feat(mobile): Phase M-1 모바일 프로젝트 기반 + V3 마스터 플랜

- V3 모바일 마스터 플랜 작성 (docs/v3/00-mobile-master-plan.md)
  11개 Phase, 5주 로드맵, 전략 결정사항 확정
- 7개 디자인 HTML 레퍼런스 저장 (docs/v3/designs/)
- app.json → app.config.ts 전환 + 환경변수 체계
- 5탭 네비게이션 (DASH/HIST/REC FAB/TALK/SET)
- metro.config.js monorepo 격리 (root RN 0.84 충돌 해결)
- ui-native 테마 디자인 목업 색상 동기화
- SafeArea 적용 (useSafeAreaInsets)
- DEV 로그인 우회 (__DEV__ 전용)
- Supabase .env 연동
- iOS 시뮬레이터 검증 완료

apps/mobile/lib/auth-context.tsx

@@ -10,14 +10,26 @@ interface AuthContextValue {
   session: Session | null
   user: User | null
   loading: boolean
+  devBypass: () => void
 }
 
 const AuthContext = createContext<AuthContextValue>({
   session: null,
   user: null,
-  loading: true
+  loading: true,
+  devBypass: () => {}
 })
 
+// DEV 전용 — 가짜 유저로 로그인 우회
+const DEV_USER: User = {
+  id: 'dev-user-00000',
+  email: 'dev@d3ro.local',
+  app_metadata: {},
+  user_metadata: {},
+  aud: 'authenticated',
+  created_at: new Date().toISOString()
+} as User
+
 export function AuthProvider({ children }: { children: ReactNode }): React.ReactElement {
   const [session, setSession] = useState<Session | null>(null)
   const [loading, setLoading] = useState(true)
@@ -47,8 +59,16 @@ export function AuthProvider({ children }: { children: ReactNode }): React.React
     }
   }, [])
 
+  const [devMode, setDevMode] = useState(false)
+
+  function devBypass(): void {
+    setDevMode(true)
+  }
+
+  const effectiveUser = devMode ? DEV_USER : (session?.user ?? null)
+
   return (
-    <AuthContext.Provider value={{ session, user: session?.user ?? null, loading }}>
+    <AuthContext.Provider value={{ session, user: effectiveUser, loading, devBypass }}>
       {children}
     </AuthContext.Provider>
   )

apps/mobile/lib/supabase.ts

@@ -3,29 +3,33 @@
 
 import 'react-native-url-polyfill/auto'
 import AsyncStorage from '@react-native-async-storage/async-storage'
-import { createClient } from '@supabase/supabase-js'
+import { createClient, type SupabaseClient } from '@supabase/supabase-js'
 import Constants from 'expo-constants'
 
 const supabaseUrl = (Constants.expoConfig?.extra?.supabaseUrl as string | undefined) ?? ''
 const supabaseAnonKey = (Constants.expoConfig?.extra?.supabaseAnonKey as string | undefined) ?? ''
 
-if (!supabaseUrl || !supabaseAnonKey) {
-  // env 미설정 — placeholder로 client 생성, 런타임에 isConfigured 체크
+export function isSupabaseConfigured(): boolean {
+  return Boolean(supabaseUrl && supabaseAnonKey)
 }
 
-export const supabase = createClient(
-  supabaseUrl || 'https://placeholder.supabase.co',
-  supabaseAnonKey || 'placeholder-anon-key',
-  {
+function createSupabaseClient(): SupabaseClient {
+  if (!isSupabaseConfigured()) {
+    // env 미설정 시에도 크래시 방지용 더미 클라이언트 생성
+    // 런타임에서 isSupabaseConfigured()로 체크 후 사용
+    return createClient('https://localhost.invalid', 'no-key', {
+      auth: { storage: AsyncStorage, persistSession: false, detectSessionInUrl: false }
+    })
+  }
+
+  return createClient(supabaseUrl, supabaseAnonKey, {
     auth: {
       storage: AsyncStorage,
       autoRefreshToken: true,
       persistSession: true,
       detectSessionInUrl: false
     }
-  }
-)
-
-export function isSupabaseConfigured(): boolean {
-  return Boolean(supabaseUrl && supabaseAnonKey)
+  })
 }
+
+export const supabase = createSupabaseClient()