Ollama 설치 안내 UI + 온보딩 Ollama 단계

- StatusBar: 오프라인 3초 후 넛징 버블 표시 ("설치 안내 보기→" 링크)
- OllamaGuideModal: 3단계 설치 안내 (다운로드→모델 pull→자동 연결)
- OnboardingModal: Step 3에 Ollama 설치 안내 단계 추가
- Settings 정보 탭: "초기 설정 안내 다시 보기" 버튼
- system.openExternal IPC 추가 (외부 URL 열기)

src/renderer/components/OnboardingModal.tsx

@@ -14,6 +14,7 @@ import {
 import MicIcon from '@mui/icons-material/Mic'
 import KeyboardIcon from '@mui/icons-material/Keyboard'
 import CheckCircleIcon from '@mui/icons-material/CheckCircle'
+import OpenInNewIcon from '@mui/icons-material/OpenInNew'
 import { d3roPalette, d3roFontMono } from '../theme'
 import { Led } from './ds'
 import { HotkeyRecordModal } from './HotkeyRecordModal'
@@ -25,7 +26,7 @@ interface OnboardingModalProps {
 }
 
 export function OnboardingModal({ open, onClose }: OnboardingModalProps): React.ReactElement {
-  const [step, setStep] = useState(0) // 0: 환영, 1: 마이크, 2: 핫키, 3: 완료
+  const [step, setStep] = useState(0) // 0: 환영, 1: 마이크, 2: 핫키, 3: Ollama, 4: 완료
   const [devices, setDevices] = useState<AudioDevice[]>([])
   const [selectedDevice, setSelectedDevice] = useState('default')
   const [hotkeyBinding, setHotkeyBinding] = useState<HotkeyBinding | null>(null)
@@ -199,8 +200,45 @@ export function OnboardingModal({ open, onClose }: OnboardingModalProps): React.
             </Box>
           )}
 
-          {/* Step 3: 완료 */}
+          {/* Step 3: Ollama 설치 */}
           {step === 3 && (
+            <Box>
+              <Stack direction="row" alignItems="center" gap={1} mb={3}>
+                <Led color="amber" size={12} />
+                <Typography sx={{ fontFamily: d3roFontMono, fontWeight: 700, fontSize: '14px' }}>
+                  Ollama 설치 (선택)
+                </Typography>
+              </Stack>
+              <Typography variant="body2" sx={{ color: d3roPalette.text.secondary, mb: 2 }}>
+                번역, 요약 등 LLM 후처리를 사용하려면 Ollama가 필요합니다.
+                음성 받아쓰기 자체는 Ollama 없이도 동작합니다.
+              </Typography>
+              <Button
+                variant="outlined"
+                endIcon={<OpenInNewIcon sx={{ fontSize: 14 }} />}
+                onClick={() => window.electronAPI.system.openExternal({ url: 'https://ollama.com/download' })}
+                fullWidth
+                sx={{ mb: 1.5, fontFamily: d3roFontMono }}
+              >
+                Ollama 다운로드
+              </Button>
+              <Box sx={{ p: 1.5, borderRadius: '8px', bgcolor: d3roPalette.bg.inset, boxShadow: 'inset 0 1px 4px rgba(0,0,0,0.3)', mb: 3 }}>
+                <Typography sx={{ fontFamily: d3roFontMono, fontSize: '11px', color: d3roPalette.accent.amber }}>
+                  $ ollama pull qwen3:4b
+                </Typography>
+                <Typography sx={{ fontSize: '10px', color: d3roPalette.text.inactive, mt: 0.5 }}>
+                  설치 후 터미널에서 모델을 다운로드하세요
+                </Typography>
+              </Box>
+              <Stack direction="row" justifyContent="space-between">
+                <Button onClick={() => setStep(2)} sx={{ color: d3roPalette.text.inactive }}>뒤로</Button>
+                <Button variant="contained" onClick={() => setStep(4)}>다음</Button>
+              </Stack>
+            </Box>
+          )}
+
+          {/* Step 4: 완료 */}
+          {step === 4 && (
             <Box sx={{ textAlign: 'center', py: 3 }}>
               <CheckCircleIcon sx={{ fontSize: 48, color: d3roPalette.tag.green, mb: 2 }} />
               <Typography sx={{ fontFamily: d3roFontMono, fontSize: '18px', fontWeight: 700, mb: 1 }}>