feat(classes): optimize teacher dashboard ui and implement grade management

src/modules/layout/config/navigation.ts

@@ -12,7 +12,8 @@ import {
   FileQuestion,
   ClipboardList,
   Library,
-  PenTool
+  PenTool,
+  Briefcase
 } from "lucide-react"
 import type { LucideIcon } from "lucide-react"
 
@@ -124,7 +125,14 @@ export const NAV_CONFIG: Record<Role, NavItem[]> = {
         { title: "Students", href: "/teacher/classes/students" },
         { title: "Schedule", href: "/teacher/classes/schedule" },
         { title: "Insights", href: "/teacher/classes/insights" },
-        { title: "Grade Insights", href: "/teacher/grades/insights" },
+      ]
+    },
+    {
+      title: "Management",
+      icon: Briefcase,
+      href: "/management",
+      items: [
+        { title: "Grade Insights", href: "/management/grade/insights" },
       ]
     },
   ],