fix: force light theme during PDF generation to avoid dark background

context/ThemeContext.tsx

@@ -23,6 +23,24 @@ export const ThemeProvider: React.FC<{ children: ReactNode }> = ({ children }) =
     root.classList.remove('light', 'dark');
     root.classList.add(theme);
     localStorage.setItem('theme', theme);
+
+    const handleBeforePrint = () => {
+      root.classList.remove('dark');
+      root.classList.add('light');
+    };
+
+    const handleAfterPrint = () => {
+      root.classList.remove('light', 'dark');
+      root.classList.add(theme);
+    };
+
+    window.addEventListener('beforeprint', handleBeforePrint);
+    window.addEventListener('afterprint', handleAfterPrint);
+
+    return () => {
+      window.removeEventListener('beforeprint', handleBeforePrint);
+      window.removeEventListener('afterprint', handleAfterPrint);
+    };
   }, [theme]);
 
   const toggleTheme = () => {