Correction des fichiers manquants

src/contexts/ThemeContext.tsx

@@ -0,0 +1,69 @@
+import React, { createContext, useContext, useState, useEffect, ReactNode } from 'react';
+
+type Theme = 'light' | 'dark';
+
+interface ThemeContextType {
+  theme: Theme;
+  toggleTheme: () => void;
+  setTheme: (theme: Theme) => void;
+}
+
+const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
+
+export const useThemeContext = () => {
+  const context = useContext(ThemeContext);
+  if (context === undefined) {
+    throw new Error('useThemeContext must be used within a ThemeProvider');
+  }
+  return context;
+};
+
+interface ThemeProviderProps {
+  children: ReactNode;
+}
+
+export const ThemeProvider: React.FC<ThemeProviderProps> = ({ children }) => {
+  const [theme, setThemeState] = useState<Theme>('light');
+
+  useEffect(() => {
+    // Load theme from localStorage or system preference
+    const savedTheme = localStorage.getItem('theme') as Theme;
+    if (savedTheme) {
+      setThemeState(savedTheme);
+    } else {
+      const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
+      setThemeState(prefersDark ? 'dark' : 'light');
+    }
+  }, []);
+
+  useEffect(() => {
+    // Apply theme to document
+    const root = document.documentElement;
+    if (theme === 'dark') {
+      root.classList.add('dark');
+    } else {
+      root.classList.remove('dark');
+    }
+    localStorage.setItem('theme', theme);
+  }, [theme]);
+
+  const toggleTheme = () => {
+    setThemeState(prev => prev === 'light' ? 'dark' : 'light');
+  };
+
+  const setTheme = (newTheme: Theme) => {
+    setThemeState(newTheme);
+  };
+
+  const value: ThemeContextType = {
+    theme,
+    toggleTheme,
+    setTheme,
+  };
+
+  return (
+    <ThemeContext.Provider value={value}>
+      {children}
+    </ThemeContext.Provider>
+  );
+};