Phase 3.5 구현: 커서 위치 히스토리 팝업 (D3RO 고유 기능)

- HistoryPopup: Vanilla JS, 다크 카드(#242427), 앰버 악센트(#f25b29)
- Ctrl+Shift+V → 커서 위치에 최근 10건 히스토리 팝업
- Arrow↑↓ 선택, Enter 붙여넣기, 1-9 직접 선택, ESC 닫기
- focusable: false → 활성 앱 포커스 유지
- 2-phase 리사이즈, 등장/퇴장 애니메이션
- WindowManager: HistoryPopup 관리 + 프리로딩
- Bootstrap: globalShortcut 등록 + IPC 연동

src/main/windows/WindowManager.ts

@@ -16,6 +16,7 @@ const logger = getLogger('WindowManager')
 let mainWindow: BrowserWindow | null = null
 let recordingTipWindow: BrowserWindow | null = null
 let resultPopupWindow: BrowserWindow | null = null
+let historyPopupWindow: BrowserWindow | null = null
 
 // ── 메인 윈도우 ───────────────────────────────────────
 
@@ -262,11 +263,106 @@ export function hideResultPopup(): void {
   }
 }
 
+// ── HistoryPopup 팝업 ─────────────────────────────────
+
+function createHistoryPopupWindow(): BrowserWindow {
+  const win = new BrowserWindow({
+    width: 360,
+    height: 400,
+    show: false,
+    frame: false,
+    transparent: true,
+    resizable: false,
+    alwaysOnTop: true,
+    skipTaskbar: true,
+    focusable: false,
+    webPreferences: {
+      preload: join(__dirname, '../preload/popup.js'),
+      sandbox: false,
+      contextIsolation: true,
+      nodeIntegration: false
+    }
+  })
+
+  if (is.dev && process.env['ELECTRON_RENDERER_URL']) {
+    win.loadURL(`${process.env['ELECTRON_RENDERER_URL']}/popups/history-popup/index.html`)
+  } else {
+    win.loadFile(join(__dirname, '../renderer/popups/history-popup/index.html'))
+  }
+
+  win.on('closed', () => {
+    historyPopupWindow = null
+  })
+
+  return win
+}
+
+export function getHistoryPopupWindow(): BrowserWindow {
+  if (!historyPopupWindow || historyPopupWindow.isDestroyed()) {
+    historyPopupWindow = createHistoryPopupWindow()
+    logger.info('HistoryPopup window created')
+  }
+  return historyPopupWindow
+}
+
+export function showHistoryPopup(entries: Array<Record<string, unknown>>): void {
+  const win = getHistoryPopupWindow()
+
+  win.webContents.send('history:showItems', { entries })
+
+  const handler = (_event: Electron.IpcMainEvent, data: { width: number; height: number }) => {
+    ipcMain.removeListener('history:popupMeasured', handler)
+
+    const cursorPos = screen.getCursorScreenPoint()
+    const display = screen.getDisplayNearestPoint(cursorPos)
+
+    let x = cursorPos.x - Math.round(data.width / 2)
+    let y = cursorPos.y - data.height - 20
+
+    x = Math.max(display.workArea.x, Math.min(x, display.workArea.x + display.workArea.width - data.width))
+    if (y < display.workArea.y) {
+      y = cursorPos.y + 20
+    }
+
+    win.setBounds({ x, y, width: data.width, height: data.height })
+
+    if (!win.isVisible()) {
+      win.showInactive()
+    }
+
+    win.webContents.send('history:show', {})
+  }
+
+  ipcMain.on('history:popupMeasured', handler)
+}
+
+export function hideHistoryPopup(): void {
+  if (historyPopupWindow && !historyPopupWindow.isDestroyed()) {
+    historyPopupWindow.webContents.send('history:hide', {})
+    setTimeout(() => {
+      if (historyPopupWindow && !historyPopupWindow.isDestroyed()) {
+        historyPopupWindow.hide()
+      }
+    }, 150)
+  }
+}
+
+export function sendKeyToHistoryPopup(key: string): void {
+  if (historyPopupWindow && !historyPopupWindow.isDestroyed() && historyPopupWindow.isVisible()) {
+    historyPopupWindow.webContents.send('history:keyEvent', { key })
+  }
+}
+
+export function isHistoryPopupVisible(): boolean {
+  return !!(historyPopupWindow && !historyPopupWindow.isDestroyed() && historyPopupWindow.isVisible())
+}
+
 // ── 프리로딩 ──────────────────────────────────────────
 
 export function preloadPopupWindows(): void {
   getRecordingTipWindow()
   getResultPopupWindow()
+  getHistoryPopupWindow()
   logger.info('Popup windows preloaded')
 }