feat: drag and drop for files, code redactor in task + competition session decomposed

services/frontend/package.json

@@ -10,6 +10,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@monaco-editor/react": "^4.7.0",
     "@radix-ui/react-dialog": "^1.1.6",
     "@radix-ui/react-slot": "^1.1.2",
     "@radix-ui/react-tabs": "^1.1.3",
@@ -17,13 +18,18 @@
     "autoprefixer": "^10.4.20",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "katex": "^0.16.21",
     "lucide-react": "^0.476.0",
+    "monaco-editor": "^0.52.2",
     "ofetch": "^1.4.1",
     "postcss": "^8.5.3",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
+    "react-markdown": "^10.0.0",
     "react-router": "^7.2.0",
     "react-router-dom": "^7.2.0",
+    "rehype-katex": "^7.0.1",
+    "remark-math": "^6.0.0",
     "tailwind-merge": "^3.0.2",
     "tailwindcss": "^4.0.9",
     "tailwindcss-animate": "^1.0.7",