POWR/app/(tabs)/_layout.tsx

// app/(tabs)/_layout.tsx
import React from 'react';
import { Platform } from 'react-native';
import { Tabs } from 'expo-router';
import { useTheme } from '@react-navigation/native';
import { Dumbbell, Library, Users, History, User } from 'lucide-react-native';
import { convertHSLValues } from '@/lib/theme';

export default function TabLayout() {
  const { colors, dark } = useTheme();
  const { purple, mutedForeground } = convertHSLValues(dark ? 'dark' : 'light');
  
  return (
    <Tabs
      screenOptions={{
        headerShown: false,
        tabBarStyle: {
          backgroundColor: colors.background,
          borderTopColor: colors.border,
          borderTopWidth: Platform.OS === 'ios' ? 0.5 : 1,
          elevation: 0,
          shadowOpacity: 0,
        },
        tabBarActiveTintColor: purple,
        tabBarInactiveTintColor: mutedForeground,
        tabBarShowLabel: true,
        tabBarLabelStyle: {
          fontSize: 12,
          marginBottom: Platform.OS === 'ios' ? 0 : 4,
        },
      }}>
      <Tabs.Screen
        name="profile"
        options={{
          title: 'Profile',
          tabBarIcon: ({ color, size }) => (
            <User size={size} color={color} />
          ),
        }}
      />
      <Tabs.Screen
        name="library"
        options={{
          title: 'Library',
          tabBarIcon: ({ color, size }) => (
            <Library size={size} color={color} />
          ),
        }}
      />
      <Tabs.Screen
        name="index"
        options={{
          title: 'Workout',
          tabBarIcon: ({ color, size }) => (
            <Dumbbell size={size} color={color} />
          ),
        }}
      />
      <Tabs.Screen
        name="social"
        options={{
          title: 'Social',
          tabBarIcon: ({ color, size }) => (
            <Users size={size} color={color} />
          ),
        }}
      />
      <Tabs.Screen
        name="history"
        options={{
          title: 'History',
          tabBarIcon: ({ color, size }) => (
            <History size={size} color={color} />
          ),
        }}
      />
    </Tabs>
  );
}