[Feature] 라이트모드 추가

app/entities/common/Button/IconButton.tsx

@@ -0,0 +1,30 @@
+import { IconType } from 'react-icons';
+
+interface IconButtonProps {
+  Icon: IconType;
+  text?: string;
+  size?: number;
+  className?: string;
+  onClick?: () => void;
+}
+
+const IconButton = ({
+  Icon,
+  text,
+  size,
+  className,
+  onClick,
+}: IconButtonProps) => {
+  return (
+    <button
+      onClick={onClick}
+      className={
+        className || 'p-4 fill-current hover:bg-gray-200/50 rounded-md'
+      }
+    >
+      <Icon size={size || 20} />
+      {text && <span>{text}</span>}
+    </button>
+  );
+};
+export default IconButton;

app/entities/common/NavBar.tsx

@@ -4,8 +4,13 @@ import { useEffect, useState } from 'react';
 import Profile from '@/app/entities/common/Profile';
 
 import profile from '@/app/public/profile.jpg';
+import IconButton from '@/app/entities/common/Button/IconButton';
+import { FaRegMoon, FaRegSun } from 'react-icons/fa';
+import useTheme from '@/app/hooks/useTheme';
+import { IoMoonSharp, IoSunny, IoSunnySharp } from 'react-icons/io5';
 const NavBar = () => {
   const [isFixed, setIsFixed] = useState(false);
+  const { theme, toggleTheme } = useTheme();
 
   useEffect(() => {
     const handleScroll = () => {
@@ -36,7 +41,11 @@ const NavBar = () => {
             <Profile profileThumbnail={profile} username={'Jeongwoo Seo'} />
           </Link>
         </div>
-        <ul className={'inline-flex max-w-5xl w-full justify-end gap-6 '}>
+        <ul
+          className={
+            'inline-flex max-w-5xl w-full justify-end gap-4 items-center'
+          }
+        >
           <li>
             <Link href="/posts">Blog</Link>
           </li>
@@ -46,6 +55,13 @@ const NavBar = () => {
           <li>
             <Link href="/portfolio">Portfolio</Link>
           </li>
+          <li>
+            <IconButton
+              onClick={toggleTheme}
+              Icon={theme === 'light' ? IoSunnySharp : IoMoonSharp}
+              size={20}
+            />
+          </li>
         </ul>
       </div>
     </nav>

app/entities/post/detail/PostBody.tsx

@@ -2,13 +2,15 @@
 import LoadingIndicator from '@/app/entities/common/Loading/LoadingIndicator';
 import MDEditor from '@uiw/react-md-editor';
 import PostTOC from '@/app/entities/post/detail/PostTOC';
+import useTheme from '@/app/hooks/useTheme';
 
 interface Props {
   content: string;
   loading?: boolean;
 }
 
 const PostBody = ({ content, loading }: Props) => {
+  const { theme } = useTheme();
   return (
     <div
       className={'max-w-full post-body px-4 py-16 min-h-[500px] relative    '}
@@ -27,7 +29,7 @@ const PostBody = ({ content, loading }: Props) => {
             className={''}
             source={content}
             wrapperElement={{
-              'data-color-mode': 'dark',
+              'data-color-mode': theme,
             }}
           />
           <PostTOC postContent={content || ''} />

app/entities/post/detail/PostHeader.tsx

@@ -47,7 +47,7 @@ const PostHeader = ({
   return (
     <div
       className={
-        'post-header h-[220px] md:h-[292px] relative overflow-hidden w-full text-center bg-gray-400/50'
+        'post-header h-[220px] md:h-[292px] relative overflow-hidden w-full text-center bg-gray-400/40 text-white'
       }
     >
       <h1 className={'font-bold mb-4 pt-10 md:pt-20 text-3xl md:text-5xl '}>

app/entities/post/detail/PostTOC.tsx

@@ -12,7 +12,7 @@ const PostTOC = ({ postContent }: { postContent: string }) => {
   };
 
   return (
-    <div className="fixed post-toc hidden 2xl:block w-[280px] top-[calc(50%+100px)] -translate-y-1/2 left-[calc(50%+524px)]  transition-all  text-sm bg-gray-100/80 rounded-md p-4 text-black">
+    <div className="absolute post-toc hidden 2xl:block w-[280px] top-20 left-full ml-16  transition-all  text-sm bg-gray-100/80 rounded-md p-4 text-black">
       <h4 className={'text-xl font-bold mb-2'}>📌 Table of Contents</h4>
       <ul className={'list-none'}>
         {parseHeadings(postContent).map((heading) => {

app/hooks/useTheme.ts

@@ -0,0 +1,21 @@
+import useThemeStore from '@/app/stores/useThemeStore';
+import { useEffect } from 'react';
+
+const useTheme = () => {
+  const { theme, setTheme } = useThemeStore();
+  const toggleTheme = () => {
+    setTheme(theme === 'light' ? 'dark' : 'light');
+  };
+
+  useEffect(() => {
+    if (theme === 'dark') {
+      document.body.classList.add('dark');
+    } else {
+      document.body.classList.remove('dark');
+    }
+  }, [theme]);
+
+  return { theme, toggleTheme };
+};
+
+export default useTheme;

app/page.tsx

@@ -41,7 +41,7 @@ export default function Home() {
             Frontend Developer
           </h1>
         </div>
-        <p className="text-lg text-gray-200 max-w-2xl">
+        <p className="text-lg text-default max-w-2xl">
           안녕하세요, 서정우입니다. 사용자 경험과 깔끔한 코드 작성에 중점을 두고
           있으며, 멈추지 않는 기술의 변화를 즐깁니다.
         </p>
@@ -60,22 +60,22 @@ export default function Home() {
         </div>
         <div className="grid gap-4">
           <h2 className="text-2xl font-semibold">About Me</h2>
-          <p className="text-gray-200">
+          <p className="text-default">
             프론트엔드 개발자로서 React, Next.js, TypeScript를 주로 사용합니다.
             항상 사용자 입장에서 생각하고, 성능 최적화에 관심이 많으며, 지속적인
             학습과 성장을 추구합니다.
           </p>
           <div className="flex gap-4">
             <a href={'https://github.com/ShipFriend0516'} target={'_blank'}>
-              <FaGithub className="w-5 h-5 text-gray-200 hover:text-gray-100 hover:scale-125 transition cursor-pointer" />
+              <FaGithub className="w-5 h-5 text-default hover:text-gray-100 hover:scale-125 transition cursor-pointer" />
             </a>
             <a
               href={
                 'https://www.linkedin.com/in/%EC%A0%95%EC%9A%B0-%EC%84%9C-9a0b79312/'
               }
               target={'_blank'}
             >
-              <FaLinkedin className="w-5 h-5 text-gray-200 hover:text-gray-100 hover:scale-125 transition cursor-pointer" />
+              <FaLinkedin className="w-5 h-5 text-default hover:text-gray-100 hover:scale-125 transition cursor-pointer" />
             </a>
           </div>
         </div>
@@ -107,7 +107,7 @@ export default function Home() {
                   />
                 </div>
                 <h3 className="font-medium mb-2">{post.title}</h3>
-                <p className="text-sm text-gray-200">
+                <p className="text-sm text-default">
                   {post.subTitle && post.subTitle.slice(0, 80)}
                 </p>
               </Link>

app/stores/useThemeStore.ts

@@ -0,0 +1,23 @@
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+type Theme = 'light' | 'dark';
+
+interface ThemeState {
+  theme: 'light' | 'dark';
+  setTheme: (theme: Theme) => void;
+}
+
+const useThemeStore = create(
+  persist<ThemeState>(
+    (set) => ({
+      theme: 'dark',
+      setTheme: (theme: Theme) => set({ theme }),
+    }),
+    {
+      name: 'theme-storage',
+    }
+  )
+);
+
+export default useThemeStore;