feat: auth screen with auto-redirect, sync favorites/history with backend

.agents/skills/vercel-react-native-skills/rules/ui-safe-area-scroll.md

@@ -0,0 +1,65 @@
+---
+title: Use contentInsetAdjustmentBehavior for Safe Areas
+impact: MEDIUM
+impactDescription: native safe area handling, no layout shifts
+tags: safe-area, scrollview, layout
+---
+
+## Use contentInsetAdjustmentBehavior for Safe Areas
+
+Use `contentInsetAdjustmentBehavior="automatic"` on the root ScrollView instead of wrapping content in SafeAreaView or manual padding. This lets iOS handle safe area insets natively with proper scroll behavior.
+
+**Incorrect (SafeAreaView wrapper):**
+
+```tsx
+import { SafeAreaView, ScrollView, View, Text } from 'react-native'
+
+function MyScreen() {
+  return (
+    <SafeAreaView style={{ flex: 1 }}>
+      <ScrollView>
+        <View>
+          <Text>Content</Text>
+        </View>
+      </ScrollView>
+    </SafeAreaView>
+  )
+}
+```
+
+**Incorrect (manual safe area padding):**
+
+```tsx
+import { ScrollView, View, Text } from 'react-native'
+import { useSafeAreaInsets } from 'react-native-safe-area-context'
+
+function MyScreen() {
+  const insets = useSafeAreaInsets()
+
+  return (
+    <ScrollView contentContainerStyle={{ paddingTop: insets.top }}>
+      <View>
+        <Text>Content</Text>
+      </View>
+    </ScrollView>
+  )
+}
+```
+
+**Correct (native content inset adjustment):**
+
+```tsx
+import { ScrollView, View, Text } from 'react-native'
+
+function MyScreen() {
+  return (
+    <ScrollView contentInsetAdjustmentBehavior='automatic'>
+      <View>
+        <Text>Content</Text>
+      </View>
+    </ScrollView>
+  )
+}
+```
+
+The native approach handles dynamic safe areas (keyboard, toolbars) and allows content to scroll behind the status bar naturally.