アイヌ語追加 (#428) (#433)

Reviewed-on: #433
Co-authored-by: miteruzo <miteruzo@naver.com>

frontend/package.json

@@ -5,12 +5,15 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "tsc -b && vite build",
-    "postbuild": "node scripts/generate-sitemap.js",
+    "build": "tsc -b && npm run build:client && npm run build:server",
+    "build:client": "vite build --outDir dist/client",
+    "build:server": "vite build --ssr src/entry-server.tsx --outDir dist/server",
+    "start": "node server.mjs",
     "lint": "eslint .",
     "test": "vitest",
     "test:run": "vitest run",
-    "preview": "vite preview"
+    "test:ssr": "node --test server.ssr.test.mjs",
+    "preview": "vite preview --outDir dist/client"
   },
   "dependencies": {
     "@dnd-kit/core": "^6.3.1",
@@ -29,12 +32,14 @@
     "clsx": "^2.1.1",
     "framer-motion": "^12.23.26",
     "humps": "^2.0.1",
+    "i18next": "^26.4.7",
     "lucide-react": "^0.511.0",
     "markdown-it": "^14.1.0",
     "path-to-regexp": "^8.3.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
     "react-helmet-async": "^2.0.5",
+    "react-i18next": "^17.0.20",
     "react-markdown": "^10.1.0",
     "react-markdown-editor-lite": "^1.3.4",
     "react-router-dom": "^6.30.1",