chore: 统一本地服务器与远程仓库源码

- 合并 main 与 master 历史并以服务器结构为基线
- 保留迁移、数据保留、AWS 账单与部署安全能力
- 建立 SDD 规格和 CI 验证闭环

frontend/package.json

@@ -9,6 +9,7 @@
     "typecheck": "tsc --noEmit",
     "check": "npm run typecheck",
     "check:strict": "npm run lint && npm run typecheck",
+    "check:i18n": "node scripts/check-i18n-keys.mjs",
     "lint": "eslint .",
     "preview": "vite preview"
   },
@@ -67,9 +68,10 @@
     "react-i18next": "^17.0.8",
     "react-markdown": "^10.1.0",
     "react-resizable-panels": "^4.2.2",
-    "react-router-dom": "^7.13.2",
+    "react-router-dom": "^7.18.2",
     "recharts": "^2.15.4",
     "remark-gfm": "^4.0.1",
+    "simple-icons": "^16.27.0",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.4.0",
     "vaul": "^1.1.2",