feat(admin): 관리자 대시보드 + 회원 상세 화면

- 대시보드(/admin/dashboard, 기본 랜딩): 요약 카드(총회원·금일 신규/탈퇴·DAU/WAU/MAU),
  접속자 추이(일/주/월 토글), 티어별 회원수, 시군구 지역 분포 — 모두 체크인 기반
- 회원 상세(/admin/members/:id): 프로필 + 강아지/체크인/매칭/구독 이력, 목록에서 상세 버튼
- adminStats API 모듈, 좌측 메뉴에 대시보드 추가

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/api/adminMembers.ts

@@ -5,10 +5,49 @@ export type MemberStatus = 'ACTIVE' | 'DORMANT' | 'BANNED'
 export type MemberTier = 'FREE' | 'AD_FREE' | 'PREMIUM'
 export type MemberRole = 'USER' | 'ADMIN'
 
+export interface DogDetail {
+  id: number
+  name: string
+  breed: string | null
+  size: string | null
+  gender: string | null
+  neutered: boolean
+  birthDate: string | null
+  imageUrl: string | null
+}
+export interface CheckInDetail {
+  spotName: string
+  region: string | null
+  checkedInAt: string
+}
+export interface MatchDetail {
+  id: number
+  direction: string
+  counterpartDog: string
+  status: string
+  createdAt: string
+}
+export interface SubscriptionDetail {
+  tier: string
+  platform: string
+  startedAt: string
+  expiresAt: string
+  active: boolean
+}
+export interface MemberDetail {
+  member: Member
+  dogs: DogDetail[]
+  checkIns: CheckInDetail[]
+  matches: MatchDetail[]
+  subscriptions: SubscriptionDetail[]
+}
+
 /** 관리자 회원관리 API — /api/admin/members (ADMIN 전용) */
 export const adminMembersApi = {
   list: () => http.get<Member[]>('/api/admin/members'),
 
+  detail: (id: number) => http.get<MemberDetail>(`/api/admin/members/${id}`),
+
   updateStatus: (id: number, status: MemberStatus) =>
     http.put<Member>(`/api/admin/members/${id}/status`, { status }),
 

src/api/adminStats.ts

@@ -0,0 +1,32 @@
+import { http } from './http'
+
+export interface Count {
+  key: string
+  count: number
+}
+
+export interface StatsSummary {
+  members: { total: number; byTier: Count[]; byStatus: Count[] }
+  today: { signups: number; withdrawals: number }
+  visitors: { dau: number; wau: number; mau: number }
+}
+
+export interface VisitorPoint {
+  label: string
+  count: number
+}
+
+export interface RegionStat {
+  region: string
+  checkIns: number
+  users: number
+}
+
+export type VisitorUnit = 'day' | 'week' | 'month'
+
+/** 관리자 대시보드 통계 API (체크인 기반) */
+export const adminStatsApi = {
+  summary: () => http.get<StatsSummary>('/api/admin/stats/summary'),
+  visitors: (unit: VisitorUnit) => http.get<VisitorPoint[]>(`/api/admin/stats/visitors?unit=${unit}`),
+  regions: () => http.get<RegionStat[]>('/api/admin/stats/regions'),
+}