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

apps/web/server/api/canvas/[id].get.ts

@@ -0,0 +1,31 @@
+import { requireAuth } from '~/server/utils/auth'
+import { prisma } from '~/server/utils/prisma'
+
+export default defineEventHandler(async (event) => {
+  const id = getRouterParam(event, 'id')
+  if (!id) throw createError({ statusCode: 400, message: 'Canvas ID is required' })
+
+  const canvas = await prisma.canvas.findUnique({ where: { id } })
+  if (!canvas) throw createError({ statusCode: 404, message: 'Canvas not found' })
+
+  let user = { id: null, role: 'guest' } as any
+  try {
+    user = requireAuth(event)
+  } catch (e) {}
+
+  // Определение роли
+  let userRole = 'viewer'
+  if (user.id === canvas.ownerId) userRole = 'owner'
+  else if (user.role === 'admin') userRole = 'admin'
+  else if (canvas.groupId) {
+    const membership = user.id ? await prisma.groupMember.findUnique({
+      where: { userId_groupId: { userId: user.id as string, groupId: canvas.groupId } }
+    }) : null
+    if (membership) userRole = membership.role
+    else if (!canvas.isPublic) throw createError({ statusCode: 403, message: 'Access denied' })
+  } else if (!canvas.isPublic) {
+    throw createError({ statusCode: 403, message: 'Access denied' })
+  }
+
+  return { canvas, role: userRole }
+})