Add initial JSON data files and implement core page components for game functionality

app/Screens/LoginPage.jsx

@@ -0,0 +1,114 @@
+import React, { useState } from 'react';
+import { View, Text, TextInput, Pressable, StyleSheet } from 'react-native';
+import { useNavigation } from '@react-navigation/native';
+import useAuthViewModel from '../ViewModel/useAuthViewModel';
+
+const LoginPage = () => {
+  const navigation = useNavigation();
+  const {
+    email,
+    password,
+    error,
+    setEmail,
+    setPassword,
+    login,
+  } = useAuthViewModel();
+  const [submitting, setSubmitting] = useState(false);
+
+  const handleLogin = async () => {
+    setSubmitting(true);
+    const user = await login();
+    setSubmitting(false);
+    if (!user) {
+      return;
+    }
+    if (user.SGid === 0) {
+      navigation.navigate('admin-hub');
+      return;
+    }
+    navigation.navigate('game-type');
+  };
+
+  return (
+    <View style={styles.container}>
+      <Text style={styles.title}>Login</Text>
+      <TextInput
+        style={styles.input}
+        placeholder="Email"
+        autoCapitalize="none"
+        keyboardType="email-address"
+        value={email}
+        onChangeText={setEmail}
+      />
+      <TextInput
+        style={styles.input}
+        placeholder="Password"
+        secureTextEntry
+        value={password}
+        onChangeText={setPassword}
+      />
+      <View style={styles.row}>
+        <Pressable style={styles.leftButton} onPress={() => navigation.navigate('register')}>
+          <Text style={styles.buttonText}>Register</Text>
+        </Pressable>
+        <Pressable style={styles.rightButton} onPress={handleLogin}>
+          <Text style={styles.buttonText}>{submitting ? 'Logging in...' : 'Login'}</Text>
+        </Pressable>
+      </View>
+      {!!error && <Text style={styles.errorText}>{error}</Text>}
+    </View>
+  );
+};
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    padding: 20,
+    justifyContent: 'center',
+    gap: 12,
+    backgroundColor: '#ffffff',
+  },
+  title: {
+    fontSize: 28,
+    fontWeight: '700',
+    marginBottom: 8,
+    color: '#111827',
+  },
+  input: {
+    borderWidth: 1,
+    borderColor: '#d1d5db',
+    borderRadius: 8,
+    paddingHorizontal: 12,
+    paddingVertical: 10,
+  },
+  row: {
+    flexDirection: 'row',
+    gap: 10,
+    marginTop: 4,
+  },
+  leftButton: {
+    flex: 1,
+    backgroundColor: '#4b5563',
+    borderRadius: 8,
+    alignItems: 'center',
+    paddingVertical: 12,
+  },
+  rightButton: {
+    flex: 1,
+    backgroundColor: '#2563eb',
+    borderRadius: 8,
+    alignItems: 'center',
+    paddingVertical: 12,
+  },
+  buttonText: {
+    color: '#ffffff',
+    fontWeight: '600',
+  },
+  errorText: {
+    color: '#dc2626',
+    marginTop: 4,
+  },
+});
+
+export default LoginPage;
+