feat: prisma schema, groups API, deploy workflow

app/server/api/canvas/[id].put.ts

@@ -0,0 +1,24 @@
+import { requireAuth } from '~/server/utils/auth'
+import { canvases } from '~/server/utils/db'
+
+export default defineEventHandler(async (event) => {
+  requireAuth(event)
+  const id = getRouterParam(event, 'id')
+  const body = await readBody(event)
+
+  const existing = canvases.get(id || '')
+  if (!existing) {
+    throw createError({ statusCode: 404, message: 'Canvas not found' })
+  }
+
+  const updated = {
+    ...existing,
+    ...body,
+    id: existing.id,
+    updatedAt: new Date().toISOString()
+  }
+
+  canvases.set(id || '', updated)
+
+  return { canvas: updated }
+})