fix(workflows): clear folderId on restore when folder is archived or missing

When individually restoring a workflow from Recently Deleted, check if
its folder still exists and is active. If the folder is archived or
missing, clear folderId so the workflow appears at root instead of
being orphaned (invisible in sidebar).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/lib/workflows/lifecycle.ts

@@ -6,6 +6,7 @@ import {
   webhook,
   workflow,
   workflowDeploymentVersion,
+  workflowFolder,
   workflowMcpTool,
   workflowSchedule,
 } from '@sim/db/schema'
@@ -258,12 +259,28 @@ export async function restoreWorkflow(
     }
   }
 
+  let clearFolderId = false
+  if (existingWorkflow.folderId) {
+    const [folder] = await db
+      .select({ archivedAt: workflowFolder.archivedAt })
+      .from(workflowFolder)
+      .where(eq(workflowFolder.id, existingWorkflow.folderId))
+
+    if (!folder || folder.archivedAt) {
+      clearFolderId = true
+    }
+  }
+
   const now = new Date()
 
   await db.transaction(async (tx) => {
     await tx
       .update(workflow)
-      .set({ archivedAt: null, updatedAt: now })
+      .set({
+        archivedAt: null,
+        updatedAt: now,
+        ...(clearFolderId && { folderId: null }),
+      })
       .where(eq(workflow.id, workflowId))
 
     await tx