✨Feat: 공통 사용자 프로필 구현

src/app/globals.css

@@ -28,6 +28,9 @@ body {
 .Text-gray {
   @apply text-[#787486] dark:text-[#BCBCBC];
 }
+.Text-white {
+  @apply text-[#FFFFFF] dark:text-[#333236];
+}
 .Border-btn {
   @apply border border-[#D9D9D9] dark:border-[#747474];
 }

src/app/shared/components/common/Profile.tsx

@@ -0,0 +1,81 @@
+'use client'
+
+import Image from 'next/image'
+import { useUserStore } from '@store/useUserStore'
+
+type ProfileProps = {
+  nickname: string
+  imageUrl?: string
+  size?: number
+}
+
+const customColors = [
+  '#efaa8d',
+  '#FFC85A',
+  '#b9ef8d',
+  '#8eef8d',
+  '#8defd3',
+  '#8dcaef',
+  '#8d9def',
+  '#a58def',
+  '#e292e0',
+]
+
+// 첫 글자로 사용자 프로필 생성하는 함수
+function getInitial(nickname: string): string {
+  const firstChar = nickname.trim().charAt(0)
+
+  if (/[a-zA-Z]/.test(firstChar)) {
+    return firstChar.toUpperCase() // 영어: 대문자
+  }
+
+  if (/[가-힣]/.test(firstChar)) {
+    return firstChar // 한글은 그대로 반환
+  }
+
+  return '?' // 기타문자: 물음표
+}
+
+// 닉네임으로부터 배경색 생성 함수
+function getColor(nickname: string): string {
+  const hash = nickname
+    .split('')
+    .reduce((acc, char) => acc + char.charCodeAt(0), 0)
+  return customColors[hash % customColors.length]
+}
+
+export function Profile({ nickname, imageUrl, size = 36 }: ProfileProps) {
+  const initial = getInitial(nickname)
+  const bgColor = getColor(nickname)
+
+  const { user } = useUserStore()
+
+  return imageUrl ? (
+    <div className="flex items-center gap-4">
+      <div className="relative size-48 overflow-hidden rounded-full">
+        <Image
+          src="/images/profile.gif"
+          fill
+          alt="프로필 이미지"
+          className="size-full object-cover"
+        />
+      </div>
+      <span className="text-sm font-semibold">사{user?.name}</span>
+    </div>
+  ) : (
+    <>
+      <div
+        className="ml-8 flex items-center justify-center rounded-full font-semibold text-white"
+        style={{
+          width: size,
+          height: size,
+          fontSize: size * 0.4, // 글자 크기 조정
+          backgroundColor: bgColor,
+        }}
+      >
+        {initial}
+      </div>
+      <div className="text-base font-medium">{nickname}</div>
+    </>
+  )
+}

src/app/shared/components/common/header/Header.tsx

@@ -2,19 +2,21 @@
 
 import { useUserStore } from '@store/useUserStore' // Zustand 예시
 import { usePathname, useRouter } from 'next/navigation'
+import { cn } from '@lib/cn' // 클래스 이름 병합 유틸리티
 import Link from 'next/link'
 import Image from 'next/image'
+import { Profile } from '@components/common/Profile'
 
 export default function Header() {
   const pathname = usePathname()
   const router = useRouter()
   const goToMypage = () => {
     router.push('/mypage')
   }
-  const { user, logout } = useUserStore() // Zustand 상태
+  const { logout } = useUserStore() // Zustand 상태
 
   return (
-    <header className="flex items-center justify-between border-b border-gray-200 bg-white px-36 py-16 dark:border-gray-700 dark:bg-black">
+    <header className="BG-White Border-section Text-black flex items-center justify-between border-b px-36 py-16">
       {/* 좌측 대시보드명 */}
       <div className="flex items-center gap-8">
         <div className="font-bold">대시보드 명</div>
@@ -24,12 +26,15 @@ export default function Header() {
       </div>
 
       {/* 우측 사용자 정보/다크모드 */}
-      <div className="flex items-center gap-16">
+      <div className="flex items-center gap-8">
         <>
           <nav className="hidden gap-8 text-sm text-gray-600 dark:text-gray-300 md:flex">
             <Link
               href="/dashboard"
-              className={`flex items-center gap-6 rounded-md border-2 border-solid px-8 py-4 ${pathname === '/dashboard' ? 'font-semibold' : ''}`}
+              className={cn(
+                'Border-btn flex items-center gap-6 rounded-md border-solid px-12 py-6',
+                pathname === '/dashboard' && 'font-semibold',
+              )}
             >
               <div className="relative flex size-12">
                 <Image src="/images/management.png" fill alt="관리 버튼" />
@@ -38,7 +43,10 @@ export default function Header() {
             </Link>
             <Link
               href="/modal"
-              className={`flex items-center gap-6 rounded-6 border-2 border-solid px-8 py-4 ${pathname === '/modal' ? 'font-semibold' : ''}`}
+              className={cn(
+                'Border-btn mr-16 flex items-center gap-6 rounded-6 border-solid px-12 py-6',
+                pathname === '/modal' && 'font-semibold',
+              )}
             >
               <div className="relative flex size-12">
                 <Image src="/images/invitation.png" fill alt="초대 버튼" />
@@ -47,15 +55,7 @@ export default function Header() {
             </Link>
           </nav>
           {/* 공동작업자 프로필 이미지 */}
-          <div className="relative size-48 overflow-hidden rounded-full">
-            <Image
-              src="/images/collaborator.png"
-              fill
-              alt="초대된 사용자"
-              style={{ objectFit: 'cover' }}
-            />
-          </div>
-          <div className="relative size-48 overflow-hidden rounded-full">
+          <div className="relative mx-16 size-48 overflow-hidden rounded-full">
             <Image
               src="/images/collaborator.png"
               fill
@@ -64,15 +64,7 @@ export default function Header() {
             />
           </div>
           |{/* 내 프로필 이미지 */}
-          <div className="relative size-48 overflow-hidden rounded-full">
-            <Image
-              src="/images/profile.gif"
-              fill
-              alt="프로필이미지"
-              style={{ objectFit: 'cover' }}
-            />
-          </div>
-          <span className="text-sm">배유철 {user?.name}</span>
+          <Profile nickname="전유진" />
           {/* 드롭다운 메뉴 */}
           <button onClick={goToMypage} className="text-xs">
             마이페이지

src/app/shared/lib/cn.ts

@@ -0,0 +1,6 @@
+import { clsx, type ClassValue } from 'clsx'
+import { twMerge } from 'tailwind-merge'
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}

src/app/shared/store/useUserStore.ts

@@ -2,7 +2,7 @@
 import { create } from 'zustand'
 import { persist } from 'zustand/middleware'
 
-import { User } from '../types/User.interface'
+import { User } from '../types/user.type'
 
 interface UserState {
   user: User | null

tsconfig.json

@@ -25,7 +25,8 @@
       "@/*": ["./src/*"],
       "@components/*": ["./src/app/shared/components/*"],
       "@store/*": ["./src/app/shared/store/*"],
-      "@hooks/*": ["./src/app/shared/hooks/*"]
+      "@hooks/*": ["./src/app/shared/hooks/*"],
+      "@lib/*": ["./src/app/shared/lib/*"]
     }
   },
   "include": [