完善论坛配置与发帖体验：TipTap 富文本、图片上传、修订历史、Feed 排序与后台参数管理。

同步更新 README 与 ROADMAP，反映最新功能与开发状态。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/package-lock.json

@@ -31,9 +31,7 @@
         "diff": "^9.0.0",
         "dompurify": "^3.4.10",
         "lucide-react": "^1.18.0",
-        "marked": "^18.0.5",
         "postcss": "^8.5.15",
-        "react": "^18.3.1",
         "react-dom": "^18.3.1",
         "react-hook-form": "^7.79.0",
         "react-router-dom": "^6.28.0",
@@ -3181,18 +3179,6 @@
         "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
       }
     },
-    "node_modules/marked": {
-      "version": "18.0.5",
-      "resolved": "https://registry.npmjs.org/marked/-/marked-18.0.5.tgz",
-      "integrity": "sha512-S6GcvALHg6K4ohtu4E7x0a1AqhAjp6cV8KhLSyN9qVapnzJkusVBxZRcIU9AeYsbe6P1hKDusSbEOzGyyuce6w==",
-      "license": "MIT",
-      "bin": {
-        "marked": "bin/marked.js"
-      },
-      "engines": {
-        "node": ">= 20"
-      }
-    },
     "node_modules/merge2": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz",
@@ -3655,6 +3641,7 @@
       "resolved": "https://registry.npmjs.org/react/-/react-18.3.1.tgz",
       "integrity": "sha512-wS+hAgJShR0KhEvPJArfuPVN1+Hz1t0Y6n5jLrGQbkb4urgPE/0Rve+1kMB1v/oWgHgm4WIcV+i7F2pTVj+2iQ==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "loose-envify": "^1.1.0"
       },