Task 0df715b5: React scaffold, build and serve (#187)

admin/src/App.css

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+/* Shell layout — mobile-first (390x844 reference), plain CubeCraft styling. */
+
+.admin-shell {
+  display: flex;
+  flex-direction: column;
+  min-height: 100%;
+}
+
+.admin-header {
+  background: var(--nq-a-surface);
+  border-bottom: 1px solid var(--nq-a-border);
+  padding: 14px 16px;
+}
+
+.admin-title {
+  margin: 0;
+  font-size: 24px;
+  font-weight: 800;
+  letter-spacing: -0.02em;
+}
+
+.admin-subline {
+  margin: 2px 0 0;
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--nq-a-ink-secondary);
+}
+
+.admin-panel {
+  flex: 1;
+  padding: 14px 16px 92px; /* bottom padding clears the 70px tab bar */
+}
+
+.admin-placeholder {
+  margin: 0;
+  padding: 13px;
+  background: var(--nq-a-surface);
+  border: 1px solid var(--nq-a-border);
+  border-radius: 8px;
+  font-size: 13.5px;
+  font-weight: 600;
+  color: var(--nq-a-ink-secondary);
+}
+
+.admin-tabbar {
+  position: fixed;
+  inset: auto 0 0;
+  display: flex;
+  min-height: calc(var(--nq-a-tabbar-height) + 12px);
+  padding: 8px 4px calc(12px + env(safe-area-inset-bottom));
+  background: var(--nq-a-surface);
+  border-top: 1px solid var(--nq-a-border);
+}
+
+.admin-tab {
+  flex: 1;
+  border: 0;
+  background: none;
+  font-family: inherit;
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--nq-a-ink-secondary);
+  cursor: pointer;
+  padding: 6px 4px;
+}
+
+.admin-tab.active {
+  font-weight: 700;
+  color: var(--nq-brand-blue);
+}

admin/src/App.test.tsx

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+import { afterEach, describe, expect, it } from "vitest";
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import App from "./App";
+
+describe("NestQuest Admin shell", () => {
+  afterEach(cleanup);
+
+  it("renders the title and all four tab labels", () => {
+    render(<App />);
+
+    expect(screen.getByRole("heading", { name: "NestQuest Admin" })).toBeTruthy();
+    for (const label of ["Today", "Tasks", "Schedule", "History"]) {
+      expect(screen.getByRole("tab", { name: label })).toBeTruthy();
+    }
+  });
+
+  it("starts on the Today placeholder and switches on tab click", () => {
+    render(<App />);
+
+    expect(screen.getByRole("tabpanel").textContent).toContain(
+      "Today placeholder",
+    );
+
+    fireEvent.click(screen.getByRole("tab", { name: "History" }));
+
+    expect(screen.getByRole("tabpanel").textContent).toContain(
+      "History placeholder",
+    );
+    expect(screen.getByRole("tab", { name: "History" }).getAttribute("aria-selected")).toBe(
+      "true",
+    );
+  });
+});

admin/src/App.tsx

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+import { useState } from "react";
+import "./App.css";
+
+const TABS = [
+  { id: "today", label: "Today" },
+  { id: "tasks", label: "Tasks" },
+  { id: "schedule", label: "Schedule" },
+  { id: "history", label: "History" },
+] as const;
+
+type TabId = (typeof TABS)[number]["id"];
+
+export default function App() {
+  const [active, setActive] = useState<TabId>("today");
+
+  return (
+    <div className="admin-shell">
+      <header className="admin-header">
+        <h1 className="admin-title">NestQuest Admin</h1>
+        <p className="admin-subline">Admin console</p>
+      </header>
+      <main
+        className="admin-panel"
+        role="tabpanel"
+        aria-labelledby={`tab-${active}`}
+      >
+        <p className="admin-placeholder">
+          {TABS.find((tab) => tab.id === active)?.label} placeholder — screens
+          arrive in later tasks.
+        </p>
+      </main>
+      <nav className="admin-tabbar" aria-label="Admin sections">
+        {TABS.map((tab) => (
+          <button
+            key={tab.id}
+            id={`tab-${tab.id}`}
+            type="button"
+            role="tab"
+            aria-selected={tab.id === active}
+            className={tab.id === active ? "admin-tab active" : "admin-tab"}
+            onClick={() => setActive(tab.id)}
+          >
+            {tab.label}
+          </button>
+        ))}
+      </nav>
+    </div>
+  );
+}

admin/src/index.css

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+/* NestQuest Admin — global tokens + base.
+   Plain CubeCraft styling, mobile-first, 390x844 reference
+   (design/ADMIN-SPEC.md). Values mirror design/tokens/nestquest-admin-tokens.css,
+   re-scoped to :root for the standalone PWA. */
+
+:root {
+  --nq-brand-blue: #3b3ab8;
+  --nq-brand-purple: #a035cc;
+
+  --nq-a-page: #f4f4f6;
+  --nq-a-surface: #ffffff;
+  --nq-a-border: #e4e4ea;
+  --nq-a-divider: #ededf1;
+
+  --nq-a-ink: #18181d;
+  --nq-a-ink-secondary: #52525e;
+  --nq-a-ink-tertiary: #70707e;
+
+  --nq-a-font: Nunito, system-ui, sans-serif;
+  --nq-a-tabbar-height: 70px;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+html,
+body,
+#root {
+  margin: 0;
+  height: 100%;
+}
+
+body {
+  font-family: var(--nq-a-font);
+  background: var(--nq-a-page);
+  color: var(--nq-a-ink);
+  -webkit-font-smoothing: antialiased;
+}

admin/src/main.tsx

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+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import App from "./App";
+import "./index.css";
+
+createRoot(document.getElementById("root")!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);