feat: migrate Canvas and Groups API to Prisma ORM

app/server/api/canvas/index.get.ts

@@ -1,34 +1,41 @@
 import { requireAuth } from '~/server/utils/auth'
-import { canvases, userGroups } from '~/server/utils/db'
+import { prisma } from '~/server/utils/prisma'
 
 export default defineEventHandler(async (event) => {
   const user = requireAuth(event)
 
-  // Get all canvases the user can access
-  const userGroupIds = Array.from(userGroups.values())
-    .filter(membership => membership.userId === user.id)
-    .map(membership => membership.groupId)
+  const userGroups = await prisma.groupMember.findMany({
+    where: { userId: user.id },
+    select: { groupId: true }
+  })
+  const groupIds = userGroups.map(m => m.groupId)
 
-  const accessibleCanvases = Array.from(canvases.values()).filter(canvas => {
-    // User can see their own canvases
-    if (canvas.ownerId === user.id) return true
-    // User can see public canvases
-    if (canvas.isPublic) return true
-    // User can see group canvases they're a member of
-    if (canvas.groupId && userGroupIds.includes(canvas.groupId)) return true
-    return false
+  const canvasList = await prisma.canvas.findMany({
+    where: {
+      OR: [
+        { ownerId: user.id },
+        { isPublic: true },
+        { groupId: { in: groupIds } }
+      ]
+    },
+    select: {
+      id: true,
+      name: true,
+      ownerId: true,
+      groupId: true,
+      isPublic: true,
+      createdAt: true,
+      updatedAt: true,
+      nodes: true
+    },
+    orderBy: { updatedAt: 'desc' }
   })
 
-  const canvasList = accessibleCanvases.map(canvas => ({
-    id: canvas.id,
-    name: canvas.name,
-    ownerId: canvas.ownerId,
-    createdAt: canvas.createdAt,
-    updatedAt: canvas.updatedAt,
-    isPublic: canvas.isPublic,
-    groupId: canvas.groupId,
-    nodeCount: canvas.nodes.length
-  }))
-
-  return { canvases: canvasList }
+  return {
+    canvases: canvasList.map(c => ({
+      ...c,
+      nodeCount: Array.isArray(c.nodes) ? (c.nodes as any[]).length : 0,
+      nodes: undefined
+    }))
+  }
 })