Revert "Unify code style"

This reverts commit b683865.

Author: xuyaqist

.editorconfig

@@ -1,7 +1,6 @@
 {
-  "extends": ["next/core-web-vitals", "next/typescript", "prettier"],
-  "plugins": ["prettier"],
-  "rules": {
-    "prettier/prettier": "error"
-  }
+  "extends": [
+    "next/core-web-vitals",
+    "next/typescript"
+  ]
 }

frontend/.eslintrc.json

@@ -7,11 +7,8 @@
     "build": "next build",
     "start": "NODE_ENV=production node server.js",
     "lint": "next lint",
-    "lint:fix": "next lint --fix",
-    "format": "prettier --write .",
-    "format:check": "prettier --check .",
     "type-check": "tsc --noEmit",
-    "check-all": "npm run type-check && npm run lint && npm run format:check && npm run build"
+    "check-all": "npm run type-check && npm run lint && npm run build"
   },
   "dependencies": {
     "@ant-design/icons": "^6.0.0",
@@ -64,7 +61,7 @@
     "katex": "^0.16.11",
     "lucide-react": "^0.454.0",
     "mermaid": "^11.12.0",
-    "next": "^15.5.9",
+    "next": "15.5.7",
     "next-i18next": "^15.4.2",
     "next-themes": "^0.4.4",
     "react": "18.2.0",
@@ -78,7 +75,7 @@
     "react-markdown": "^8.0.7",
     "react-organizational-chart": "^2.2.1",
     "react-resizable-panels": "^2.1.7",
-    "react-syntax-highlighter": "^16.1.0",
+    "react-syntax-highlighter": "^15.5.0",
     "reactflow": "^11.11.4",
     "recharts": "2.15.0",
     "rehype-katex": "^6.0.3",
@@ -101,10 +98,7 @@
     "@types/react-dom": "18.3.6",
     "eslint": "^9.34.0",
     "eslint-config-next": "15.5.7",
-    "eslint-config-prettier": "^9.1.0",
-    "eslint-plugin-prettier": "^5.1.3",
     "postcss": "^8",
-    "prettier": "^3.2.5",
     "tailwindcss": "^3.4.17",
     "typescript": "5.8.3"
   }