feat: restructure into XFlow monorepo with Nuxt 4, Modular Onion Monolith, Android client, and Desktop CLI

apps/web/server/api/canvas/index.post.ts

@@ -0,0 +1,32 @@
+import { requireAuth } from '~/server/utils/auth'
+import { prisma } from '~/server/utils/prisma'
+
+export default defineEventHandler(async (event) => {
+  const user = requireAuth(event)
+  const body = await readBody(event)
+  const { name = 'New Canvas', nodes = [], edges = [], isPublic = false, groupId } = body
+
+  if (groupId) {
+    const membership = await prisma.groupMember.findUnique({
+      where: { userId_groupId: { userId: user.id, groupId } }
+    })
+    if (!membership) {
+      throw createError({ statusCode: 403, message: 'Not a member of this group' })
+    }
+  }
+
+  const id = `canvas-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`
+  const canvas = await prisma.canvas.create({
+    data: {
+      id,
+      name,
+      nodes,
+      edges,
+      isPublic,
+      ownerId: user.id,
+      groupId: groupId || null
+    }
+  })
+
+  return { canvas }
+})