Streamline the Replay view with the Control view

Page title is now "{session name} - Replay" (matching generateMetadata)
instead of a bare "Replay" heading with the name duplicated inside a
Card title. Dropped that redundant outer Card - the pre-connection
scan/match buttons now sit in a flat row below the header, same as
Control's scan/record row, with the same "no devices connected" hint
card shown underneath when nothing's connected yet. Playback controls
once a replay starts still live in a card, matching DeviceCard's style.
Also gave "Match & replay" a Play icon.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WzyfRyA7h5rs5SCAahLAWd

app/(app)/sessions/[id]/replay/page.tsx

@@ -5,14 +5,21 @@ import { getSessionName } from "@/lib/db/queries/sessions";
 export async function generateMetadata({ params }: { params: Promise<{ id: string }> }): Promise<Metadata> {
   const { id } = await params;
   const name = await getSessionName(Number(id));
-  return { title: name ? `Replay ${name}` : "Replay" };
+  return { title: name ? `${name} - Replay` : "Replay" };
 }
 
 export default async function ReplayPage({ params }: { params: Promise<{ id: string }> }) {
   const { id } = await params;
+  const name = await getSessionName(Number(id));
   return (
     <div className="flex flex-col gap-6">
-      <h1 className="font-heading text-2xl font-semibold">Replay</h1>
+      <div>
+        <h1 className="font-heading text-2xl font-semibold">{name ?? `Session #${id}`} - Replay</h1>
+        <p className="text-sm text-muted-foreground">
+          Connect the devices you want to replay onto, then match them to this session&apos;s original device
+          slots and play its recorded intensity back live over Web Bluetooth.
+        </p>
+      </div>
       <ReplayPlayerLoader sessionId={Number(id)} />
     </div>
   );