diff --git a/apps/admin/src/app/(admin)/layout.tsx b/apps/admin/src/app/(admin)/layout.tsx
index 2958c1d..efe53da 100644
--- a/apps/admin/src/app/(admin)/layout.tsx
+++ b/apps/admin/src/app/(admin)/layout.tsx
@@ -1,5 +1,5 @@
 // apps/admin/src/app/(admin)/layout.tsx
-// Admin 인증 가드 + Sidebar 레이아웃
+// Admin 레이아웃 — requireAdmin() 가드 + Sidebar
 
 import { Box } from '@mui/material'
 import { requireAdmin } from '@/lib/admin-guard'
diff --git a/apps/admin/src/app/auth/callback/route.ts b/apps/admin/src/app/auth/callback/route.ts
index 7573902..2b3935a 100644
--- a/apps/admin/src/app/auth/callback/route.ts
+++ b/apps/admin/src/app/auth/callback/route.ts
@@ -1,42 +1,46 @@
 // apps/admin/src/app/auth/callback/route.ts
-// OAuth 콜백 핸들러
+// OAuth 콜백 — code를 session으로 교환
 
 import { NextResponse, type NextRequest } from 'next/server'
 import { createServerClient, type CookieOptions } from '@supabase/ssr'
-import type { Database } from '@d3ro/api-client'
 
 export async function GET(request: NextRequest): Promise<NextResponse> {
   const { searchParams, origin } = new URL(request.url)
   const code = searchParams.get('code')
 
-  if (code) {
-    const supabase = createServerClient<Database>(
-      process.env.NEXT_PUBLIC_SUPABASE_URL ?? '',
-      process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY ?? '',
-      {
-        cookies: {
-          getAll() {
-            return request.cookies.getAll()
-          },
-          setAll(cookiesToSet: Array<{ name: string; value: string; options: CookieOptions }>) {
-            cookiesToSet.forEach(({ name, value, options }) => {
-              request.cookies.set({ name, value, ...options })
-            })
-          },
-        },
-      }
-    )
-
-    const { error } = await supabase.auth.exchangeCodeForSession(code)
-    if (!error) {
-      const response = NextResponse.redirect(`${origin}/`)
-      // 세션 쿠키를 응답에 복사
-      request.cookies.getAll().forEach((cookie) => {
-        response.cookies.set(cookie.name, cookie.value)
-      })
-      return response
-    }
+  if (!code) {
+    return NextResponse.redirect(`${origin}/login?error=no_code`)
   }
 
-  return NextResponse.redirect(`${origin}/login`)
+  // 쿠키를 수집할 배열
+  const cookiesToSet: Array<{ name: string; value: string; options: CookieOptions }> = []
+
+  const supabase = createServerClient(
+    process.env.NEXT_PUBLIC_SUPABASE_URL ?? '',
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY ?? '',
+    {
+      cookies: {
+        getAll() {
+          return request.cookies.getAll()
+        },
+        setAll(cookies) {
+          cookiesToSet.push(...cookies)
+        },
+      },
+    }
+  )
+
+  const { error } = await supabase.auth.exchangeCodeForSession(code)
+
+  if (error) {
+    return NextResponse.redirect(`${origin}/login?error=${encodeURIComponent(error.message)}`)
+  }
+
+  // 세션 교환 성공 후 response 생성 + 수집된 쿠키 적용
+  const response = NextResponse.redirect(`${origin}/`)
+  for (const { name, value, options } of cookiesToSet) {
+    response.cookies.set({ name, value, ...options })
+  }
+
+  return response
 }
diff --git a/apps/admin/src/lib/admin-guard.ts b/apps/admin/src/lib/admin-guard.ts
index c813b98..bc88d9d 100644
--- a/apps/admin/src/lib/admin-guard.ts
+++ b/apps/admin/src/lib/admin-guard.ts
@@ -1,5 +1,5 @@
 // apps/admin/src/lib/admin-guard.ts
-// RSC용 admin 가드 — profile.role='admin' 체크
+// RSC용 admin 가드 — app_metadata.role='admin' 체크
 
 import { redirect } from 'next/navigation'
 import { getSupabaseServerClient } from './supabase-server'
@@ -18,32 +18,22 @@ export async function requireAdmin(): Promise<AdminUser> {
     redirect('/login')
   }
 
-  // role은 DB 타입에 미정의이므로 raw 캐스팅
-  const { data: profile } = await supabase
-    .from('profiles')
-    .select('id, name')
-    .eq('id', user.id)
-    .maybeSingle()
-
-  if (!profile) {
-    redirect('/login')
-  }
-
-  // role 별도 조회 (DB 타입에 role 컬럼 미정의)
-  const { data: roleData } = await supabase
-    .from('profiles')
-    .select('role' as 'id')
-    .eq('id', user.id)
-    .maybeSingle()
-
-  const role = (roleData as unknown as { role: string } | null)?.role
+  // app_metadata.role 체크 (JWT에 포함, RLS 재귀 없음)
+  const role = (user.app_metadata as Record<string, unknown>)?.role as string | undefined
   if (role !== 'admin') {
     redirect('/unauthorized')
   }
 
+  // profile 이름 조회 (자기 자신은 기존 RLS로 접근 가능)
+  const { data: profile } = await supabase
+    .from('profiles')
+    .select('name')
+    .eq('id', user.id)
+    .maybeSingle()
+
   return {
     id: user.id,
     email: user.email ?? null,
-    name: (profile as { name: string | null }).name,
+    name: (profile as { name: string | null } | null)?.name ?? null,
   }
 }
diff --git a/apps/admin/src/middleware.ts b/apps/admin/src/middleware.ts
new file mode 100644
index 0000000..14524da
--- /dev/null
+++ b/apps/admin/src/middleware.ts
@@ -0,0 +1,37 @@
+// apps/admin/src/middleware.ts
+// Supabase 세션 갱신 미들웨어 — 모든 요청에서 쿠키 기반 세션을 갱신
+
+import { NextResponse, type NextRequest } from 'next/server'
+import { createServerClient, type CookieOptions } from '@supabase/ssr'
+
+export async function middleware(request: NextRequest): Promise<NextResponse> {
+  const response = NextResponse.next({ request: { headers: request.headers } })
+
+  const url = process.env.NEXT_PUBLIC_SUPABASE_URL
+  const key = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY
+
+  if (!url || !key) return response
+
+  const supabase = createServerClient(url, key, {
+    cookies: {
+      getAll() {
+        return request.cookies.getAll()
+      },
+      setAll(cookiesToSet: Array<{ name: string; value: string; options: CookieOptions }>) {
+        cookiesToSet.forEach(({ name, value, options }) => {
+          request.cookies.set({ name, value, ...options })
+          response.cookies.set({ name, value, ...options })
+        })
+      },
+    },
+  })
+
+  // 세션 갱신 (토큰 리프레시)
+  await supabase.auth.getUser()
+
+  return response
+}
+
+export const config = {
+  matcher: ['/((?!_next/static|_next/image|favicon.ico).*)'],
+}
diff --git a/package-lock.json b/package-lock.json
index aec576f..9da05c5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,7 @@
       "workspaces": [
         "apps/desktop",
         "apps/web",
+        "apps/admin",
         "packages/*"
       ],
       "devDependencies": {
@@ -22,6 +23,31 @@
         "typescript": "^5.7.0"
       }
     },
+    "apps/admin": {
+      "name": "@d3ro/admin",
+      "version": "1.0.0",
+      "dependencies": {
+        "@d3ro/api-client": "*",
+        "@d3ro/core": "*",
+        "@d3ro/ui": "*",
+        "@emotion/cache": "^11.14.0",
+        "@emotion/react": "^11.14.0",
+        "@emotion/styled": "^11.14.0",
+        "@mui/icons-material": "^7.0.0",
+        "@mui/material": "^7.0.0",
+        "@mui/material-nextjs": "^7.0.0",
+        "@supabase/ssr": "^0.10.0",
+        "@supabase/supabase-js": "^2.103.0",
+        "next": "^15.0.0",
+        "react": "^19.0.0",
+        "react-dom": "^19.0.0"
+      },
+      "devDependencies": {
+        "@types/node": "^22.13.0",
+        "@types/react": "^19.0.0",
+        "@types/react-dom": "^19.0.0"
+      }
+    },
     "apps/desktop": {
       "name": "@d3ro/desktop",
       "version": "1.0.0",
@@ -48,7 +74,6 @@
         "electron-log": "^5.2.0",
         "electron-store": "^10.0.0",
         "fluent-ffmpeg": "^2.1.3",
-        "nanoid": "^5.1.7",
         "node-record-lpcm16": "^1.0.1",
         "pdf-parse": "^2.4.5",
         "react": "^19.0.0",
@@ -688,6 +713,10 @@
       "integrity": "sha512-lB59uJoaGIfOOL9knQqQRfhl9g7x8/wqFkp13zTdkRu1huG9kg6IJs1O8hqj9rs6h7orGxHJUKb+mX3rPbWGhA==",
       "license": "Apache-2.0"
     },
+    "node_modules/@d3ro/admin": {
+      "resolved": "apps/admin",
+      "link": true
+    },
     "node_modules/@d3ro/api-client": {
       "resolved": "packages/api-client",
       "link": true
diff --git a/server/supabase/config.toml b/server/supabase/config.toml
index a14f627..be6a5c1 100644
--- a/server/supabase/config.toml
+++ b/server/supabase/config.toml
@@ -42,6 +42,8 @@ enabled = true
 site_url = "http://localhost:5173"
 additional_redirect_urls = [
   "http://localhost:5173",
+  "http://localhost:3000",
+  "http://localhost:3001",
   "https://d3ro.dev",
   "d3ro-voice://auth-callback"
 ]
diff --git a/server/supabase/migrations/20260413000003_fix_admin_rls.sql b/server/supabase/migrations/20260413000003_fix_admin_rls.sql
new file mode 100644
index 0000000..251e000
--- /dev/null
+++ b/server/supabase/migrations/20260413000003_fix_admin_rls.sql
@@ -0,0 +1,27 @@
+-- 재귀 RLS 정책 제거 + app_metadata 기반으로 교체
+-- profiles 테이블에서 자기 자신을 서브쿼리하면 무한 재귀 발생
+
+-- 1. 기존 재귀 정책 삭제
+DROP POLICY IF EXISTS "admin_read_all_profiles" ON public.profiles;
+DROP POLICY IF EXISTS "admin_read_all_subscriptions" ON public.subscriptions;
+DROP POLICY IF EXISTS "admin_read_all_daily_usage" ON public.daily_usage;
+
+-- 2. auth.users.raw_app_meta_data 기반 admin 정책 (재귀 없음)
+-- 관리자 설정: UPDATE auth.users SET raw_app_meta_data = raw_app_meta_data || '{"role":"admin"}' WHERE id = '...'
+CREATE POLICY "admin_read_all_profiles" ON public.profiles
+  FOR SELECT TO authenticated
+  USING (
+    (auth.jwt() -> 'app_metadata' ->> 'role') = 'admin'
+  );
+
+CREATE POLICY "admin_read_all_subscriptions" ON public.subscriptions
+  FOR SELECT TO authenticated
+  USING (
+    (auth.jwt() -> 'app_metadata' ->> 'role') = 'admin'
+  );
+
+CREATE POLICY "admin_read_all_daily_usage" ON public.daily_usage
+  FOR SELECT TO authenticated
+  USING (
+    (auth.jwt() -> 'app_metadata' ->> 'role') = 'admin'
+  );