feat: refactor play area into sidebar layout with buttplug, recordings, and leaderboard sub-pages

- Add /play sidebar layout (mobile nav + desktop sidebar) with SexyBackground
- Move buttplug device control to /play/buttplug with Empty component and scan button
- Move recordings from /me/recordings to /play/recordings
- Move leaderboard to /play/leaderboard; redirect /leaderboard → /play/leaderboard
- Redirect /me/recordings → /play/recordings and /play → /play/buttplug
- Remove recordings entry from /me sidebar nav
- Rename "SexyPlay" → "Play", swap bluetooth icon for rocket, remove subtitle
- Add play.nav i18n keys (play, recordings, leaderboard, back_to_site, back_mobile)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/frontend/src/routes/play/buttplug/+page.server.ts

@@ -0,0 +1,19 @@
+import { getRecording } from "$lib/services";
+import type { Recording } from "$lib/types";
+
+export async function load({ url, fetch }) {
+  const recordingId = url.searchParams.get("recording");
+
+  let recording: Recording | null = null;
+  if (recordingId) {
+    try {
+      recording = await getRecording(recordingId, fetch);
+    } catch (error) {
+      console.error("Failed to load recording:", error);
+    }
+  }
+
+  return {
+    recording,
+  };
+}