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/src/app/(tabs)/settings.tsx

@@ -1,9 +1,6 @@
-import * as Linking from 'expo-linking';
-import * as WebBrowser from 'expo-web-browser';
-import { Image } from 'expo-image';
 import { router } from 'expo-router';
 import { useState } from 'react';
-import { Alert, Pressable, StyleSheet, Text, View } from 'react-native';
+import { Alert, Platform, StyleSheet, Text, View } from 'react-native';
 import useSWR from 'swr';
 import {
   SERVICE_LABELS,
@@ -11,17 +8,17 @@ import {
   timeAgo,
   type ConnectionDTO,
   type NowPlayingProvider,
-  type TrackSearchResultDTO,
 } from '@musicshare/shared';
 import { RelinkReminder } from '@/components/RelinkReminder';
+import { FeaturedPicker } from '@/components/FeaturedPicker';
 import { Screen } from '@/components/Screen';
 import { SharingControls } from '@/components/SharingControls';
 import { Body, Button, Card, Chip, Field, Heading, Row, Title } from '@/components/ui';
 import { api } from '@/lib/api';
 import { showError } from '@/lib/errors';
 import { AppleMusicPermissionError, appleMusicAvailable, connectAppleMusic } from '@/lib/appleMusic';
+import { SignInError, openSpotifyLinkPage, signInWithService } from '@/lib/connect';
 import { openReaderSettings, useReader } from '@/lib/nowPlayingReader';
-import { useDebounced } from '@/lib/useDebounced';
 import { useSession } from '@/lib/session';
 import { colors, radius, space } from '@/lib/theme';
 
@@ -130,53 +127,19 @@ function Connections() {
     await mutate();
   };
 
-  /** Sign in on the service's site and come back via deep link. Returns true when connected. */
-  const signIn = async (provider: 'spotify' | 'plex' | 'lastfm'): Promise<boolean> => {
-    // Deep link back into the app; in Expo Go this is an exp:// URL, in builds musicshare://
-    const returnTo = Linking.createURL('settings');
-    const { url } = await api.authorizeUrl(provider, { client: 'mobile', returnTo });
-    const result = await WebBrowser.openAuthSessionAsync(url, returnTo);
-    if (result.type !== 'success') return false;
-    const error = Linking.parse(result.url).queryParams?.error;
-    if (error === 'spotify_limited') {
-      offerSpotifyViaLastfm();
-      return false;
-    }
-    if (typeof error === 'string') {
-      Alert.alert(`Couldn't connect ${SERVICE_LABELS[provider]}`, error);
-      return false;
-    }
-    return true;
-  };
-
-  const connectOAuth = (provider: 'spotify' | 'plex' | 'lastfm') => run(() => signIn(provider));
-
-  /**
-   * Spotify only lets small apps sign in a handful of accounts. Spotify's own
-   * Last.fm link works for everyone: sign in to Last.fm here, then approve
-   * "Spotify Scrobbling" on Last.fm.
-   */
-  const linkSpotifyOnLastfm = () =>
-    WebBrowser.openBrowserAsync('https://www.last.fm/settings/applications').catch((e) => showError(e));
-
-  const setUpSpotifyViaLastfm = () =>
+  /** Sign in on the service's site (Plex, Last.fm) and come back to the app. */
+  const connectOAuth = (provider: 'plex' | 'lastfm') =>
     run(async () => {
-      if (!byProvider.has('lastfm') && !(await signIn('lastfm'))) return;
-      Alert.alert('Last step: link Spotify', 'On the next page, tap Connect next to "Spotify Scrobbling" and approve.', [
-        { text: 'Open Last.fm', onPress: linkSpotifyOnLastfm },
-      ]);
+      try {
+        await signInWithService(provider);
+      } catch (err) {
+        if (err instanceof SignInError) Alert.alert(`Couldn't connect ${SERVICE_LABELS[provider]}`, err.message);
+        else throw err;
+      }
     });
 
-  function offerSpotifyViaLastfm() {
-    Alert.alert(
-      'Spotify sign-in is limited during beta',
-      "Spotify only allows a few accounts to sign in to new apps directly. You can still share Spotify through Last.fm: two quick approvals, and it works for everyone.",
-      [
-        { text: 'Not now', style: 'cancel' },
-        { text: 'Set up', onPress: setUpSpotifyViaLastfm },
-      ],
-    );
-  }
+  const linkSpotifyOnLastfm = () => openSpotifyLinkPage('lastfm').catch((e) => showError(e));
+  const spotifyLinked = byProvider.has('lastfm') || byProvider.has('listenbrainz');
 
   const disconnect = (provider: NowPlayingProvider) =>
     Alert.alert(`Disconnect ${SERVICE_LABELS[provider]}?`, 'Friends will stop seeing what you play there.', [
@@ -229,25 +192,39 @@ function Connections() {
         </View>
       )}
 
-      {(['spotify', 'plex'] as const).map((p) => (
-        <View key={p} style={[styles.connectionColumn, styles.connection]}>
-          <View style={{ flex: 1 }}>
-            <Text style={styles.provider}>{SERVICE_LABELS[p]}</Text>
-            {status(p, p === 'plex' ? 'Music you play from your Plex servers' : 'Live from your Spotify account')}
-          </View>
-          {isActive(p) ? (
-            <Button small title="Disconnect" onPress={() => disconnect(p)} />
-          ) : (
-            <Button small variant="primary" title={byProvider.has(p) ? 'Reconnect' : 'Connect'} onPress={() => connectOAuth(p)} />
-          )}
+      {/* Spotify caps new apps at a handful of accounts, so Spotify comes in through
+          its own Last.fm / ListenBrainz link (or the Android toggle). */}
+      <View style={[styles.connectionColumn, styles.connection]}>
+        <View style={{ flex: 1 }}>
+          <Text style={styles.provider}>Spotify</Text>
+          <Body muted style={styles.small}>
+            {Platform.OS === 'android'
+              ? 'Shared automatically by “This phone” above. On other devices, connect it through Last.fm or ListenBrainz.'
+              : spotifyLinked
+                ? 'Through Spotify’s link to Last.fm or ListenBrainz. Make sure it’s linked there.'
+                : 'Connect it through Last.fm or ListenBrainz: Spotify sends your plays there, and we share them.'}
+          </Body>
         </View>
-      ))}
+        <Button small variant={spotifyLinked ? 'secondary' : 'primary'} title={spotifyLinked ? 'Check link' : 'Set up'} onPress={() => router.push('/spotify-setup')} />
+      </View>
+
+      <View style={[styles.connectionColumn, styles.connection]}>
+        <View style={{ flex: 1 }}>
+          <Text style={styles.provider}>Plex</Text>
+          {status('plex', 'Music you play from your Plex servers')}
+        </View>
+        {isActive('plex') ? (
+          <Button small title="Disconnect" onPress={() => disconnect('plex')} />
+        ) : (
+          <Button small variant="primary" title={byProvider.has('plex') ? 'Reconnect' : 'Connect'} onPress={() => connectOAuth('plex')} />
+        )}
+      </View>
 
       <View style={styles.connectionColumn}>
         <View style={styles.connection}>
           <View style={{ flex: 1 }}>
             <Text style={styles.provider}>Last.fm</Text>
-            {status('lastfm', 'Also the way to share Spotify for everyone (via Spotify’s Last.fm link).')}
+            {status('lastfm', 'Scrobbles from Spotify, TIDAL, YouTube Music and more.')}
           </View>
           {byProvider.has('lastfm') ? (
             <Button small title="Disconnect" onPress={() => disconnect('lastfm')} />
@@ -387,82 +364,6 @@ function JellyfinConnection({
   );
 }
 
-function FeaturedPicker() {
-  const [q, setQ] = useState('');
-  const [selected, setSelected] = useState<TrackSearchResultDTO | null>(null);
-  const [comment, setComment] = useState('');
-  const [saved, setSaved] = useState(false);
-  const [busy, setBusy] = useState(false);
-  const query = useDebounced(q.trim(), 300);
-  const { data: results } = useSWR<TrackSearchResultDTO[]>(
-    query.length >= 2 && !selected ? `/tracks/search?q=${encodeURIComponent(query)}` : null,
-  );
-
-  const save = async () => {
-    if (!selected) return;
-    setBusy(true);
-    try {
-      await api.setFeatured({ deezerId: selected.deezerId, comment: comment.trim() || null });
-      setSaved(true);
-    } catch (err) {
-      showError(err);
-    }
-    setBusy(false);
-  };
-
-  return (
-    <Card>
-      <Heading>Featured song</Heading>
-      <Body muted style={styles.small}>
-        Pin a song to your profile, with an optional note about why.
-      </Body>
-      {selected ? (
-        <>
-          <View style={styles.result}>
-            {selected.artworkUrl && <Image source={selected.artworkUrl} style={styles.thumb} />}
-            <View style={{ flex: 1 }}>
-              <Text style={styles.provider} numberOfLines={1}>
-                {selected.title}
-              </Text>
-              <Body muted style={styles.small}>
-                {selected.artist}
-              </Body>
-            </View>
-            <Button small title="Change" onPress={() => (setSelected(null), setSaved(false))} />
-          </View>
-          <Field
-            placeholder="Say something about it (optional)"
-            value={comment}
-            onChangeText={setComment}
-            maxLength={280}
-            multiline
-            style={{ minHeight: 64 }}
-          />
-          <Button
-            variant="primary"
-            title={saved ? 'Featured ✓' : 'Feature this song'}
-            loading={busy}
-            onPress={save}
-            style={{ alignSelf: 'flex-start' }}
-          />
-        </>
-      ) : (
-        <>
-          <Field placeholder="Search for a song" value={q} onChangeText={setQ} autoCorrect={false} returnKeyType="search" />
-          {results?.map((r) => (
-            <Pressable key={r.deezerId} style={styles.result} onPress={() => setSelected(r)} accessibilityRole="button">
-              {r.artworkUrl && <Image source={r.artworkUrl} style={styles.thumb} />}
-              <Text style={styles.resultText} numberOfLines={1}>
-                {r.title} <Text style={{ color: colors.muted }}>· {r.artist}</Text>
-              </Text>
-            </Pressable>
-          ))}
-        </>
-      )}
-    </Card>
-  );
-}
-
 function Account() {
   const { me, signOut } = useSession();
   const confirmDelete = () =>