Clean up header. Add theme.

app/(tabs)/index.tsx

@@ -1,18 +1,22 @@
 import { Image, StyleSheet, Platform } from 'react-native';
 import ParallaxScrollView from '@/components/default/ParallaxScrollView';
 import { ThemedText, ThemedView } from '@/components/theme/Theme';
+import { Colors } from '@/constants/Colors';
+import { useColorScheme } from '@/hooks/useColorScheme';
 
 const HomeScreen = () => {
+  const scheme = useColorScheme() ?? 'dark';
   return (
     <ParallaxScrollView
-      headerBackgroundColor={{ light: '#A1CEDC', dark: '#1D3D47' }}
-      headerHeight={200}
       headerImage={
         <Image
-          source={require('@/assets/images/partial-react-logo.png')}
+          source={require('@/assets/images/tech_tracker_logo.png')}
           style={styles.reactLogo}
         />
       }
+      headerTitle={
+        <ThemedText type='title' style={styles.headerTitle}>Tech Tracker</ThemedText>
+      }
     >
       <ThemedView style={styles.titleContainer}>
         <ThemedText type='title'>Welcome!</ThemedText>
@@ -64,10 +68,20 @@ const styles = StyleSheet.create({
     marginBottom: 8,
   },
   reactLogo: {
-    height: 178,
-    width: 290,
-    bottom: 0,
-    left: 0,
+    height: 80,
+    width: 82,
+    bottom: 10,
+    left: 10,
     position: 'absolute',
   },
+  headerTitle: {
+    position: 'absolute',
+    bottom: 20,
+    left: 40,
+    right: 0,
+    textAlign: 'center',
+    fontSize: 48,
+    lineHeight: 64,
+    fontWeight: 'bold',
+  },
 });

app/(tabs)/settings.tsx

@@ -44,7 +44,7 @@ const TabTwoScreen = () => {
           <ThemedText type='defaultSemiBold'>@3x</ThemedText> suffixes to provide files for
           different screen densities
         </ThemedText>
-        <Image source={require('@/assets/images/react-logo.png')} style={{ alignSelf: 'center' }} />
+        <Image source={require('@/assets/images/tech_tracker_logo.png')} style={{ alignSelf: 'center' }} />
         <ExternalLink href='https://reactnative.dev/docs/images'>
           <ThemedText type='link'>Learn more</ThemedText>
         </ExternalLink>