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

package.json

@@ -24,6 +24,8 @@
     "@radix-ui/react-collapsible": "^1.1.12",
     "@radix-ui/react-dialog": "^1.1.15",
     "@radix-ui/react-dropdown-menu": "^2.1.16",
+    "@radix-ui/react-progress": "^1.1.8",
+    "@radix-ui/react-radio-group": "^1.3.8",
     "@radix-ui/react-scroll-area": "^1.2.10",
     "@radix-ui/react-select": "^2.2.6",
     "@radix-ui/react-separator": "^1.1.8",
@@ -33,6 +35,10 @@
     "@t3-oss/env-nextjs": "^0.13.10",
     "@tanstack/react-query": "^5.90.12",
     "@tanstack/react-table": "^8.21.3",
+    "@tiptap/extension-placeholder": "^3.15.3",
+    "@tiptap/pm": "^3.15.3",
+    "@tiptap/react": "^3.15.3",
+    "@tiptap/starter-kit": "^3.15.3",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "drizzle-orm": "^0.45.1",
@@ -52,6 +58,7 @@
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.4.0",
     "tailwindcss-animate": "^1.0.7",
+    "tiptap-markdown": "^0.9.0",
     "zod": "^4.2.1",
     "zustand": "^5.0.9"
   },