Add logo image to HomeScreen and back button to HistoryScreen

Author: Ericjr688

a.eyes/assets/logo.png

@@ -80,6 +80,10 @@ export default function HistoryScreen({ navigate }) {
         <MaterialIcons name="arrow-back" size={24} color="white" />
         <Text style={styles.backText}>Back</Text>
       </TouchableOpacity>
+      <TouchableOpacity style={styles.backButton} onPress={() => navigate('Camera')}>
+        <MaterialIcons name="camera-alt" size={24} color="white" />
+        <Text style={styles.backText}>Camera</Text>
+      </TouchableOpacity>
     </View>
   );
 }

a.eyes/screens/HistoryScreens.js

@@ -9,7 +9,11 @@ export default function HomeScreen({ navigate }) {
       <StatusBar style="dark" />
 
       <View style={styles.header}>
-        <MaterialIcons name="visibility" size={80} color="#3498db" />
+        <Image 
+          source={require('../assets/logo.png')} 
+          style={{ width: 150, height: 150}}
+          accessibilityLabel="A.Eyes logo"
+          accessibilityHint="Logo of A.Eyes application"></Image>
         <Text style={styles.title}>A.Eyes</Text>
         <Text style={styles.subtitle}>Vision Assistant for the Visually Impaired</Text>
       </View>