refactor: 重构tabs栏

features/home/screens/home-screen.tsx

@@ -1,38 +0,0 @@
-import { Link } from "expo-router";
-import { StyleSheet, Text, View } from "react-native";
-
-export function HomeScreen() {
-  return (
-    <View style={styles.container}>
-      <Text style={styles.title}>lamp</Text>
-      <Text style={styles.subtitle}>OpenIM powered messaging workspace</Text>
-      <Link href="/modal" style={styles.link}>
-        Open modal preview
-      </Link>
-    </View>
-  );
-}
-
-const styles = StyleSheet.create({
-  container: {
-    flex: 1,
-    justifyContent: "center",
-    alignItems: "center",
-    gap: 10,
-    padding: 24,
-  },
-  title: {
-    fontSize: 32,
-    fontWeight: "700",
-    letterSpacing: 0.5,
-  },
-  subtitle: {
-    fontSize: 15,
-    color: "#5c6169",
-  },
-  link: {
-    marginTop: 8,
-    fontSize: 16,
-    fontWeight: "600",
-  },
-});

features/system/screens/modal-screen.tsx

@@ -1,38 +0,0 @@
-import { Link } from "expo-router";
-import { StyleSheet, Text, View } from "react-native";
-
-export function ModalScreen() {
-  return (
-    <View style={styles.container}>
-      <Text style={styles.title}>Modal Route</Text>
-      <Text style={styles.subtitle}>This screen is presented with modal behavior on native.</Text>
-      <Link href="/" dismissTo style={styles.link}>
-        Back to home
-      </Link>
-    </View>
-  );
-}
-
-const styles = StyleSheet.create({
-  container: {
-    flex: 1,
-    alignItems: "center",
-    justifyContent: "center",
-    padding: 20,
-    gap: 8,
-  },
-  title: {
-    fontSize: 24,
-    fontWeight: "700",
-  },
-  subtitle: {
-    fontSize: 14,
-    color: "#5c6169",
-    textAlign: "center",
-  },
-  link: {
-    marginTop: 8,
-    fontSize: 16,
-    fontWeight: "600",
-  },
-});