MVP

backend/prisma/migrations/20251122021659_init/migration.sql

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+-- CreateTable
+CREATE TABLE "Collection" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "name" TEXT NOT NULL,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL
+);
+
+-- CreateTable
+CREATE TABLE "Drawing" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "name" TEXT NOT NULL,
+    "elements" TEXT NOT NULL,
+    "appState" TEXT NOT NULL,
+    "version" INTEGER NOT NULL DEFAULT 1,
+    "collectionId" TEXT,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "Drawing_collectionId_fkey" FOREIGN KEY ("collectionId") REFERENCES "Collection" ("id") ON DELETE SET NULL ON UPDATE CASCADE
+);

backend/prisma/migrations/migration_lock.toml

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+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "sqlite"

backend/prisma/schema.prisma

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+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+  output   = "../src/generated/client"
+}
+
+datasource db {
+  provider = "sqlite"
+  url      = env("DATABASE_URL")
+}
+
+model Collection {
+  id        String    @id @default(uuid())
+  name      String
+  drawings  Drawing[]
+  createdAt DateTime  @default(now())
+  updatedAt DateTime  @updatedAt
+}
+
+model Drawing {
+  id           String      @id @default(uuid())
+  name         String
+  elements     String // Stored as JSON string
+  appState     String // Stored as JSON string
+  version      Int         @default(1)
+  collectionId String?
+  collection   Collection? @relation(fields: [collectionId], references: [id])
+  createdAt    DateTime    @default(now())
+  updatedAt    DateTime    @updatedAt
+}