feat: setup wizard + settings

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/settings/page.tsx

@@ -0,0 +1,19 @@
+import { requireUser } from "@/lib/auth";
+import { settingsView } from "@/lib/settings";
+import { listAnalyses } from "@/lib/db";
+import { saveSettingsAction, signOut } from "@/lib/actions";
+import { SettingsForm } from "@/components/settings-form";
+
+export default async function Settings() {
+  const u = await requireUser();
+  const rows = listAnalyses(u.id);
+  return <main className="main" style={{ maxWidth: 640, margin: "0 auto" }}>
+    <h1 style={{ fontFamily: "var(--qai-font-display)", fontSize: "var(--qai-text-2xl)" }}>Settings</h1>
+    <SettingsForm action={saveSettingsAction} view={settingsView(u.id)} account />
+    <section className="card">
+      <p className="label">History · {rows.length}</p>
+      <p style={{ fontSize: "var(--qai-text-sm)" }}>Rename or delete individual runs from the left rail. Nothing here deletes them in bulk — that is on purpose.</p>
+    </section>
+    <form action={signOut}><button className="btn">Sign out</button></form>
+  </main>;
+}