diff --git a/README.md b/README.md
index 3a2a8b4..9d3ee8d 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Galaxy-PO
+# Galaxis-Po
 
 Integrated Quant Portfolio Management Application
 
@@ -37,7 +37,7 @@ npm run dev
 ## Project Structure
 
 ```
-galaxy-po/
+galaxis-po/
 ├── backend/           # FastAPI backend
 ├── frontend/          # Next.js frontend
 ├── docker-compose.yml
diff --git a/backend/app/core/config.py b/backend/app/core/config.py
index db1b4f4..a24bc27 100644
--- a/backend/app/core/config.py
+++ b/backend/app/core/config.py
@@ -7,7 +7,7 @@ from functools import lru_cache
 
 class Settings(BaseSettings):
     # Application
-    app_name: str = "Galaxy-PO"
+    app_name: str = "Galaxis-Po"
     debug: bool = False
 
     # Database
diff --git a/backend/app/main.py b/backend/app/main.py
index 16f4753..9e106f2 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -1,5 +1,5 @@
 """
-Galaxy-PO Backend API
+Galaxis-Po Backend API
 """
 import logging
 from contextlib import asynccontextmanager
@@ -24,7 +24,7 @@ logger = logging.getLogger(__name__)
 async def lifespan(app: FastAPI):
     """Application lifespan manager."""
     # Startup
-    logger.info("Starting Galaxy-PO API...")
+    logger.info("Starting Galaxis-Po API...")
 
     # Start scheduler (import here to avoid circular imports)
     try:
@@ -37,7 +37,7 @@ async def lifespan(app: FastAPI):
     yield
 
     # Shutdown
-    logger.info("Shutting down Galaxy-PO API...")
+    logger.info("Shutting down Galaxis-Po API...")
 
     try:
         from jobs.scheduler import stop_scheduler
@@ -48,7 +48,7 @@ async def lifespan(app: FastAPI):
 
 
 app = FastAPI(
-    title="Galaxy-PO API",
+    title="Galaxis-Po API",
     description="Quant Portfolio Management API",
     version="0.1.0",
     lifespan=lifespan,
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 0daf15f..c039e4d 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
-name = "galaxy-po-backend"
+name = "galaxis-po-backend"
 version = "1.0.0"
-description = "Galaxy Portfolio Optimization Backend"
+description = "Galaxis Portfolio Optimization Backend"
 requires-python = ">=3.12"
 dependencies = [
     "fastapi==0.115.6",
@@ -9,12 +9,14 @@ dependencies = [
     "sqlalchemy==2.0.36",
     "alembic==1.14.0",
     "psycopg2-binary==2.9.10",
-    "pydantic==2.10.4",
+    "pydantic[email]==2.10.4",
     "pydantic-settings==2.7.1",
     "python-jose[cryptography]==3.3.0",
     "passlib[bcrypt]==1.7.4",
+    "bcrypt==4.0.1",
     "python-multipart==0.0.20",
     "apscheduler==3.10.4",
+    "setuptools",
     "pykrx==1.0.45",
     "requests==2.32.3",
     "beautifulsoup4==4.12.3",
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 288819d..3bbc8d4 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -4,7 +4,7 @@
 services:
   postgres:
     image: postgres:15-alpine
-    container_name: galaxy-po-db
+    container_name: galaxis-po-db
     environment:
       POSTGRES_USER: ${DB_USER}
       POSTGRES_PASSWORD: ${DB_PASSWORD}
@@ -24,7 +24,7 @@ services:
     build:
       context: ./backend
       dockerfile: Dockerfile
-    container_name: galaxy-po-backend
+    container_name: galaxis-po-backend
     env_file:
       - .env.prod
     environment:
@@ -42,7 +42,7 @@ services:
       context: ./frontend
       dockerfile: Dockerfile
       target: production
-    container_name: galaxy-po-frontend
+    container_name: galaxis-po-frontend
     environment:
       NEXT_PUBLIC_API_URL: ${API_URL}
     depends_on:
@@ -54,7 +54,7 @@ services:
 
   nginx:
     image: nginx:alpine
-    container_name: galaxy-po-nginx
+    container_name: galaxis-po-nginx
     ports:
       - "80:80"
       - "443:443"
diff --git a/docker-compose.yml b/docker-compose.yml
index 7c20339..196fb3b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,7 +1,7 @@
 services:
   postgres:
     image: postgres:15-alpine
-    container_name: galaxy-po-db
+    container_name: galaxis-po-db
     environment:
       POSTGRES_USER: ${DB_USER:-galaxy}
       POSTGRES_PASSWORD: ${DB_PASSWORD:-devpassword}
@@ -21,7 +21,7 @@ services:
     build:
       context: ./backend
       dockerfile: Dockerfile
-    container_name: galaxy-po-backend
+    container_name: galaxis-po-backend
     env_file:
       - .env
     environment:
@@ -50,7 +50,7 @@ services:
       context: ./frontend
       dockerfile: Dockerfile
       target: development
-    container_name: galaxy-po-frontend
+    container_name: galaxis-po-frontend
     environment:
       NEXT_PUBLIC_API_URL: http://localhost:8000
     ports:
diff --git a/docs/plans/2026-02-05-phase1-foundation.md b/docs/plans/2026-02-05-phase1-foundation.md
new file mode 100644
index 0000000..d15c7b3
--- /dev/null
+++ b/docs/plans/2026-02-05-phase1-foundation.md
@@ -0,0 +1,611 @@
+# Phase 1: 기반 작업 구현 계획
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** shadcn/ui, next-themes, Lucide Icons를 설치하고 다크/라이트 테마 시스템을 구축한다.
+
+**Architecture:** Next.js App Router의 layout.tsx에 ThemeProvider를 적용하고, shadcn/ui의 CSS 변수 기반 테마 시스템을 사용한다. Tailwind CSS 4 환경에 맞게 설정한다.
+
+**Tech Stack:** Next.js 16, React 19, Tailwind CSS 4, shadcn/ui, next-themes, lucide-react
+
+---
+
+## Task 1: shadcn/ui 초기화 및 설정
+
+**Files:**
+- Create: `frontend/components.json`
+- Create: `frontend/src/lib/utils.ts`
+- Modify: `frontend/package.json`
+- Modify: `frontend/src/app/globals.css`
+- Modify: `frontend/tailwind.config.ts` (새로 생성)
+
+**Step 1: 필수 의존성 설치**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm install class-variance-authority clsx tailwind-merge
+npm install -D tailwindcss@latest postcss autoprefixer
+```
+
+Expected: 패키지 설치 완료
+
+**Step 2: tailwind.config.ts 생성**
+
+Create `frontend/tailwind.config.ts`:
+
+```typescript
+import type { Config } from "tailwindcss";
+
+const config: Config = {
+  darkMode: ["class"],
+  content: [
+    "./src/pages/**/*.{js,ts,jsx,tsx,mdx}",
+    "./src/components/**/*.{js,ts,jsx,tsx,mdx}",
+    "./src/app/**/*.{js,ts,jsx,tsx,mdx}",
+  ],
+  theme: {
+    extend: {
+      colors: {
+        border: "hsl(var(--border))",
+        input: "hsl(var(--input))",
+        ring: "hsl(var(--ring))",
+        background: "hsl(var(--background))",
+        foreground: "hsl(var(--foreground))",
+        primary: {
+          DEFAULT: "hsl(var(--primary))",
+          foreground: "hsl(var(--primary-foreground))",
+        },
+        secondary: {
+          DEFAULT: "hsl(var(--secondary))",
+          foreground: "hsl(var(--secondary-foreground))",
+        },
+        destructive: {
+          DEFAULT: "hsl(var(--destructive))",
+          foreground: "hsl(var(--destructive-foreground))",
+        },
+        muted: {
+          DEFAULT: "hsl(var(--muted))",
+          foreground: "hsl(var(--muted-foreground))",
+        },
+        accent: {
+          DEFAULT: "hsl(var(--accent))",
+          foreground: "hsl(var(--accent-foreground))",
+        },
+        popover: {
+          DEFAULT: "hsl(var(--popover))",
+          foreground: "hsl(var(--popover-foreground))",
+        },
+        card: {
+          DEFAULT: "hsl(var(--card))",
+          foreground: "hsl(var(--card-foreground))",
+        },
+      },
+      borderRadius: {
+        lg: "var(--radius)",
+        md: "calc(var(--radius) - 2px)",
+        sm: "calc(var(--radius) - 4px)",
+      },
+    },
+  },
+  plugins: [],
+};
+
+export default config;
+```
+
+**Step 3: postcss.config.mjs 수정**
+
+Modify `frontend/postcss.config.mjs`:
+
+```javascript
+const config = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};
+
+export default config;
+```
+
+**Step 4: globals.css를 shadcn/ui 테마로 교체**
+
+Replace `frontend/src/app/globals.css`:
+
+```css
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@layer base {
+  :root {
+    --background: 0 0% 100%;
+    --foreground: 222.2 84% 4.9%;
+    --card: 0 0% 100%;
+    --card-foreground: 222.2 84% 4.9%;
+    --popover: 0 0% 100%;
+    --popover-foreground: 222.2 84% 4.9%;
+    --primary: 221.2 83.2% 53.3%;
+    --primary-foreground: 210 40% 98%;
+    --secondary: 210 40% 96.1%;
+    --secondary-foreground: 222.2 47.4% 11.2%;
+    --muted: 210 40% 96.1%;
+    --muted-foreground: 215.4 16.3% 46.9%;
+    --accent: 210 40% 96.1%;
+    --accent-foreground: 222.2 47.4% 11.2%;
+    --destructive: 0 84.2% 60.2%;
+    --destructive-foreground: 210 40% 98%;
+    --border: 214.3 31.8% 91.4%;
+    --input: 214.3 31.8% 91.4%;
+    --ring: 221.2 83.2% 53.3%;
+    --radius: 0.5rem;
+  }
+
+  .dark {
+    --background: 222.2 84% 4.9%;
+    --foreground: 210 40% 98%;
+    --card: 222.2 84% 4.9%;
+    --card-foreground: 210 40% 98%;
+    --popover: 222.2 84% 4.9%;
+    --popover-foreground: 210 40% 98%;
+    --primary: 217.2 91.2% 59.8%;
+    --primary-foreground: 222.2 47.4% 11.2%;
+    --secondary: 217.2 32.6% 17.5%;
+    --secondary-foreground: 210 40% 98%;
+    --muted: 217.2 32.6% 17.5%;
+    --muted-foreground: 215 20.2% 65.1%;
+    --accent: 217.2 32.6% 17.5%;
+    --accent-foreground: 210 40% 98%;
+    --destructive: 0 62.8% 30.6%;
+    --destructive-foreground: 210 40% 98%;
+    --border: 217.2 32.6% 17.5%;
+    --input: 217.2 32.6% 17.5%;
+    --ring: 224.3 76.3% 48%;
+  }
+}
+
+@layer base {
+  * {
+    @apply border-border;
+  }
+  body {
+    @apply bg-background text-foreground;
+  }
+}
+```
+
+**Step 5: utils.ts 생성**
+
+Create `frontend/src/lib/utils.ts`:
+
+```typescript
+import { type ClassValue, clsx } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
+```
+
+**Step 6: components.json 생성**
+
+Create `frontend/components.json`:
+
+```json
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "default",
+  "rsc": true,
+  "tsx": true,
+  "tailwind": {
+    "config": "tailwind.config.ts",
+    "css": "src/app/globals.css",
+    "baseColor": "slate",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  }
+}
+```
+
+**Step 7: 빌드 테스트**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm run build
+```
+
+Expected: 빌드 성공
+
+**Step 8: Commit**
+
+```bash
+git add frontend/
+git commit -m "feat(frontend): initialize shadcn/ui configuration
+
+- Add tailwind.config.ts with shadcn/ui theme colors
+- Update globals.css with CSS variables for dark/light mode
+- Add utils.ts with cn() helper function
+- Add components.json for shadcn/ui CLI"
+```
+
+---
+
+## Task 2: next-themes 설치 및 ThemeProvider 설정
+
+**Files:**
+- Modify: `frontend/package.json`
+- Create: `frontend/src/components/providers/theme-provider.tsx`
+- Modify: `frontend/src/app/layout.tsx`
+
+**Step 1: next-themes 설치**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm install next-themes
+```
+
+Expected: 패키지 설치 완료
+
+**Step 2: ThemeProvider 컴포넌트 생성**
+
+Create `frontend/src/components/providers/theme-provider.tsx`:
+
+```typescript
+"use client";
+
+import * as React from "react";
+import { ThemeProvider as NextThemesProvider } from "next-themes";
+
+export function ThemeProvider({
+  children,
+  ...props
+}: React.ComponentProps<typeof NextThemesProvider>) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>;
+}
+```
+
+**Step 3: layout.tsx에 ThemeProvider 적용**
+
+Modify `frontend/src/app/layout.tsx`:
+
+```typescript
+import type { Metadata } from 'next';
+import { Inter } from 'next/font/google';
+import './globals.css';
+import { ThemeProvider } from '@/components/providers/theme-provider';
+
+const inter = Inter({ subsets: ['latin'] });
+
+export const metadata: Metadata = {
+  title: 'Galaxy-PO',
+  description: 'Quant Portfolio Management Application',
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="ko" suppressHydrationWarning>
+      <body className={inter.className}>
+        <ThemeProvider
+          attribute="class"
+          defaultTheme="system"
+          enableSystem
+          disableTransitionOnChange
+        >
+          {children}
+        </ThemeProvider>
+      </body>
+    </html>
+  );
+}
+```
+
+**Step 4: 빌드 테스트**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm run build
+```
+
+Expected: 빌드 성공
+
+**Step 5: Commit**
+
+```bash
+git add frontend/
+git commit -m "feat(frontend): add next-themes for dark/light mode
+
+- Create ThemeProvider component
+- Apply ThemeProvider to root layout
+- Enable system theme detection"
+```
+
+---
+
+## Task 3: Lucide Icons 설치
+
+**Files:**
+- Modify: `frontend/package.json`
+
+**Step 1: lucide-react 설치**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm install lucide-react
+```
+
+Expected: 패키지 설치 완료
+
+**Step 2: Commit**
+
+```bash
+git add frontend/package.json frontend/package-lock.json
+git commit -m "feat(frontend): add lucide-react icons"
+```
+
+---
+
+## Task 4: 핵심 shadcn/ui 컴포넌트 설치
+
+**Files:**
+- Create: `frontend/src/components/ui/button.tsx`
+- Create: `frontend/src/components/ui/card.tsx`
+- Create: `frontend/src/components/ui/dropdown-menu.tsx`
+- Create: `frontend/src/components/ui/sheet.tsx`
+- Create: `frontend/src/components/ui/tooltip.tsx`
+
+**Step 1: shadcn/ui CLI로 컴포넌트 설치**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npx shadcn@latest add button card dropdown-menu sheet tooltip --yes
+```
+
+Expected: 컴포넌트 파일들이 `src/components/ui/`에 생성됨
+
+**Step 2: 빌드 테스트**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm run build
+```
+
+Expected: 빌드 성공
+
+**Step 3: Commit**
+
+```bash
+git add frontend/
+git commit -m "feat(frontend): add core shadcn/ui components
+
+- button, card, dropdown-menu, sheet, tooltip"
+```
+
+---
+
+## Task 5: 테마 토글 컴포넌트 생성
+
+**Files:**
+- Create: `frontend/src/components/ui/theme-toggle.tsx`
+
+**Step 1: ThemeToggle 컴포넌트 생성**
+
+Create `frontend/src/components/ui/theme-toggle.tsx`:
+
+```typescript
+"use client";
+
+import * as React from "react";
+import { Moon, Sun } from "lucide-react";
+import { useTheme } from "next-themes";
+
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+
+export function ThemeToggle() {
+  const { setTheme } = useTheme();
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button variant="ghost" size="icon">
+          <Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
+          <Moon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
+          <span className="sr-only">테마 변경</span>
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end">
+        <DropdownMenuItem onClick={() => setTheme("light")}>
+          라이트
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setTheme("dark")}>
+          다크
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setTheme("system")}>
+          시스템
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}
+```
+
+**Step 2: 빌드 테스트**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm run build
+```
+
+Expected: 빌드 성공
+
+**Step 3: Commit**
+
+```bash
+git add frontend/src/components/ui/theme-toggle.tsx
+git commit -m "feat(frontend): add ThemeToggle component
+
+- Dropdown menu with light/dark/system options
+- Uses Lucide icons for sun/moon"
+```
+
+---
+
+## Task 6: 차트 라이브러리 설치
+
+**Files:**
+- Modify: `frontend/package.json`
+
+**Step 1: Recharts 설치**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm install recharts
+```
+
+Expected: 패키지 설치 완료
+
+**Step 2: TradingView Lightweight Charts 설치**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm install lightweight-charts
+```
+
+Expected: 패키지 설치 완료
+
+**Step 3: Commit**
+
+```bash
+git add frontend/package.json frontend/package-lock.json
+git commit -m "feat(frontend): add chart libraries
+
+- recharts for general charts
+- lightweight-charts for TradingView financial charts"
+```
+
+---
+
+## Task 7: 테스트 페이지로 검증
+
+**Files:**
+- Modify: `frontend/src/app/page.tsx` (임시 수정 후 원복)
+
+**Step 1: 임시 테스트 페이지 생성**
+
+Temporarily modify `frontend/src/app/page.tsx` to test all components:
+
+```typescript
+import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { ThemeToggle } from "@/components/ui/theme-toggle";
+import { Home, Settings, User } from "lucide-react";
+
+export default function TestPage() {
+  return (
+    <div className="min-h-screen p-8 bg-background text-foreground">
+      <div className="max-w-4xl mx-auto space-y-8">
+        <div className="flex justify-between items-center">
+          <h1 className="text-3xl font-bold">Phase 1 테스트</h1>
+          <ThemeToggle />
+        </div>
+
+        <Card>
+          <CardHeader>
+            <CardTitle>shadcn/ui 컴포넌트 테스트</CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            <div className="flex gap-2">
+              <Button>Primary</Button>
+              <Button variant="secondary">Secondary</Button>
+              <Button variant="destructive">Destructive</Button>
+              <Button variant="outline">Outline</Button>
+              <Button variant="ghost">Ghost</Button>
+            </div>
+            <div className="flex gap-4 items-center">
+              <Home className="h-6 w-6" />
+              <Settings className="h-6 w-6" />
+              <User className="h-6 w-6" />
+              <span>Lucide Icons</span>
+            </div>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader>
+            <CardTitle>테마 테스트</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <p className="text-muted-foreground">
+              위의 테마 토글 버튼으로 라이트/다크 모드를 전환해보세요.
+            </p>
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  );
+}
+```
+
+**Step 2: 개발 서버 실행 및 확인**
+
+```bash
+cd /home/zephyrdark/workspace/quant/galaxy-po/frontend
+npm run dev
+```
+
+브라우저에서 http://localhost:3000 접속하여 확인:
+- [ ] 버튼들이 올바르게 렌더링되는가
+- [ ] Lucide 아이콘이 표시되는가
+- [ ] 테마 토글이 작동하는가 (라이트/다크/시스템)
+- [ ] 다크 모드에서 색상이 올바르게 변경되는가
+
+**Step 3: 테스트 완료 후 원래 페이지로 복원하지 않음**
+
+(Phase 2에서 실제 레이아웃을 구현할 때 교체 예정)
+
+**Step 4: Commit**
+
+```bash
+git add frontend/src/app/page.tsx
+git commit -m "test(frontend): add Phase 1 test page
+
+- Verify shadcn/ui components render correctly
+- Verify theme toggle works
+- Verify Lucide icons display
+- Temporary page for Phase 1 verification"
+```
+
+---
+
+## 완료 체크리스트
+
+- [ ] Task 1: shadcn/ui 초기화 및 설정
+- [ ] Task 2: next-themes 설치 및 ThemeProvider 설정
+- [ ] Task 3: Lucide Icons 설치
+- [ ] Task 4: 핵심 shadcn/ui 컴포넌트 설치
+- [ ] Task 5: 테마 토글 컴포넌트 생성
+- [ ] Task 6: 차트 라이브러리 설치
+- [ ] Task 7: 테스트 페이지로 검증
+
+## 다음 단계
+
+Phase 1 완료 후 Phase 2 (레이아웃 컴포넌트)로 진행:
+- 새로운 Sidebar (접힘, 테마 토글, 사용자 메뉴)
+- 새로운 Header (브레드크럼, 액션 버튼)
+- 모바일 반응형 Sheet 메뉴
diff --git a/docs/plans/2026-02-05-phase2-layout.md b/docs/plans/2026-02-05-phase2-layout.md
new file mode 100644
index 0000000..afcb4c1
--- /dev/null
+++ b/docs/plans/2026-02-05-phase2-layout.md
@@ -0,0 +1,450 @@
+# Phase 2: 레이아웃 컴포넌트 구현 계획
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** 접힘 가능한 사이드바, 새로운 헤더, 모바일 반응형 레이아웃을 구현한다.
+
+**Architecture:** App Router의 (dashboard) 라우트 그룹을 사용하여 인증된 페이지에 공통 레이아웃을 적용한다.
+
+**Tech Stack:** Next.js 16, React 19, shadcn/ui, Lucide Icons, next-themes
+
+---
+
+## Task 1: 사이드바 컴포넌트 생성
+
+**Files:**
+- Create: `frontend/src/components/layout/new-sidebar.tsx`
+
+**Code:**
+```typescript
+"use client";
+
+import * as React from "react";
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import {
+  LayoutDashboard,
+  Briefcase,
+  TrendingUp,
+  FlaskConical,
+  Database,
+  ChevronLeft,
+  ChevronRight,
+} from "lucide-react";
+import { cn } from "@/lib/utils";
+import { Button } from "@/components/ui/button";
+import { ThemeToggle } from "@/components/ui/theme-toggle";
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipProvider,
+  TooltipTrigger,
+} from "@/components/ui/tooltip";
+
+const navItems = [
+  { href: "/", label: "대시보드", icon: LayoutDashboard },
+  { href: "/portfolio", label: "포트폴리오", icon: Briefcase },
+  { href: "/strategy", label: "전략", icon: TrendingUp },
+  { href: "/backtest", label: "백테스트", icon: FlaskConical },
+  { href: "/admin/data", label: "데이터 관리", icon: Database },
+];
+
+interface SidebarProps {
+  collapsed: boolean;
+  onToggle: () => void;
+}
+
+export function Sidebar({ collapsed, onToggle }: SidebarProps) {
+  const pathname = usePathname();
+
+  return (
+    <TooltipProvider delayDuration={0}>
+      <aside
+        className={cn(
+          "flex h-screen flex-col border-r bg-card transition-all duration-300",
+          collapsed ? "w-16" : "w-64"
+        )}
+      >
+        {/* Logo */}
+        <div className="flex h-14 items-center border-b px-4">
+          {!collapsed && (
+            <span className="text-lg font-semibold">Galaxy-PO</span>
+          )}
+          {collapsed && <span className="text-lg font-semibold">G</span>}
+        </div>
+
+        {/* Navigation */}
+        <nav className="flex-1 space-y-1 p-2">
+          {navItems.map((item) => {
+            const isActive = pathname === item.href;
+            const Icon = item.icon;
+
+            const linkContent = (
+              <Link
+                href={item.href}
+                className={cn(
+                  "flex items-center gap-3 rounded-lg px-3 py-2 text-sm transition-colors",
+                  isActive
+                    ? "bg-primary text-primary-foreground"
+                    : "text-muted-foreground hover:bg-accent hover:text-accent-foreground"
+                )}
+              >
+                <Icon className="h-5 w-5 shrink-0" />
+                {!collapsed && <span>{item.label}</span>}
+              </Link>
+            );
+
+            if (collapsed) {
+              return (
+                <Tooltip key={item.href}>
+                  <TooltipTrigger asChild>{linkContent}</TooltipTrigger>
+                  <TooltipContent side="right">{item.label}</TooltipContent>
+                </Tooltip>
+              );
+            }
+
+            return <div key={item.href}>{linkContent}</div>;
+          })}
+        </nav>
+
+        {/* Footer */}
+        <div className="border-t p-2 space-y-2">
+          <div className={cn("flex", collapsed ? "justify-center" : "px-2")}>
+            <ThemeToggle />
+          </div>
+          <Button
+            variant="ghost"
+            size="sm"
+            onClick={onToggle}
+            className="w-full"
+          >
+            {collapsed ? (
+              <ChevronRight className="h-4 w-4" />
+            ) : (
+              <>
+                <ChevronLeft className="h-4 w-4 mr-2" />
+                접기
+              </>
+            )}
+          </Button>
+        </div>
+      </aside>
+    </TooltipProvider>
+  );
+}
+```
+
+**Commit:** `feat(frontend): add new Sidebar component with collapse support`
+
+---
+
+## Task 2: 헤더 컴포넌트 생성
+
+**Files:**
+- Create: `frontend/src/components/layout/new-header.tsx`
+
+**Code:**
+```typescript
+"use client";
+
+import * as React from "react";
+import { usePathname } from "next/navigation";
+import { Menu, LogOut } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { api } from "@/lib/api";
+import { useRouter } from "next/navigation";
+
+const pageTitles: Record<string, string> = {
+  "/": "대시보드",
+  "/portfolio": "포트폴리오",
+  "/portfolio/new": "새 포트폴리오",
+  "/strategy": "퀀트 전략",
+  "/strategy/multi-factor": "멀티팩터 전략",
+  "/strategy/quality": "슈퍼 퀄리티 전략",
+  "/strategy/value-momentum": "밸류-모멘텀 전략",
+  "/backtest": "백테스트",
+  "/admin/data": "데이터 관리",
+};
+
+interface HeaderProps {
+  onMenuClick?: () => void;
+  showMenuButton?: boolean;
+  username?: string;
+}
+
+export function Header({ onMenuClick, showMenuButton, username }: HeaderProps) {
+  const pathname = usePathname();
+  const router = useRouter();
+
+  const getPageTitle = () => {
+    if (pageTitles[pathname]) {
+      return pageTitles[pathname];
+    }
+    if (pathname.startsWith("/portfolio/") && pathname.includes("/rebalance")) {
+      return "리밸런싱";
+    }
+    if (pathname.startsWith("/portfolio/") && pathname.includes("/history")) {
+      return "히스토리";
+    }
+    if (pathname.startsWith("/portfolio/")) {
+      return "포트폴리오 상세";
+    }
+    if (pathname.startsWith("/backtest/")) {
+      return "백테스트 결과";
+    }
+    return "Galaxy-PO";
+  };
+
+  const handleLogout = () => {
+    api.logout();
+    router.push("/login");
+  };
+
+  return (
+    <header className="flex h-14 items-center justify-between border-b bg-card px-4">
+      <div className="flex items-center gap-4">
+        {showMenuButton && (
+          <Button variant="ghost" size="icon" onClick={onMenuClick}>
+            <Menu className="h-5 w-5" />
+          </Button>
+        )}
+        <h1 className="text-lg font-semibold">{getPageTitle()}</h1>
+      </div>
+
+      <div className="flex items-center gap-4">
+        {username && (
+          <span className="text-sm text-muted-foreground">{username}</span>
+        )}
+        <Button variant="ghost" size="icon" onClick={handleLogout}>
+          <LogOut className="h-5 w-5" />
+        </Button>
+      </div>
+    </header>
+  );
+}
+```
+
+**Commit:** `feat(frontend): add new Header component`
+
+---
+
+## Task 3: 대시보드 레이아웃 생성
+
+**Files:**
+- Create: `frontend/src/components/layout/dashboard-layout.tsx`
+
+**Code:**
+```typescript
+"use client";
+
+import * as React from "react";
+import { useState, useEffect } from "react";
+import { useRouter } from "next/navigation";
+import { Sidebar } from "@/components/layout/new-sidebar";
+import { Header } from "@/components/layout/new-header";
+import { Sheet, SheetContent } from "@/components/ui/sheet";
+import { api } from "@/lib/api";
+
+interface DashboardLayoutProps {
+  children: React.ReactNode;
+}
+
+export function DashboardLayout({ children }: DashboardLayoutProps) {
+  const [collapsed, setCollapsed] = useState(false);
+  const [mobileOpen, setMobileOpen] = useState(false);
+  const [username, setUsername] = useState<string | undefined>();
+  const [loading, setLoading] = useState(true);
+  const router = useRouter();
+
+  useEffect(() => {
+    const checkAuth = async () => {
+      try {
+        const user = await api.getCurrentUser();
+        setUsername(user.username);
+      } catch {
+        router.push("/login");
+      } finally {
+        setLoading(false);
+      }
+    };
+    checkAuth();
+  }, [router]);
+
+  if (loading) {
+    return (
+      <div className="flex h-screen items-center justify-center">
+        <div className="text-muted-foreground">로딩 중...</div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="flex h-screen bg-background">
+      {/* Desktop Sidebar */}
+      <div className="hidden md:block">
+        <Sidebar collapsed={collapsed} onToggle={() => setCollapsed(!collapsed)} />
+      </div>
+
+      {/* Mobile Sidebar */}
+      <Sheet open={mobileOpen} onOpenChange={setMobileOpen}>
+        <SheetContent side="left" className="w-64 p-0">
+          <Sidebar collapsed={false} onToggle={() => setMobileOpen(false)} />
+        </SheetContent>
+      </Sheet>
+
+      {/* Main Content */}
+      <div className="flex flex-1 flex-col overflow-hidden">
+        <Header
+          onMenuClick={() => setMobileOpen(true)}
+          showMenuButton={true}
+          username={username}
+        />
+        <main className="flex-1 overflow-auto p-6">{children}</main>
+      </div>
+    </div>
+  );
+}
+```
+
+**Commit:** `feat(frontend): add DashboardLayout with responsive sidebar`
+
+---
+
+## Task 4: 페이지에 레이아웃 적용
+
+**Files:**
+- Modify: `frontend/src/app/page.tsx`
+
+**Code:**
+```typescript
+"use client";
+
+import { DashboardLayout } from "@/components/layout/dashboard-layout";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Wallet, TrendingUp, Briefcase, RefreshCw } from "lucide-react";
+
+export default function DashboardPage() {
+  return (
+    <DashboardLayout>
+      <div className="space-y-6">
+        <h2 className="text-2xl font-bold">대시보드</h2>
+
+        {/* Summary Cards */}
+        <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
+          <Card>
+            <CardHeader className="flex flex-row items-center justify-between pb-2">
+              <CardTitle className="text-sm font-medium">총 자산</CardTitle>
+              <Wallet className="h-4 w-4 text-muted-foreground" />
+            </CardHeader>
+            <CardContent>
+              <div className="text-2xl font-bold">₩0</div>
+              <p className="text-xs text-muted-foreground">데이터 없음</p>
+            </CardContent>
+          </Card>
+
+          <Card>
+            <CardHeader className="flex flex-row items-center justify-between pb-2">
+              <CardTitle className="text-sm font-medium">총 수익률</CardTitle>
+              <TrendingUp className="h-4 w-4 text-muted-foreground" />
+            </CardHeader>
+            <CardContent>
+              <div className="text-2xl font-bold">0%</div>
+              <p className="text-xs text-muted-foreground">데이터 없음</p>
+            </CardContent>
+          </Card>
+
+          <Card>
+            <CardHeader className="flex flex-row items-center justify-between pb-2">
+              <CardTitle className="text-sm font-medium">포트폴리오</CardTitle>
+              <Briefcase className="h-4 w-4 text-muted-foreground" />
+            </CardHeader>
+            <CardContent>
+              <div className="text-2xl font-bold">0개</div>
+              <p className="text-xs text-muted-foreground">포트폴리오 없음</p>
+            </CardContent>
+          </Card>
+
+          <Card>
+            <CardHeader className="flex flex-row items-center justify-between pb-2">
+              <CardTitle className="text-sm font-medium">리밸런싱</CardTitle>
+              <RefreshCw className="h-4 w-4 text-muted-foreground" />
+            </CardHeader>
+            <CardContent>
+              <div className="text-2xl font-bold">0개</div>
+              <p className="text-xs text-muted-foreground">리밸런싱 필요 없음</p>
+            </CardContent>
+          </Card>
+        </div>
+
+        {/* Placeholder for charts */}
+        <div className="grid gap-4 md:grid-cols-2">
+          <Card className="col-span-1">
+            <CardHeader>
+              <CardTitle>자산 추이</CardTitle>
+            </CardHeader>
+            <CardContent className="h-[300px] flex items-center justify-center text-muted-foreground">
+              차트 영역 (Phase 3에서 구현)
+            </CardContent>
+          </Card>
+
+          <Card className="col-span-1">
+            <CardHeader>
+              <CardTitle>섹터 배분</CardTitle>
+            </CardHeader>
+            <CardContent className="h-[300px] flex items-center justify-center text-muted-foreground">
+              차트 영역 (Phase 3에서 구현)
+            </CardContent>
+          </Card>
+        </div>
+      </div>
+    </DashboardLayout>
+  );
+}
+```
+
+**Commit:** `feat(frontend): apply DashboardLayout to main page`
+
+---
+
+## Task 5: 포트폴리오 목록 페이지에 레이아웃 적용
+
+**Files:**
+- Modify: `frontend/src/app/portfolio/page.tsx`
+
+Read the existing file and wrap content with DashboardLayout, update styling to use shadcn/ui components.
+
+**Commit:** `feat(frontend): apply DashboardLayout to portfolio list page`
+
+---
+
+## Task 6: 나머지 페이지에 레이아웃 적용
+
+**Files to modify:**
+- `frontend/src/app/portfolio/new/page.tsx`
+- `frontend/src/app/portfolio/[id]/page.tsx`
+- `frontend/src/app/strategy/page.tsx`
+- `frontend/src/app/backtest/page.tsx`
+- `frontend/src/app/admin/data/page.tsx`
+
+For each page, wrap existing content with DashboardLayout.
+
+**Commit:** `feat(frontend): apply DashboardLayout to all pages`
+
+---
+
+## Task 7: 로그인 페이지 스타일 개선
+
+**Files:**
+- Modify: `frontend/src/app/login/page.tsx`
+
+Update to use shadcn/ui components (Card, Input, Button, Label).
+
+**Commit:** `feat(frontend): improve login page styling with shadcn/ui`
+
+---
+
+## Task 8: 빌드 및 검증
+
+Run build and verify all pages work correctly.
+
+**Commit:** Final cleanup if needed
diff --git a/frontend/src/app/layout.tsx b/frontend/src/app/layout.tsx
index e792ce2..0c499a7 100644
--- a/frontend/src/app/layout.tsx
+++ b/frontend/src/app/layout.tsx
@@ -7,7 +7,7 @@ import { Toaster } from '@/components/ui/sonner';
 const inter = Inter({ subsets: ['latin'] });
 
 export const metadata: Metadata = {
-  title: 'Galaxy-PO',
+  title: 'Galaxis-Po',
   description: 'Quant Portfolio Management Application',
 };
 
diff --git a/frontend/src/app/login/page.tsx b/frontend/src/app/login/page.tsx
index 4fc87d0..d5608b9 100644
--- a/frontend/src/app/login/page.tsx
+++ b/frontend/src/app/login/page.tsx
@@ -34,7 +34,7 @@ export default function LoginPage() {
     <div className="min-h-screen flex items-center justify-center bg-background px-4">
       <Card className="w-full max-w-md">
         <CardHeader className="text-center space-y-1">
-          <CardTitle className="text-2xl font-bold">Galaxy-PO</CardTitle>
+          <CardTitle className="text-2xl font-bold">Galaxis-Po</CardTitle>
           <CardDescription>포트폴리오 최적화 플랫폼에 오신 것을 환영합니다</CardDescription>
         </CardHeader>
         <CardContent>
diff --git a/frontend/src/components/layout/new-sidebar.tsx b/frontend/src/components/layout/new-sidebar.tsx
index a297f8e..e023011 100644
--- a/frontend/src/components/layout/new-sidebar.tsx
+++ b/frontend/src/components/layout/new-sidebar.tsx
@@ -60,7 +60,7 @@ export function NewSidebar({ collapsed = false, onCollapsedChange }: NewSidebarP
         )}>
           {!isCollapsed && (
             <div>
-              <h1 className="text-lg font-bold">Galaxy-PO</h1>
+              <h1 className="text-lg font-bold">Galaxis-Po</h1>
               <p className="text-xs text-muted-foreground">Quant Portfolio</p>
             </div>
           )}