fix: render dashboard greeting and date client-side to respect local timezone

src/components/dashboard-greeting.tsx

@@ -0,0 +1,24 @@
+"use client";
+
+const greetingForHour = (h: number) =>
+  h < 5 ? "Up early" : h < 12 ? "Good morning" : h < 18 ? "Good afternoon" : "Good evening";
+
+export function DashboardGreeting({ firstName }: { firstName: string }) {
+  const now = new Date();
+  const greeting = greetingForHour(now.getHours());
+  const today = now.toLocaleDateString(undefined, {
+    weekday: "long",
+    month: "long",
+    day: "numeric",
+  });
+
+  return (
+    <div>
+      <h1 className="serif text-[26px] sm:text-[30px] leading-tight tracking-tight">
+        {greeting}
+        {firstName && `, ${firstName}`}.
+      </h1>
+      <p className="muted mt-1 text-[13px]">{today}</p>
+    </div>
+  );
+}