feat: SAPIENS Mobile App - Initial commit

React Native mobile application for SAPIENS news platform.
Consolidated all previous history into single commit.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

sapiense-ai-app/contexts/LanguageContext.tsx

@@ -0,0 +1,26 @@
+import React, { createContext, useContext, useState, ReactNode } from 'react';
+
+interface LanguageContextType {
+  language: string;
+  setLanguage: (language: string) => void;
+}
+
+const LanguageContext = createContext<LanguageContextType | undefined>(undefined);
+
+export function LanguageProvider({ children }: { children: ReactNode }) {
+  const [language, setLanguage] = useState('ko');
+
+  return (
+    <LanguageContext.Provider value={{ language, setLanguage }}>
+      {children}
+    </LanguageContext.Provider>
+  );
+}
+
+export function useLanguage() {
+  const context = useContext(LanguageContext);
+  if (context === undefined) {
+    throw new Error('useLanguage must be used within a LanguageProvider');
+  }
+  return context;
+}