fix: standardize punctuation in tooltips and comments across multiple locales and code files

components/providers/theme-provider.tsx

@@ -10,5 +10,20 @@ export function ThemeProvider({ children }: { children: React.ReactNode }) {
     initializeTheme();
   }, [initializeTheme]);
 
+  useEffect(() => {
+    if (process.env.NODE_ENV === 'production') return;
+
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if ((e.ctrlKey || e.metaKey) && e.shiftKey && e.key.toLowerCase() === 'l') {
+        e.preventDefault();
+        const { resolvedTheme, setTheme } = useThemeStore.getState();
+        setTheme(resolvedTheme === 'dark' ? 'light' : 'dark');
+      }
+    };
+
+    window.addEventListener('keydown', handleKeyDown);
+    return () => window.removeEventListener('keydown', handleKeyDown);
+  }, []);
+
   return <>{children}</>;
 }