Mobile: redesign, onboarding, QR codes, logo, Spotify setup

- Redesign matching the web: album-art backdrops, Reanimated equalizer,
  spinning live ring, drifting ambient background, gradient buttons with
  spring press feedback and haptics, Space Grotesk headings, animated feed
  (enter + layout transitions); fix invisible tab labels
- Four-step onboarding for new accounts: which app you listen with (sets
  where songs open), the matching share setup, find friends (search,
  scan, invite), and a featured song. Skippable; stored server-side
- QR codes: My code (share link) and an in-app scanner (camera only, no
  microphone permission)
- Spotify setup via Last.fm or ListenBrainz with guided linking; Android
  shares Spotify automatically through the phone reader
- New logo as app icon, adaptive/monochrome icon and splash
- app.config.ts allows cleartext only for local http:// test builds

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MzFywujuH9TiuXbr9vjoX8

apps/mobile/package.json

@@ -3,14 +3,19 @@
   "main": "expo-router/entry",
   "version": "1.0.0",
   "dependencies": {
+    "@expo-google-fonts/space-grotesk": "^0.4.1",
     "@expo/ui": "~57.0.21",
     "@musicshare/shared": "*",
     "expo": "~57.0.26",
+    "expo-build-properties": "~57.0.22",
+    "expo-camera": "~57.0.6",
     "expo-constants": "~57.0.20",
     "expo-device": "~57.0.2",
     "expo-font": "~57.0.4",
     "expo-glass-effect": "~57.0.4",
+    "expo-haptics": "~57.0.3",
     "expo-image": "~57.0.5",
+    "expo-linear-gradient": "~57.0.2",
     "expo-linking": "~57.0.11",
     "expo-router": "~57.0.24",
     "expo-secure-store": "~57.0.4",
@@ -26,6 +31,7 @@
     "react-native-reanimated": "4.5.1",
     "react-native-safe-area-context": "~5.7.0",
     "react-native-screens": "~4.26.0",
+    "react-native-svg": "15.15.4",
     "react-native-web": "~0.21.0",
     "react-native-worklets": "0.10.1",
     "swr": "^2.5.1"