fix: Dashboard 역할 전환 시 컨텐츠 즉시 반영 기능 추가

- userRole을 정적 변수에서 useState로 변경하여 reactive state로 전환
- useEffect로 storage 및 roleChanged 이벤트 리스너 추가
- localStorage 변경 감지 시 자동 리렌더링 구현
- SystemAdmin, CEO, ProductionManager, Worker 역할별 대시보드 동적 렌더링

src/components/business/Dashboard.tsx

@@ -1,4 +1,4 @@
-import { useState } from "react";
+import { useState, useEffect } from "react";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
@@ -60,10 +60,32 @@ import { Checkbox } from "@/components/ui/checkbox";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 
 export function Dashboard() {
-  // Get user role from localStorage
-  const userDataStr = localStorage.getItem("user");
-  const userData = userDataStr ? JSON.parse(userDataStr) : null;
-  const userRole = userData?.role || "CEO"; // Default to CEO if not found
+  // Get user role from localStorage and make it reactive
+  const [userRole, setUserRole] = useState<string>(() => {
+    const userDataStr = localStorage.getItem("user");
+    const userData = userDataStr ? JSON.parse(userDataStr) : null;
+    return userData?.role || "CEO";
+  });
+
+  // Listen for storage changes to update role dynamically
+  useEffect(() => {
+    const handleStorageChange = () => {
+      const userDataStr = localStorage.getItem("user");
+      const userData = userDataStr ? JSON.parse(userDataStr) : null;
+      const newRole = userData?.role || "CEO";
+      setUserRole(newRole);
+    };
+
+    // Listen to custom storage event
+    window.addEventListener('storage', handleStorageChange);
+    // Listen to custom role change event
+    window.addEventListener('roleChanged', handleStorageChange);
+
+    return () => {
+      window.removeEventListener('storage', handleStorageChange);
+      window.removeEventListener('roleChanged', handleStorageChange);
+    };
+  }, []);
 
   // 시스템관리자인 경우 SystemAdminDashboard 렌더링
   if (userRole === "SystemAdmin") {