feat(admin): 官网落地页融进 admin —— / 是官网、/admin 是运维后台

用户要 agent.sundynix.cn/ 打开是营销官网、/admin 是后台,且只用一个前端。
把 sundynix-site/web 的营销落地页融进 sundynix-admin 这一个 Vite 工程(不挂两份 embed):

- 拷官网到 src/site/:home(hero/功能/架构/快速上手/下载)+layout(header/footer)
  +terminal-demo/logo/reveal 等 + content/site.ts(文案本就是本产品)。去掉博客/posts/埋点/RSS
  (营销 only,零后端改动);use-release 改纯静态版本号。public/ 加 brand logo+favicon。
- Tailwind v4→v3 对齐:site 的 ink/ground/accent/term 等 token 加进 tailwind.config(var 引用)
  + :root/.dark 变量+keyframes 进 index.css;bg-ground/85 用 color-mix 还原。admin 自身用默认
  gray/violet 调色板,不冲突;landing 的 bg-ground 只作用在 SiteLayout 容器、不改 body。
- 路由重构:App.tsx 换 BrowserRouter —— / 官网(公开)、/admin/* 后台(AdminGate 内做 me/Login/AppShell)。
  routes.tsx path 改相对、AppShell 链接加 /admin 前缀。@ 别名指向 src/site。
- gateway/Dockerfile/nginx 零改动:单份 dist 挂根 + NoRoute SPA 兜底已支持 BrowserRouter 深链。

验证:tsc + vite build(Tailwind 编译过)+ vitest 41 过;gateway 二进制冒烟打真 serve——
/ 返回官网 index.html、/admin 与 /admin/tasks SPA 兜底 200、/brand/*.webp 200、/api/v1 走 API 401;
dist 里确认落地页文案已进 bundle。(注:MCP 浏览器当前断开,视觉渲染待部署后线上看。)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

sundynix-admin/package-lock.json

@@ -8,9 +8,12 @@
       "name": "sundynix-admin",
       "version": "0.1.0",
       "dependencies": {
+        "clsx": "^2.1.1",
+        "lucide-react": "^1.25.0",
         "react": "^19.0.0",
         "react-dom": "^19.0.0",
-        "react-router-dom": "^7.1.0"
+        "react-router-dom": "^7.1.0",
+        "tailwind-merge": "^3.6.0"
       },
       "devDependencies": {
         "@testing-library/jest-dom": "^6.9.1",
@@ -2357,6 +2360,15 @@
         "node": ">= 6"
       }
     },
+    "node_modules/clsx": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/clsx/-/clsx-2.1.1.tgz",
+      "integrity": "sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/commander": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/commander/-/commander-4.1.1.tgz",
@@ -3220,6 +3232,15 @@
         "yallist": "^3.0.2"
       }
     },
+    "node_modules/lucide-react": {
+      "version": "1.25.0",
+      "resolved": "https://registry.npmjs.org/lucide-react/-/lucide-react-1.25.0.tgz",
+      "integrity": "sha512-/mdJTRbiwcLOQ1NZZK1amZF9rIZyvO18D6r9TngE6TG1NmqHgFuT4eE7Xrkm9UsXMbBJD1NlfwHVltCDWHrOTw==",
+      "license": "ISC",
+      "peerDependencies": {
+        "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/lz-string": {
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/lz-string/-/lz-string-1.5.0.tgz",
@@ -4040,6 +4061,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/tailwind-merge": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/tailwind-merge/-/tailwind-merge-3.6.0.tgz",
+      "integrity": "sha512-uxL7qAVQriqRQPAyK3pj66VqskWqoZ37PW94jwOTwNfq/z9oyu1V+eqrZqtR2+fCiXdYOZe/Modt8GtvqNzu+w==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/dcastil"
+      }
+    },
     "node_modules/tailwindcss": {
       "version": "3.4.19",
       "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-3.4.19.tgz",