首次提交：脑晴测 H5 项目

包含前端源码、预构建产物（dist/）、零依赖 Node.js 服务器（server.mjs）、
Cloudflare Worker 版本（worker/）、部署文档（DEPLOY.md）和交接文档。

技术总监可直接 clone 后运行 node server.mjs 启动，无需安装 React 或 build。
DEEPSEEK_API_KEY 通过环境变量注入，未纳入仓库。

brain-h5/scripts/update-mobile-runtime-lock.mjs

@@ -0,0 +1,48 @@
+#!/usr/bin/env node
+import { createHash } from "node:crypto";
+import { existsSync, readFileSync, writeFileSync } from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+const lockPath = path.join(root, "mobile-runtime.lock.json");
+const protectedFiles = [
+  "scripts/check-mobile-runtime.mjs",
+  "scripts/prepare-sites-build.mjs",
+  "scripts/update-mobile-runtime-lock.mjs",
+  "vite.config.ts",
+  "src/App.tsx",
+  "src/main.tsx",
+  "src/styles.css",
+  "src/mobile/BottomSheet.tsx",
+  "src/mobile/Carousel.tsx",
+  "src/mobile/Device.tsx",
+  "src/mobile/FlowStack.tsx",
+  "src/mobile/Keyboard.tsx",
+  "src/mobile/MobileCursor.tsx",
+  "src/mobile/MobileRuntime.tsx",
+  "src/mobile/MobileScroll.tsx",
+  "src/mobile/PhoneFrame.tsx",
+  "src/mobile/assets.ts",
+  "src/mobile/components.tsx",
+  "src/mobile/geometry.ts",
+  "src/mobile/index.ts",
+  "public/assets/iphone/Bezel.png",
+  "public/assets/iphone/Keyboard.png",
+  "public/assets/android/Pixel10.png",
+  "public/assets/android/Keyboard.png",
+  "public/assets/android/navigation-bar.svg",
+  "public/assets/status/status-icons.svg",
+  "public/assets/status/ios-status-icons.svg",
+  "worker/index.js",
+];
+
+const hashes = {};
+for (const relativePath of protectedFiles) {
+  const filePath = path.join(root, relativePath);
+  if (!existsSync(filePath)) throw new Error(`Protected runtime file is missing: ${relativePath}`);
+  hashes[relativePath] = createHash("sha256").update(readFileSync(filePath)).digest("hex");
+}
+
+writeFileSync(lockPath, `${JSON.stringify(hashes, null, 2)}\n`);
+console.log(`Updated mobile-runtime.lock.json (${protectedFiles.length} protected files).`);