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

.agents/skills/vercel-react-native-skills/rules/ui-expo-image.md

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+---
+title: Use expo-image for Optimized Images
+impact: HIGH
+impactDescription: memory efficiency, caching, blurhash placeholders, progressive loading
+tags: images, performance, expo-image, ui
+---
+
+## Use expo-image for Optimized Images
+
+Use `expo-image` instead of React Native's `Image`. It provides memory-efficient caching, blurhash placeholders, progressive loading, and better performance for lists.
+
+**Incorrect (React Native Image):**
+
+```tsx
+import { Image } from 'react-native'
+
+function Avatar({ url }: { url: string }) {
+  return <Image source={{ uri: url }} style={styles.avatar} />
+}
+```
+
+**Correct (expo-image):**
+
+```tsx
+import { Image } from 'expo-image'
+
+function Avatar({ url }: { url: string }) {
+  return <Image source={{ uri: url }} style={styles.avatar} />
+}
+```
+
+**With blurhash placeholder:**
+
+```tsx
+<Image
+  source={{ uri: url }}
+  placeholder={{ blurhash: 'LGF5]+Yk^6#M@-5c,1J5@[or[Q6.' }}
+  contentFit="cover"
+  transition={200}
+  style={styles.image}
+/>
+```
+
+**With priority and caching:**
+
+```tsx
+<Image
+  source={{ uri: url }}
+  priority="high"
+  cachePolicy="memory-disk"
+  style={styles.hero}
+/>
+```
+
+**Key props:**
+
+- `placeholder` — Blurhash or thumbnail while loading
+- `contentFit` — `cover`, `contain`, `fill`, `scale-down`
+- `transition` — Fade-in duration (ms)
+- `priority` — `low`, `normal`, `high`
+- `cachePolicy` — `memory`, `disk`, `memory-disk`, `none`
+- `recyclingKey` — Unique key for list recycling
+
+For cross-platform (web + native), use `SolitoImage` from `solito/image` which uses `expo-image` under the hood.
+
+Reference: [expo-image](https://docs.expo.dev/versions/latest/sdk/image/)