M0：照壁 BFF 骨架（Fastify 透明代理：鉴权/幂等/续传头透传、SSE 直通、HJ-3001 映射）及测试与镜像

bff/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "hunjing-bff",
+  "version": "0.1.0",
+  "private": true,
+  "description": "照壁 · 魂镜 BFF（鉴权透传 / SSE 代理 / 响应透传）",
+  "type": "module",
+  "engines": {
+    "node": ">=22"
+  },
+  "scripts": {
+    "dev": "tsx watch src/server.ts",
+    "build": "tsc -p tsconfig.json",
+    "start": "node dist/server.js",
+    "test": "vitest run",
+    "type-check": "tsc --noEmit"
+  },
+  "dependencies": {
+    "fastify": "^5.2.0"
+  },
+  "devDependencies": {
+    "@types/node": "^22.10.0",
+    "tsx": "^4.19.0",
+    "typescript": "^5.7.0",
+    "vitest": "^3.0.0"
+  }
+}