Implement RFID tag dump PWA with REST API, auth, and CI (#1)

Add Next.js app with SQLite/Drizzle storage for sites and LF/HF tag
dumps, multi-user Auth.js (credentials + optional OIDC), personal API
tokens in Settings, versioned /api/v1 for UI and future CLI use,
MCT/Proxmark/JSON import-export, PWA offline shell, Vitest tests, and
GitHub Actions CI.

Co-authored-by: Cursor Agent <[email protected]>

src/components/AppHeader.tsx

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+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { signOut, useSession } from "next-auth/react";
+
+export function AppHeader() {
+  const { data: session } = useSession();
+  const pathname = usePathname();
+  if (pathname === "/login") return null;
+
+  return (
+    <header
+      style={{
+        borderBottom: "1px solid var(--border)",
+        background: "rgba(15, 20, 25, 0.85)",
+        backdropFilter: "blur(8px)",
+        position: "sticky",
+        top: 0,
+        zIndex: 20,
+      }}
+    >
+      <div
+        className="container"
+        style={{
+          display: "flex",
+          alignItems: "center",
+          justifyContent: "space-between",
+          padding: "0.75rem 0",
+          gap: "1rem",
+        }}
+      >
+        <Link href="/" style={{ display: "flex", alignItems: "baseline", gap: "0.5rem" }}>
+          <span style={{ fontWeight: 800, letterSpacing: "-0.03em", fontSize: "1.1rem" }}>
+            RFID DB
+          </span>
+          <span className="muted" style={{ fontSize: "0.75rem" }}>
+            tag dumps
+          </span>
+        </Link>
+        <nav className="row" style={{ gap: "0.25rem" }}>
+          <Link className="btn btn-ghost" href="/">
+            Sites
+          </Link>
+          <Link className="btn btn-ghost" href="/tags/new">
+            New tag
+          </Link>
+          <Link className="btn btn-ghost" href="/settings">
+            Settings
+          </Link>
+          {session?.user && (
+            <button
+              type="button"
+              className="btn btn-ghost"
+              onClick={() => signOut({ callbackUrl: "/login" })}
+            >
+              Sign out
+            </button>
+          )}
+        </nav>
+      </div>
+    </header>
+  );
+}

src/components/CopyButton.tsx

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+"use client";
+
+import { useState } from "react";
+
+export function CopyButton({ value, label = "Copy" }: { value: string; label?: string }) {
+  const [copied, setCopied] = useState(false);
+
+  async function onCopy() {
+    await navigator.clipboard.writeText(value);
+    setCopied(true);
+    setTimeout(() => setCopied(false), 1500);
+  }
+
+  return (
+    <button type="button" className="btn btn-secondary" onClick={onCopy} style={{ padding: "0.3rem 0.6rem", fontSize: "0.8rem" }}>
+      {copied ? "Copied" : label}
+    </button>
+  );
+}

src/components/Providers.tsx

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+"use client";
+
+import { SessionProvider } from "next-auth/react";
+
+export function Providers({ children }: { children: React.ReactNode }) {
+  return <SessionProvider>{children}</SessionProvider>;
+}

src/components/ServiceWorkerRegister.tsx

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+"use client";
+
+import { useEffect } from "react";
+
+export function ServiceWorkerRegister() {
+  useEffect(() => {
+    if (typeof window === "undefined" || !("serviceWorker" in navigator)) return;
+    navigator.serviceWorker.register("/sw.js").catch(() => {
+      // ignore registration failures in dev
+    });
+  }, []);
+  return null;
+}