fix: TypeScript 타입 오류 수정 및 설정 페이지 추가

- BOMItem Omit 타입 시그니처 통일 (useTemplateManagement, SectionsTab, ItemMasterContext)
- HeadersInit → Record<string, string> 타입 변경
- Zustand useShallow 마이그레이션 (zustand/react/shallow)
- DataTable, ListPageTemplate 제네릭 타입 제약 추가
- 설정 관리 페이지 추가 (직급, 직책, 휴가정책, 근무일정, 권한)
- HR 관리 페이지 추가 (급여, 휴가)
- 단가관리 페이지 리팩토링

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/ui/scroll-area.tsx

@@ -0,0 +1,52 @@
+"use client";
+
+import * as React from "react";
+import * as ScrollAreaPrimitive from "@radix-ui/react-scroll-area";
+
+import { cn } from "./utils";
+
+function ScrollArea({
+  className,
+  children,
+  ...props
+}: React.ComponentProps<typeof ScrollAreaPrimitive.Root>) {
+  return (
+    <ScrollAreaPrimitive.Root
+      data-slot="scroll-area"
+      className={cn("relative overflow-hidden", className)}
+      {...props}
+    >
+      <ScrollAreaPrimitive.Viewport className="h-full w-full rounded-[inherit]">
+        {children}
+      </ScrollAreaPrimitive.Viewport>
+      <ScrollBar />
+      <ScrollAreaPrimitive.Corner />
+    </ScrollAreaPrimitive.Root>
+  );
+}
+
+function ScrollBar({
+  className,
+  orientation = "vertical",
+  ...props
+}: React.ComponentProps<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>) {
+  return (
+    <ScrollAreaPrimitive.ScrollAreaScrollbar
+      data-slot="scroll-bar"
+      orientation={orientation}
+      className={cn(
+        "flex touch-none select-none transition-colors",
+        orientation === "vertical" &&
+          "h-full w-2.5 border-l border-l-transparent p-[1px]",
+        orientation === "horizontal" &&
+          "h-2.5 flex-col border-t border-t-transparent p-[1px]",
+        className
+      )}
+      {...props}
+    >
+      <ScrollAreaPrimitive.ScrollAreaThumb className="relative flex-1 rounded-full bg-border" />
+    </ScrollAreaPrimitive.ScrollAreaScrollbar>
+  );
+}
+
+export { ScrollArea, ScrollBar };