@1.4.18 generate --config prisma/better-auth.config.ts --output prisma/generated/better-auth.prisma --yes",
     "db:generate": "bun --env-file=../../.env prisma generate",
     "db:migrate": "bun --env-file=../../.env prisma migrate dev --name init",
     "db:migrate:named": "bun --env-file=../../.env prisma migrate dev",
@@ -30,7 +29,6 @@
     "@biomejs/biome": "2.3.14",
     "@types/node": "25.2.2",
     "@types/pg": "8.16.0",
-    "better-auth": "1.4.18",
     "prisma": "7.3.0",
     "typescript": "5.9.3"
   },

packages/db/prisma/better-auth.config.ts

@@ -1,37 +0,0 @@
-import { betterAuth } from "better-auth"
-import { prismaAdapter } from "better-auth/adapters/prisma"
-import { db } from "../src/client"
-
-const adminOrigin = process.env.CMS_ADMIN_ORIGIN ?? "http://localhost:3001"
-const webOrigin = process.env.CMS_WEB_ORIGIN ?? "http://localhost:3000"
-const registrationFlag = process.env.CMS_ADMIN_REGISTRATION_ENABLED
-
-export const auth = betterAuth({
-  appName: "CMS Admin",
-  baseURL: process.env.BETTER_AUTH_URL ?? adminOrigin,
-  secret: process.env.BETTER_AUTH_SECRET ?? "dev-only-change-me-for-production",
-  trustedOrigins: [adminOrigin, webOrigin],
-  database: prismaAdapter(db, {
-    provider: "postgresql",
-  }),
-  emailAndPassword: {
-    enabled: true,
-    disableSignUp: registrationFlag === "false",
-  },
-  user: {
-    additionalFields: {
-      role: {
-        type: "string",
-        required: true,
-        defaultValue: "editor",
-        input: false,
-      },
-      isBanned: {
-        type: "boolean",
-        required: true,
-        defaultValue: false,
-        input: false,
-      },
-    },
-  },
-})

packages/db/prisma/generated/better-auth.prisma

@@ -1,74 +0,0 @@
-
-generator client {
-  provider = "prisma-client-js"
-}
-
-datasource db {
-  provider = "postgresql"
-  url      = env("DATABASE_URL")
-}
-
-model User {
-  id            String    @id
-  name          String
-  email         String
-  emailVerified Boolean   @default(false)
-  image         String?
-  createdAt     DateTime  @default(now())
-  updatedAt     DateTime  @updatedAt
-  role          String    @default("editor")
-  isBanned      Boolean   @default(false)
-  sessions      Session[]
-  accounts      Account[]
-
-  @@unique([email])
-  @@map("user")
-}
-
-model Session {
-  id        String   @id
-  expiresAt DateTime
-  token     String
-  createdAt DateTime @default(now())
-  updatedAt DateTime @updatedAt
-  ipAddress String?
-  userAgent String?
-  userId    String
-  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
-
-  @@unique([token])
-  @@index([userId])
-  @@map("session")
-}
-
-model Account {
-  id                    String    @id
-  accountId             String
-  providerId            String
-  userId                String
-  user                  User      @relation(fields: [userId], references: [id], onDelete: Cascade)
-  accessToken           String?
-  refreshToken          String?
-  idToken               String?
-  accessTokenExpiresAt  DateTime?
-  refreshTokenExpiresAt DateTime?
-  scope                 String?
-  password              String?
-  createdAt             DateTime  @default(now())
-  updatedAt             DateTime  @updatedAt
-
-  @@index([userId])
-  @@map("account")
-}
-
-model Verification {
-  id         String   @id
-  identifier String
-  value      String
-  expiresAt  DateTime
-  createdAt  DateTime @default(now())
-  updatedAt  DateTime @updatedAt
-
-  @@index([identifier])
-  @@map("verification")
-}

packages/db/prisma/schema.prisma

@@ -1,5 +1,6 @@
 generator client {
-  provider = "prisma-client-js"
+  provider = "prisma-client"
+  output   = "./generated/client"
 }
 
 datasource db {

packages/db/src/client.ts

@@ -1,6 +1,6 @@
 import { PrismaPg } from "@prisma/adapter-pg"
-import { PrismaClient } from "@prisma/client"
 import { Pool } from "pg"
+import { PrismaClient } from "../prisma/generated/client/client"
 
 const connectionString = process.env.DATABASE_URL