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

.agents/skills/vercel-react-native-skills/rules/fonts-config-plugin.md

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+---
+title: Load fonts natively at build time
+impact: LOW
+impactDescription: fonts available at launch, no async loading
+tags: fonts, expo, performance, config-plugin
+---
+
+## Use Expo Config Plugin for Font Loading
+
+Use the `expo-font` config plugin to embed fonts at build time instead of
+`useFonts` or `Font.loadAsync`. Embedded fonts are more efficient.
+
+**Incorrect (async font loading):**
+
+```tsx
+import { useFonts } from 'expo-font'
+import { Text, View } from 'react-native'
+
+function App() {
+  const [fontsLoaded] = useFonts({
+    'Geist-Bold': require('./assets/fonts/Geist-Bold.otf'),
+  })
+
+  if (!fontsLoaded) {
+    return null
+  }
+
+  return (
+    <View>
+      <Text style={{ fontFamily: 'Geist-Bold' }}>Hello</Text>
+    </View>
+  )
+}
+```
+
+**Correct (config plugin, fonts embedded at build):**
+
+```json
+// app.json
+{
+  "expo": {
+    "plugins": [
+      [
+        "expo-font",
+        {
+          "fonts": ["./assets/fonts/Geist-Bold.otf"]
+        }
+      ]
+    ]
+  }
+}
+```
+
+```tsx
+import { Text, View } from 'react-native'
+
+function App() {
+  // No loading state needed—font is already available
+  return (
+    <View>
+      <Text style={{ fontFamily: 'Geist-Bold' }}>Hello</Text>
+    </View>
+  )
+}
+```
+
+After adding fonts to the config plugin, run `npx expo prebuild` and rebuild the
+native app.
+
+Reference:
+[Expo Font Documentation](https://docs.expo.dev/versions/latest/sdk/font/)