feat: migrate Canvas and Groups API to Prisma ORM

app/server/api/groups/index.post.ts

@@ -1,5 +1,5 @@
 import { requireAuth } from '~/server/utils/auth'
-import { groups, userGroups } from '~/server/utils/db'
+import { prisma } from '~/server/utils/prisma'
 
 export default defineEventHandler(async (event) => {
   const user = requireAuth(event)
@@ -10,17 +10,19 @@ export default defineEventHandler(async (event) => {
     throw createError({ statusCode: 400, message: 'Group name is required' })
   }
 
-  const id = `group-${Date.now()}-${Math.random().toString(36).slice(2, 6)}`
-  const now = new Date().toISOString()
-
-  const group = { id, name: name.trim(), description, isPublic, createdAt: now, updatedAt: now, ownerId: user.id }
-  groups.set(id, group)
-
-  userGroups.set(`${user.id}-${id}`, {
-    userId: user.id,
-    groupId: id,
-    role: 'admin',
-    joinedAt: now
+  const group = await prisma.group.create({
+    data: {
+      name: name.trim(),
+      description,
+      isPublic,
+      ownerId: user.id,
+      members: {
+        create: {
+          userId: user.id,
+          role: 'admin'
+        }
+      }
+    }
   })
 
   return { group }