refactor: saasMode 분기 제거 — 항상 SaaS(OAuth only)로 동작

Mac/Windows 환경 불일치 해소. BUILD_TIME 상수, CONFIGURE 채널,
개발자 모드 UI 전부 제거. Supabase 설정은 supabase-config.ts SSOT.

apps/desktop/src/renderer/components/CloudSyncSection.tsx

@@ -3,7 +3,7 @@
 // 로그인 상태 / Sync Now 버튼 / 마지막 동기화 / 환경변수 설정
 
 import { useEffect, useState } from 'react'
-import { Box, Button, Stack, TextField, Alert, CircularProgress } from '@mui/material'
+import { Box, Button, Stack, Alert, CircularProgress } from '@mui/material'
 import CloudIcon from '@mui/icons-material/Cloud'
 import CloudDoneIcon from '@mui/icons-material/CloudDone'
 import GoogleIcon from '@mui/icons-material/Google'
@@ -16,7 +16,6 @@ interface CloudSyncState {
   userEmail: string | null
   lastSyncAt: number | null
   syncing: boolean
-  saasMode: boolean
 }
 
 interface SyncProgress {
@@ -31,11 +30,8 @@ export function CloudSyncSection(): React.ReactElement {
     authenticated: false,
     userEmail: null,
     lastSyncAt: null,
-    syncing: false,
-    saasMode: false
+    syncing: false
   })
-  const [supabaseUrl, setSupabaseUrl] = useState('')
-  const [anonKey, setAnonKey] = useState('')
   const [progress, setProgress] = useState<SyncProgress | null>(null)
   const [error, setError] = useState<string | null>(null)
   const [info, setInfo] = useState<string | null>(null)
@@ -46,13 +42,6 @@ export function CloudSyncSection(): React.ReactElement {
     void window.electronAPI.cloudSync.getState().then((r) => {
       if (r.success) setState(r.data)
     })
-    // 저장된 supabase 설정 로드
-    void window.electronAPI.config.get({ key: 'supabaseUrl' as never }).then((r) => {
-      if (r.success && typeof r.data === 'string') setSupabaseUrl(r.data)
-    })
-    void window.electronAPI.config.get({ key: 'supabaseAnonKey' as never }).then((r) => {
-      if (r.success && typeof r.data === 'string') setAnonKey(r.data)
-    })
 
     const unsubAuth = window.electronAPI.cloudSync.onAuthChanged((payload) => {
       setState((prev) => ({
@@ -84,21 +73,6 @@ export function CloudSyncSection(): React.ReactElement {
     }
   }, [])
 
-  async function handleConfigure(): Promise<void> {
-    setError(null)
-    setBusy(true)
-    try {
-      const r = await window.electronAPI.cloudSync.configure({ url: supabaseUrl, anonKey })
-      if (!r.success) {
-        setError(r.error.message)
-      } else {
-        setInfo('Supabase 연결 설정 저장됨')
-      }
-    } finally {
-      setBusy(false)
-    }
-  }
-
   async function handleSignIn(provider: 'google' | 'github'): Promise<void> {
     setError(null)
     setBusy(true)
@@ -161,8 +135,7 @@ export function CloudSyncSection(): React.ReactElement {
         <Box sx={{ ...typoSx('heading'), color: d3roPalette.text.primary }}>Cloud Sync</Box>
       </Stack>
 
-      {!state.authenticated && state.saasMode && (
-        // SaaS 빌드 타임 모드: URL/Key는 빌드에 박혀있으므로 OAuth 버튼만 노출.
+      {!state.authenticated && (
         <Stack spacing={2}>
           <Box sx={{ ...typoSx('label'), color: d3roPalette.text.label, mb: 1 }}>OAuth 로그인</Box>
           <Stack direction="row" spacing={1}>
@@ -186,57 +159,6 @@ export function CloudSyncSection(): React.ReactElement {
         </Stack>
       )}
 
-      {!state.authenticated && !state.saasMode && (
-        // Legacy 개발자 모드: 빌드 타임 env 미설정 → 사용자가 직접 입력 가능.
-        <Stack spacing={2}>
-          <Box sx={{ ...typoSx('label'), color: d3roPalette.text.label }}>
-            SUPABASE 설정 (개발자 모드)
-          </Box>
-          <TextField
-            label="Supabase URL"
-            size="small"
-            value={supabaseUrl}
-            onChange={(e) => setSupabaseUrl(e.target.value)}
-            placeholder="https://your-project.supabase.co"
-            fullWidth
-          />
-          <TextField
-            label="Anon Key"
-            size="small"
-            value={anonKey}
-            onChange={(e) => setAnonKey(e.target.value)}
-            placeholder="eyJ..."
-            type="password"
-            fullWidth
-          />
-          <Button variant="outlined" onClick={() => void handleConfigure()} disabled={busy}>
-            저장
-          </Button>
-
-          <Box sx={{ borderTop: `1px solid ${d3roPalette.border.subtle}`, pt: 2 }}>
-            <Box sx={{ ...typoSx('label'), color: d3roPalette.text.label, mb: 1 }}>OAuth 로그인</Box>
-            <Stack direction="row" spacing={1}>
-              <Button
-                variant="contained"
-                startIcon={<GoogleIcon />}
-                onClick={() => void handleSignIn('google')}
-                disabled={busy || !supabaseUrl || !anonKey}
-              >
-                Google
-              </Button>
-              <Button
-                variant="outlined"
-                startIcon={<GitHubIcon />}
-                onClick={() => void handleSignIn('github')}
-                disabled={busy || !supabaseUrl || !anonKey}
-              >
-                GitHub
-              </Button>
-            </Stack>
-          </Box>
-        </Stack>
-      )}
-
       {state.authenticated && (
         <Stack spacing={2}>
           <Box sx={{ color: d3roPalette.text.primary, fontSize: 13 }}>

apps/desktop/src/renderer/components/OnboardingModal.tsx

@@ -36,8 +36,6 @@ export function OnboardingModal({ open, onClose }: OnboardingModalProps): React.
   const [selectedDevice, setSelectedDevice] = useState('default')
   const [hotkeyBinding, setHotkeyBinding] = useState<HotkeyBinding | null>(null)
   const [hotkeyModalOpen, setHotkeyModalOpen] = useState(false)
-  const [saasMode, setSaasMode] = useState(false)
-
   useEffect(() => {
     if (!open) return
     setStep(0)
@@ -47,10 +45,6 @@ export function OnboardingModal({ open, onClose }: OnboardingModalProps): React.
     window.electronAPI.hotkey.getDictationShortcut().then((r) => {
       if (r.success && r.data) setHotkeyBinding(r.data)
     })
-    // Cloud Sync step은 빌드 타임 Supabase env가 있을 때만 의미가 있음
-    window.electronAPI.cloudSync.getState().then((r) => {
-      if (r.success) setSaasMode(r.data.saasMode)
-    })
   }, [open])
 
   const handleFinish = (): void => {
@@ -59,9 +53,9 @@ export function OnboardingModal({ open, onClose }: OnboardingModalProps): React.
     onClose()
   }
 
-  // Ollama step(3) 다음 — saasMode면 Cloud Sync step(4), 아니면 바로 완료(5)로
+  // Ollama step(3) 다음 → Cloud Sync step(4)로
   const nextAfterOllama = (): void => {
-    setStep(saasMode ? 4 : 5)
+    setStep(4)
   }
 
   // Cloud Sync step에서 Back 누르면 Ollama(3)로 복귀
@@ -256,7 +250,7 @@ export function OnboardingModal({ open, onClose }: OnboardingModalProps): React.
             </Box>
           )}
 
-          {/* Step 4: Cloud Sync (선택, saasMode에서만 노출) */}
+          {/* Step 4: Cloud Sync (선택) */}
           {step === 4 && (
             <Box>
               <Stack direction="row" alignItems="center" gap={1} mb={3}>