feat: architectural grid editor fullPage + slash commands + doc info panel + AI title

memento-note/app/api/canvas/route.ts

@@ -1,7 +1,26 @@
 import { NextResponse } from 'next/server'
+import type { NextRequest } from 'next/server'
 import { prisma } from '@/lib/prisma'
 import { auth } from '@/auth'
-import { revalidatePath } from 'next/cache'
+
+export async function GET(req: NextRequest) {
+  const session = await auth()
+  if (!session?.user?.id) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+  }
+  const id = req.nextUrl.searchParams.get('id')
+  if (!id) {
+    return NextResponse.json({ error: 'Missing id' }, { status: 400 })
+  }
+  const canvas = await prisma.canvas.findFirst({
+    where: { id, userId: session.user.id },
+    select: { id: true, name: true, data: true, updatedAt: true },
+  })
+  if (!canvas) {
+    return NextResponse.json({ error: 'Not found' }, { status: 404 })
+  }
+  return NextResponse.json({ canvas })
+}
 
 export async function POST(req: Request) {
   try {