refactor: organize supply frontend structure

src/shared/ai-elements/prompt-input.tsx

@@ -1,5 +1,3 @@
-"use client";
-
 import {
   Command,
   CommandEmpty,
@@ -39,7 +37,7 @@ import {
   TooltipContent,
   TooltipTrigger,
 } from "@/shared/ui/tooltip";
-import { cn } from "@/lib/utils";
+import { cn } from "@/shared/ui/cn";
 import type { ChatStatus, FileUIPart, SourceDocumentUIPart } from "ai";
 import {
   CornerDownLeftIcon,