히스토리 팝업 수정: ESC 닫기 + Arrow 키 네비게이션

- Arrow↑↓/Enter/Escape/1-9 키를 팝업 열릴 때 globalShortcut 등록, 닫힐 때 해제
- showHistoryPopup: 2-phase 제거 → 즉시 show (렌더러 비활성 문제 방지)
- hideHistoryPopup/itemSelected/popupDismissed에서 nav 키 해제

src/main/windows/WindowManager.ts

@@ -308,32 +308,30 @@ export function getHistoryPopupWindow(): BrowserWindow {
 export function showHistoryPopup(entries: Array<Record<string, unknown>>): void {
   const win = getHistoryPopupWindow()
 
-  win.webContents.send('history:showItems', { entries })
+  // 커서 위치에 즉시 배치+표시 (2-phase 제거 — 숨겨진 윈도우 렌더러 비활성 문제 방지)
+  const cursorPos = screen.getCursorScreenPoint()
+  const display = screen.getDisplayNearestPoint(cursorPos)
 
-  const handler = (_event: Electron.IpcMainEvent, data: { width: number; height: number }) => {
-    ipcMain.removeListener('history:popupMeasured', handler)
+  const popupWidth = 380
+  const popupHeight = Math.min(60 + entries.length * 44, 500)
 
-    const cursorPos = screen.getCursorScreenPoint()
-    const display = screen.getDisplayNearestPoint(cursorPos)
+  let x = cursorPos.x - Math.round(popupWidth / 2)
+  let y = cursorPos.y - popupHeight - 20
 
-    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', {})
+  x = Math.max(display.workArea.x, Math.min(x, display.workArea.x + display.workArea.width - popupWidth))
+  if (y < display.workArea.y) {
+    y = cursorPos.y + 20
   }
 
-  ipcMain.on('history:popupMeasured', handler)
+  win.setBounds({ x, y, width: popupWidth, height: popupHeight })
+
+  win.webContents.send('history:showItems', { entries })
+
+  if (!win.isVisible()) {
+    win.showInactive()
+  }
+
+  win.webContents.send('history:show', {})
 }
 
 export function hideHistoryPopup(): void {