fix sort and filter

src/server/api/schemas/comment.ts

@@ -0,0 +1,21 @@
+/**
+ * Comment API Validation Schemas
+ *
+ * Zod schemas for comment-related tRPC procedures:
+ * - Comment sorting validation
+ */
+
+import { z } from "zod";
+
+// ============================================================================
+// Comment Sorting
+// ============================================================================
+
+/**
+ * Valid comment sorting modes
+ */
+export const commentSortSchema = z
+  .enum(["newest", "oldest", "highest_rated", "hot"])
+  .default("newest");
+
+export type CommentSortMode = z.infer<typeof commentSortSchema>;