fix: open detail popup on right monitor using Window Management API

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/dashboard/DashboardHeader.tsx

@@ -11,7 +11,7 @@ interface DashboardHeaderProps {
   stats: Stats;
   activeStatus: string;
   onStatusChange: (status: string) => void;
-  onOpenDetailWindow: () => void;
+  onOpenDetailWindow: () => void | Promise<void>;
   onOpenTaskManager: () => void;
 }
 

frontend/src/lib/dualMonitor.ts

@@ -14,6 +14,63 @@ type DualMonitorEvent =
 let channel: BroadcastChannel | null = null;
 let detailWindow: Window | null = null;
 
+interface ScreenDetailed {
+  left: number;
+  top: number;
+  width: number;
+  height: number;
+  availLeft?: number;
+  availTop?: number;
+  availWidth?: number;
+  availHeight?: number;
+}
+
+interface ScreenDetails {
+  currentScreen: ScreenDetailed;
+  screens: ScreenDetailed[];
+}
+
+interface WindowWithScreenDetails extends Window {
+  getScreenDetails?: () => Promise<ScreenDetails>;
+}
+
+/** 참조 대시보드와 동일: 우측 모니터 좌표·크기 계산 */
+async function getDetailWindowFeatures(): Promise<string> {
+  let left = window.screenX + window.outerWidth;
+  let top = window.screenY;
+  let width = window.screen.availWidth;
+  let height = window.screen.availHeight;
+
+  try {
+    const win = window as WindowWithScreenDetails;
+    if (win.getScreenDetails) {
+      const details = await win.getScreenDetails();
+      const current = details.currentScreen;
+      let target = details.screens.find((s) => s.left >= current.left + current.width);
+      target ||= details.screens.find((s) => s !== current);
+
+      if (target) {
+        left = target.availLeft ?? target.left;
+        top = target.availTop ?? target.top;
+        width = target.availWidth ?? target.width;
+        height = target.availHeight ?? target.height;
+      } else {
+        left = window.screenX + window.outerWidth;
+        width = window.screen.availWidth - left;
+        if (width < 800) {
+          width = 1920;
+          left = window.screen.availWidth;
+        }
+        height = window.screen.availHeight;
+      }
+    }
+  } catch (err) {
+    console.warn('Window Management API failed or denied, using fallback', err);
+  }
+
+  return `left=${left},top=${top},width=${width},height=${height},menubar=no,toolbar=no,location=no,status=no,resizable=yes,scrollbars=yes`;
+}
+
 function getChannel(): BroadcastChannel {
   if (!channel) {
     channel = new BroadcastChannel(CHANNEL_NAME);
@@ -27,33 +84,29 @@ export function isDetailWindowOpen(): boolean {
 }
 
 /** 상세 창 토글 — 열려 있으면 닫고, 닫혀 있으면 오른쪽 모니터에 열기 */
-export function openDetailWindow(): Window | null {
+export async function openDetailWindow(): Promise<Window | null> {
   if (isDetailWindowOpen()) {
     detailWindow!.close();
     detailWindow = null;
     return null;
   }
 
-  // 현재 창이 왼쪽 모니터에 있다고 가정하고
-  // 오른쪽 모니터의 시작 X 좌표 = 현재 창 X + 현재 화면 너비
-  const screenW = window.screen.width;
-  const screenH = window.screen.height;
-  const rightMonitorLeft = window.screenX + screenW;
-
   const detailUrl = `${window.location.origin}/detail`;
+  const features = await getDetailWindowFeatures();
 
-  detailWindow = window.open(
-    detailUrl,
-    DETAIL_WINDOW_NAME,
-    `width=${screenW},height=${screenH},left=${rightMonitorLeft},top=0,resizable=yes,scrollbars=yes`,
-  );
+  detailWindow = window.open(detailUrl, DETAIL_WINDOW_NAME, features);
+  try {
+    detailWindow?.focus();
+  } catch {
+    // popup-blocked 등
+  }
   return detailWindow;
 }
 
 /** 좌측 → 우측: 업무 선택 이벤트 전송 (창이 닫혀 있으면 열고 전송) */
-export function sendTaskSelected(taskId: string): void {
+export async function sendTaskSelected(taskId: string): Promise<void> {
   if (!isDetailWindowOpen()) {
-    openDetailWindow();
+    await openDetailWindow();
     // 창이 로드될 때까지 잠시 대기 후 전송
     setTimeout(() => {
       getChannel().postMessage({ type: 'TASK_SELECTED', taskId } satisfies DualMonitorEvent);