diff --git a/src/routes/cases.index.tsx b/src/routes/cases.index.tsx
index 487f278..d248a91 100644
--- a/src/routes/cases.index.tsx
+++ b/src/routes/cases.index.tsx
@@ -395,9 +395,25 @@ function CasesList() {
           <Button size="sm" onClick={bulkAssignStatus} disabled={busy || !assignStatus}>
             Apply
           </Button>
+          <div className="mx-2 h-5 w-px bg-border" />
+          <Button
+            size="sm"
+            variant="outline"
+            onClick={() => setBulkCollectionsOpen(true)}
+            disabled={busy}
+          >
+            <Users className="h-4 w-4 mr-2" /> Designate as collections
+          </Button>
         </div>
       )}
 
+      <BulkConvertToCollectionsDialog
+        open={bulkCollectionsOpen}
+        onOpenChange={setBulkCollectionsOpen}
+        cases={cases.filter((c) => selected.has(c.id))}
+        onCreated={() => { setSelected(new Set()); load(); }}
+      />
+
       <Card className="border-border/60 overflow-hidden">
         <CardContent className="p-0">
           <table className="w-full text-sm">