Phase 3 구현: 텍스트 삽입 + RecordingTip/ResultPopup + Settings

- TextInsertService: clipboard save→set→Ctrl+V→restore (@nut-tree-fork/nut-js)
- RecordingTip 팝업: 9개 웨이브바 cos분포, thinking 점근수렴, 2-phase 리사이즈
- ResultPopup 팝업: 복사 버튼, auto-close, 마우스 호버 유지, 다크모드
- WindowManager: 팝업 프리로딩, 커서 위치 표시, 멀티모니터 보정
- Settings 모달: General/Audio/STT/LLM 탭
- VoiceModeService: 전사 완료 시 자동 텍스트 삽입 + 팝업 연동
- electron-vite: 팝업 HTML 멀티 엔트리 + popup preload 빌드

src/renderer/components/AppLayout.tsx

@@ -17,6 +17,7 @@ import HistoryIcon from '@mui/icons-material/History'
 import MenuBookIcon from '@mui/icons-material/MenuBook'
 import SettingsIcon from '@mui/icons-material/Settings'
 import { DashboardPage } from '../pages/DashboardPage'
+import { SettingsModal } from './SettingsModal'
 
 type Route = 'dashboard' | 'history' | 'dictionary'
 
@@ -30,6 +31,7 @@ const NAV_ITEMS: Array<{ route: Route; label: string; icon: React.ReactElement }
 
 export function AppLayout(): React.ReactElement {
   const [currentRoute, setCurrentRoute] = useState<Route>('dashboard')
+  const [settingsOpen, setSettingsOpen] = useState(false)
 
   return (
     <Box sx={{ display: 'flex', height: '100vh' }}>
@@ -74,7 +76,7 @@ export function AppLayout(): React.ReactElement {
 
         {/* Bottom */}
         <List>
-          <ListItemButton sx={{ my: 0.5 }}>
+          <ListItemButton sx={{ my: 0.5 }} onClick={() => setSettingsOpen(true)}>
             <ListItemIcon sx={{ minWidth: 40 }}>
               <SettingsIcon />
             </ListItemIcon>
@@ -105,6 +107,8 @@ export function AppLayout(): React.ReactElement {
           </Typography>
         )}
       </Box>
+
+      <SettingsModal open={settingsOpen} onClose={() => setSettingsOpen(false)} />
     </Box>
   )
 }