New look: slate-indigo panels, pink accent, Poppins, and a gradient card for your song

Inspired by a dashboard design the user shared.
- App: new palette and fonts, borderless rounded panels with soft shadows, a pink-to-blue
  gradient card for your own song (text and controls switch to white on it), flat cards for
  friends, a 'Hi Chris, welcome back' header, an outline bell, and a pink pill on the active tab.
- Website: the same look, plus a wide-screen layout with a sidebar, the page in a rounded panel,
  and a right column with your profile, recent activity and recent plays. Phones keep the top
  bar and bottom tabs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011Y2iUsKEWDuRGjK5FPmcUP

apps/mobile/package.json

@@ -4,7 +4,7 @@
   "version": "1.3.0",
   "license": "AGPL-3.0-or-later",
   "dependencies": {
-    "@expo-google-fonts/space-grotesk": "^0.4.1",
+    "@expo-google-fonts/poppins": "^0.4.1",
     "@expo/ui": "~57.0.21",
     "@musicshare/shared": "*",
     "expo": "~57.0.26",