resolve issues from code review

Author: den-ua

docs/examples/react-native/RNThemisExample/App.tsx

@@ -52,6 +52,13 @@ type SectionProps = {
   title: string;
 };
 
+  const Colors = {
+    white: '#FFFFFF',
+    black: '#000000',
+    darker: '#333333',
+    lighter: '#b2b2b2',
+  } as const;
+
 const Section: React.FC<SectionProps> = ({ children, title }) => {
   const isDarkMode = useColorScheme() === 'dark';
   return (
@@ -60,7 +67,7 @@ const Section: React.FC<SectionProps> = ({ children, title }) => {
         style={[
           styles.sectionTitle,
           {
-            color: isDarkMode ? '#F5FCFF' : '#94cce3',
+            color: isDarkMode ? Colors.white : Colors.black,
           },
         ]}>
         {title}
@@ -69,7 +76,7 @@ const Section: React.FC<SectionProps> = ({ children, title }) => {
         style={[
           styles.sectionDescription,
           {
-            color: isDarkMode ? '#F5FCFF' : '#94cce3',
+            color: isDarkMode ? Colors.textDark : Colors.textLight,
           },
         ]}>
         {children}
@@ -82,7 +89,7 @@ const App: React.FC = () => {
   const isDarkMode = useColorScheme() === 'dark';
 
   const backgroundStyle = {
-    backgroundColor: isDarkMode ? '#F5FCFF' : '#94cce3',
+    backgroundColor: isDarkMode ? Colors.darker : Colors.lighter,
   };
 
   const [privateKey, setPrivateKey] = useState<string>('');
@@ -318,7 +325,7 @@ const App: React.FC = () => {
         style={ backgroundStyle }>
         <View
           style={ {
-            backgroundColor: isDarkMode ? '#F5FCFF' : '#F5FCFF',
+            backgroundColor: isDarkMode ? Colors.black : Colors.white,
           } }>
           <Section title="Asymmetric Keys">
             <View>

docs/examples/react-native/RNThemisExample/package.json

@@ -14,7 +14,7 @@
     "react": "19.2.0",
     "react-native": "0.83.0",
     "react-native-safe-area-context": "^5.5.2",
-    "react-native-themis": "file:../../../AndroidStudioProjects/themis/src/wrappers/themis/react-native-themis/react-native-themis-0.15.5.tgz"
+    "react-native-themis": "0.15.5"
   },
   "devDependencies": {
     "@babel/core": "^7.25.2",