Add streaks, scheduled releases, and notification settings

- Couple streaks with milestone notifications
- Scheduled pack releases with admin UI
- Notification preferences screen
- Refactored profile settings screens
- Partner activity notifications

apps/mobile/src/features/profile/screens/PreferencesScreen.tsx

@@ -0,0 +1,51 @@
+import React from 'react';
+import { ScrollView, StyleSheet, Platform } from 'react-native';
+
+import { GradientBackground } from '../../../components/ui';
+import { spacing } from '../../../theme';
+import { useProfileSettings } from '../hooks';
+import { ScreenHeader, PrivacySettings } from '../components';
+
+/**
+ * Preferences sub-screen for comfort zone and biometric settings.
+ */
+export function PreferencesScreen() {
+    const settings = useProfileSettings();
+
+    return (
+        <GradientBackground>
+            <ScreenHeader title="Preferences" />
+            <ScrollView
+                style={styles.container}
+                contentContainerStyle={styles.content}
+                showsVerticalScrollIndicator={false}
+            >
+                <PrivacySettings
+                    maxIntensity={settings.maxIntensity}
+                    isUpdatingIntensity={settings.isUpdatingIntensity}
+                    onIntensityChange={settings.handleIntensityChange}
+                    biometricAvailable={settings.biometricAvailable}
+                    biometricEnabled={settings.biometricEnabled}
+                    biometricType={settings.biometricType}
+                    isUpdatingBiometric={settings.isUpdatingBiometric}
+                    onBiometricToggle={settings.handleBiometricToggle}
+                    partnerIntensity={settings.partnerIntensity}
+                    partnerName={settings.partnerName}
+                    partnerAvatar={settings.partnerAvatar}
+                />
+            </ScrollView>
+        </GradientBackground>
+    );
+}
+
+const styles = StyleSheet.create({
+    container: {
+        flex: 1,
+    },
+    content: {
+        paddingTop: spacing.lg,
+        paddingBottom: Platform.OS === 'ios' ? 40 : 20,
+    },
+});
+
+export default PreferencesScreen;