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/tests/runtime-fixture.tsx

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+import { StrictMode, useState } from "react";
+import { createRoot } from "react-dom/client";
+import {
+  BottomSheet,
+  Carousel,
+  FlowStack,
+  KeyboardInput,
+  MobileRuntime,
+  MobileScroll,
+  type FlowScreen,
+} from "../src/mobile";
+import "../src/styles.css";
+import "./runtime-fixture.css";
+
+function CarouselFixture() {
+  const [tapCount, setTapCount] = useState(0);
+  const [sheetOpen, setSheetOpen] = useState(false);
+
+  return (
+    <MobileRuntime>
+      <MobileScroll className="fixture-screen">
+        <main className="fixture-content">
+          <h1>Runtime fixture</h1>
+          <button className="sheet-trigger" type="button" onClick={() => setSheetOpen(true)}>
+            Open sheet
+          </button>
+          <Carousel
+            ariaLabel="Featured cards"
+            className="fixture-carousel"
+            contentClassName="fixture-carousel-track"
+          >
+            {Array.from({ length: 7 }, (_, index) => (
+              <button
+                className="carousel-card"
+                type="button"
+                onClick={() => setTapCount((count) => count + 1)}
+                key={index}
+              >
+                Card {index + 1}
+              </button>
+            ))}
+          </Carousel>
+          <output data-testid="tap-count">{tapCount}</output>
+          <div className="fixture-tall-content">Scrollable parent content</div>
+        </main>
+      </MobileScroll>
+      <BottomSheet
+        open={sheetOpen}
+        onOpenChange={setSheetOpen}
+        title="Animated sheet"
+        description="Exit motion regression fixture."
+      >
+        <p>Sheet content</p>
+      </BottomSheet>
+    </MobileRuntime>
+  );
+}
+
+function KeyboardFixture() {
+  const screen: FlowScreen = {
+    id: "keyboard",
+    footerHeight: 84,
+    footer: () => (
+      <div className="keyboard-footer">
+        <KeyboardInput aria-label="Message" placeholder="Message" />
+      </div>
+    ),
+    render: () => (
+      <MobileScroll className="fixture-screen">
+        <main className="fixture-content fixture-tall-content">Keyboard fixture</main>
+      </MobileScroll>
+    ),
+  };
+
+  return (
+    <MobileRuntime>
+      <FlowStack initial={screen} />
+    </MobileRuntime>
+  );
+}
+
+function stackedScreen(level: number): FlowScreen {
+  return {
+    id: `flow-level-${level}`,
+    headerHeight: 56,
+    header: (flow) => (
+      <div className="flow-fixture-header">
+        <button type="button" onClick={flow.pop}>‹ Back</button>
+        <strong>Level {level}</strong>
+        <span />
+      </div>
+    ),
+    footerHeight: 64,
+    footer: (flow) => (
+      <div className="flow-fixture-footer">
+        <button type="button" onClick={flow.pop}>Done</button>
+      </div>
+    ),
+    render: (flow) => (
+      <MobileScroll className="fixture-screen">
+        <main className="fixture-content">
+          <h1>{level === 2 ? "Screen stacking works" : `Nested view level ${level}`}</h1>
+          {level < 4 ? (
+            <button type="button" onClick={() => flow.push(stackedScreen(level + 1))}>
+              Push level {level + 1}
+            </button>
+          ) : null}
+        </main>
+      </MobileScroll>
+    ),
+  };
+}
+
+function FlowFixture() {
+  const screen: FlowScreen = {
+    id: "flow-root",
+    footerHeight: 84,
+    footer: () => (
+      <div className="keyboard-footer">
+        <KeyboardInput aria-label="Flow message" placeholder="Message" />
+      </div>
+    ),
+    render: (flow) => (
+      <MobileScroll className="fixture-screen">
+        <main className="fixture-content">
+          <h1>Flow root</h1>
+          <button type="button" onClick={() => flow.push(stackedScreen(2))}>
+            Push level 2
+          </button>
+        </main>
+      </MobileScroll>
+    ),
+  };
+
+  return (
+    <MobileRuntime>
+      <FlowStack initial={screen} />
+    </MobileRuntime>
+  );
+}
+
+const fixture = new URLSearchParams(window.location.search).get("fixture");
+const fixtureElement =
+  fixture === "keyboard"
+    ? <KeyboardFixture />
+    : fixture === "flow"
+      ? <FlowFixture />
+      : <CarouselFixture />;
+
+createRoot(document.getElementById("root")!).render(
+  <StrictMode>{fixtureElement}</StrictMode>,
+);