Initial commit: Complete NodeJS-native setup

- Migrated from Python pre-commit to NodeJS-native solution
- Reorganized documentation structure
- Set up Husky + lint-staged for efficient pre-commit hooks
- Fixed Dockerfile healthcheck issue
- Added comprehensive documentation index

hooks/useLocalStorage.ts

@@ -0,0 +1,29 @@
+// FIX: This file was empty. Added a standard implementation for the useLocalStorage hook.
+import { useState, useEffect, Dispatch, SetStateAction } from 'react';
+
+function getStoredValue<T>(key: string, defaultValue: T): T {
+  if (typeof window === 'undefined') {
+    return defaultValue;
+  }
+  const saved = localStorage.getItem(key);
+  try {
+    return saved ? JSON.parse(saved) : defaultValue;
+  } catch (e) {
+    return defaultValue;
+  }
+}
+
+export function useLocalStorage<T>(
+  key: string,
+  defaultValue: T
+): [T, Dispatch<SetStateAction<T>>] {
+  const [value, setValue] = useState<T>(() =>
+    getStoredValue(key, defaultValue)
+  );
+
+  useEffect(() => {
+    localStorage.setItem(key, JSON.stringify(value));
+  }, [key, value]);
+
+  return [value, setValue];
+}