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/lib/i18n/locales/en.ts

@@ -822,11 +822,19 @@ export default {
     questions_email: "support@pivoine.art",
   },
   play: {
-    title: "SexyPlay",
+    title: "Play",
     description: "Bring your toys.",
     scan: "Start Scan",
     scanning: "Scanning...",
-    no_results: "No Devices founds",
+    no_results: "No devices found",
+    no_results_description: "Start a scan to discover nearby Bluetooth devices",
+    nav: {
+      play: "Play",
+      recordings: "Recordings",
+      leaderboard: "Leaderboard",
+      back_to_site: "Back to site",
+      back_mobile: "Site",
+    },
   },
   error: {
     not_found: "Oops! Page Not Found",