수정

frontend/src/components/StrategyEditorPage.tsx

@@ -141,6 +141,7 @@ import {
   strategyDtoToListExportItem,
 } from '../utils/strategyImportExport';
 import PaletteChip from './strategyEditor/PaletteChip';
+import PaletteDragOverlay from './strategyEditor/PaletteDragOverlay';
 import SePanelCollapseHandle from './strategyEditor/SePanelCollapseHandle';
 import {
   clampPanelSize,
@@ -1616,6 +1617,7 @@ export default function StrategyEditorPage({ theme, onNavigateToBacktest }: Prop
 
   return (
     <div className={`se-page se-page--${theme}`}>
+      <PaletteDragOverlay />
       {saveToast && (
         <div className="se-save-toast">전략이 DB에 성공적으로 저장되었습니다.</div>
       )}

frontend/src/components/strategyEditor/PaletteDragOverlay.tsx

@@ -0,0 +1,89 @@
+import React, { useCallback, useEffect, useLayoutEffect, useRef, useState } from 'react';
+import { createPortal } from 'react-dom';
+import {
+  bindPaletteDragOverlayElement,
+  notifyPaletteDragCancel,
+  notifyPaletteDragEnd,
+  notifyPaletteDragMove,
+  registerPaletteDragOverlay,
+  type PaletteDragOverlaySession,
+} from '../../utils/paletteDragSession';
+
+/**
+ * Tauri WebView — 드래그 중 전체 화면 overlay 가 pointer 이벤트·drop 을 수신
+ */
+export default function PaletteDragOverlay() {
+  const [session, setSession] = useState<PaletteDragOverlaySession | null>(null);
+  const [cursor, setCursor] = useState({ x: 0, y: 0 });
+  const overlayRef = useRef<HTMLDivElement | null>(null);
+
+  useEffect(() => {
+    registerPaletteDragOverlay({
+      mount: next => {
+        setCursor({ x: next.x, y: next.y });
+        setSession(next);
+      },
+      unmount: () => setSession(null),
+      bindElement: el => {
+        overlayRef.current = el as HTMLDivElement | null;
+      },
+    });
+    return () => registerPaletteDragOverlay(null);
+  }, []);
+
+  useLayoutEffect(() => {
+    bindPaletteDragOverlayElement(overlayRef.current);
+    return () => bindPaletteDragOverlayElement(null);
+  }, [session]);
+
+  useLayoutEffect(() => {
+    if (!session || !overlayRef.current) return;
+    try {
+      overlayRef.current.setPointerCapture(session.pointerId);
+    } catch {
+      /* body capture fallback */
+    }
+  }, [session]);
+
+  const onPointerMove = useCallback((e: React.PointerEvent) => {
+    if (!session || e.pointerId !== session.pointerId) return;
+    e.preventDefault();
+    e.stopPropagation();
+    setCursor({ x: e.clientX, y: e.clientY });
+    notifyPaletteDragMove(e.clientX, e.clientY);
+  }, [session]);
+
+  const onPointerUp = useCallback((e: React.PointerEvent) => {
+    if (!session || e.pointerId !== session.pointerId) return;
+    e.preventDefault();
+    e.stopPropagation();
+    notifyPaletteDragEnd(e.clientX, e.clientY);
+  }, [session]);
+
+  const onPointerCancel = useCallback((e: React.PointerEvent) => {
+    if (!session || e.pointerId !== session.pointerId) return;
+    e.preventDefault();
+    e.stopPropagation();
+    notifyPaletteDragCancel(e.clientX, e.clientY);
+  }, [session]);
+
+  if (!session) return null;
+
+  return createPortal(
+    <div
+      ref={overlayRef}
+      className="se-palette-drag-overlay"
+      onPointerMove={onPointerMove}
+      onPointerUp={onPointerUp}
+      onPointerCancel={onPointerCancel}
+    >
+      <div
+        className="se-palette-drag-overlay-label"
+        style={{ left: cursor.x, top: cursor.y }}
+      >
+        {session.payload.label}
+      </div>
+    </div>,
+    document.body,
+  );
+}

frontend/src/components/strategyEditor/StrategyEditorCanvas.tsx

@@ -1233,9 +1233,9 @@ function StrategyEditorCanvasInner({
     clientX: number,
     clientY: number,
   ) => {
-    if (!isOverStrategyBuilder(clientX, clientY)) return;
-
     const { flowPos, anchorId } = resolveDropFromClient(clientX, clientY);
+    const overCanvas = isOverStrategyBuilder(clientX, clientY);
+    if (!overCanvas && !anchorId) return;
     if (data.type === 'start') {
       addStartAt(flowPos);
       return;

frontend/src/styles/strategyEditor.css

@@ -2027,6 +2027,12 @@
   background: var(--se-palette-card-bg);
   transition: transform 0.12s, box-shadow 0.12s, border-color 0.12s, background 0.12s;
 }
+.desktop-client .se-palette-card {
+  cursor: grab;
+}
+.desktop-client .se-palette-card:active {
+  cursor: grabbing;
+}
 .se-palette-card:hover {
   transform: translateY(-2px);
 }
@@ -2039,6 +2045,34 @@ body.se-palette-drag-active {
   user-select: none;
 }
 
+.se-palette-drag-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 20040;
+  touch-action: none;
+  cursor: grabbing;
+  background: transparent;
+}
+
+.se-palette-drag-overlay-label {
+  position: fixed;
+  z-index: 20041;
+  pointer-events: none;
+  transform: translate(-50%, -100%);
+  padding: 6px 12px;
+  border-radius: 8px;
+  font-size: 0.72rem;
+  font-weight: 700;
+  color: var(--se-text, #e2e8f0);
+  background: color-mix(in srgb, var(--se-accent, #4dabf7) 22%, var(--se-panel-card-bg, #1e293b));
+  border: 1px solid color-mix(in srgb, var(--se-accent, #4dabf7) 55%, transparent);
+  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
+  white-space: nowrap;
+  max-width: min(240px, 90vw);
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
 .se-palette-drag-ghost {
   position: fixed;
   z-index: 20050;

frontend/src/utils/flowScreenProjection.ts

@@ -2,6 +2,8 @@ import type { ReactFlowInstance } from '@xyflow/react';
 
 type FlowProjector = Pick<ReactFlowInstance, 'screenToFlowPosition' | 'getViewport'>;
 
+const DRAG_LAYER_SELECTOR = '.se-palette-drag-overlay, .se-palette-drag-ghost';
+
 function manualProject(
   clientX: number,
   clientY: number,
@@ -20,6 +22,27 @@ function manualProject(
   };
 }
 
+/** 드래그 overlay 아래 DOM 탐색 (overlay pointer-events 잠시 비활성) */
+export function elementsUnderDragPoint(clientX: number, clientY: number): Element[] {
+  const overlays = document.querySelectorAll<HTMLElement>(DRAG_LAYER_SELECTOR);
+  const prev: string[] = [];
+  overlays.forEach(el => {
+    prev.push(el.style.pointerEvents);
+    el.style.pointerEvents = 'none';
+  });
+  try {
+    if (typeof document.elementsFromPoint === 'function') {
+      return document.elementsFromPoint(clientX, clientY);
+    }
+    const hit = document.elementFromPoint(clientX, clientY);
+    return hit ? [hit] : [];
+  } finally {
+    overlays.forEach((el, i) => {
+      el.style.pointerEvents = prev[i] ?? '';
+    });
+  }
+}
+
 /** screen(client) → React Flow 좌표 (Tauri WebView screenToFlowPosition 보정) */
 export function projectScreenToFlowPosition(
   clientX: number,
@@ -31,7 +54,6 @@ export function projectScreenToFlowPosition(
     try {
       const pos = rf.screenToFlowPosition({ x: clientX, y: clientY });
       if (Number.isFinite(pos.x) && Number.isFinite(pos.y)) {
-        // WebView 버그: 화면 픽셀을 그대로 반환하는 경우
         const looksLikeScreenPx =
           Math.abs(pos.x - clientX) < 2 && Math.abs(pos.y - clientY) < 2;
         if (!looksLikeScreenPx) return pos;
@@ -50,26 +72,18 @@ export function projectScreenToFlowPosition(
   );
 }
 
-/** 팔레트 드롭 — 전략 빌더 캔버스 위인지 (우측 팔레트 위 release 무시) */
+/** 팔레트 드롭 — 전략 빌더 캔버스 위인지 */
 export function isOverStrategyBuilder(clientX: number, clientY: number): boolean {
-  const elements = typeof document.elementsFromPoint === 'function'
-    ? document.elementsFromPoint(clientX, clientY)
-    : [document.elementFromPoint(clientX, clientY)].filter(Boolean) as Element[];
-
-  for (const el of elements) {
-    if (el.closest('.se-palette-panel, .se-side-wrap--right, .se-palette-drag-ghost')) continue;
-    if (el.closest('.se-canvas-wrap')) return true;
+  for (const el of elementsUnderDragPoint(clientX, clientY)) {
+    if (el.closest('.se-palette-panel, .se-side-wrap--right')) continue;
+    if (el.closest('.se-canvas-wrap, .react-flow__pane, .react-flow__renderer')) return true;
   }
   return false;
 }
 
-/** DOM hit-test — elementsFromPoint 로 ghost·overlay 아래 노드까지 탐색 */
+/** DOM hit-test — overlay 아래 react-flow 노드 탐색 */
 export function findFlowNodeIdAtClientPoint(clientX: number, clientY: number): string | null {
-  const elements = typeof document.elementsFromPoint === 'function'
-    ? document.elementsFromPoint(clientX, clientY)
-    : [document.elementFromPoint(clientX, clientY)].filter(Boolean) as Element[];
-
-  for (const el of elements) {
+  for (const el of elementsUnderDragPoint(clientX, clientY)) {
     const nodeEl = el.closest('.react-flow__node') as HTMLElement | null;
     if (nodeEl) {
       const id = nodeEl.getAttribute('data-id');
@@ -109,10 +123,12 @@ export function resolvePaletteDropClientPoint(
     return { flowPos, anchorId: domId };
   }
 
-  // DOM hit-test 실패 시 START 노드 bounding rect 로 보조
   for (const node of nodes) {
     if (!isConnectTarget(node.id)) continue;
-    const el = document.querySelector(`.react-flow__node[data-id="${CSS.escape(node.id)}"]`);
+    const escaped = typeof CSS !== 'undefined' && CSS.escape
+      ? CSS.escape(node.id)
+      : node.id.replace(/"/g, '\\"');
+    const el = document.querySelector(`.react-flow__node[data-id="${escaped}"]`);
     if (!el) continue;
     const rect = el.getBoundingClientRect();
     if (

frontend/src/utils/paletteDragSession.ts

@@ -1,7 +1,6 @@
 /**
- * Tauri WebView — HTML5 DnD 대신 pointer capture 기반 팔레트 드래그
+ * Desktop(Tauri) — HTML5 DnD 대신 pointer + 전체화면 overlay 드래그
  */
-import { clientXYFromNative } from './pointerDrag';
 import { isDesktop } from './platform';
 
 export type PaletteDragPayload = Record<string, unknown> & {
@@ -19,16 +18,29 @@ export interface PaletteDragEvent {
   payload: PaletteDragPayload;
 }
 
+export interface PaletteDragOverlaySession {
+  payload: PaletteDragPayload;
+  pointerId: number;
+  x: number;
+  y: number;
+}
+
 type PaletteDragListener = (event: PaletteDragEvent) => void;
 type PaletteDropHandler = (event: PaletteDragEvent) => void;
 
+type OverlayController = {
+  mount: (session: PaletteDragOverlaySession) => void;
+  unmount: () => void;
+  bindElement: (el: HTMLElement | null) => void;
+};
+
 let suppressClickUntil = 0;
 const DRAG_THRESHOLD_PX = 6;
 
 let activePayload: PaletteDragPayload | null = null;
 let activePointerId: number | null = null;
-let unbindMove: (() => void) | null = null;
-let pendingPointerId: number | null = null;
+let overlayController: OverlayController | null = null;
+let overlayElement: HTMLElement | null = null;
 let listeners = new Set<PaletteDragListener>();
 let dropHandler: PaletteDropHandler | null = null;
 
@@ -41,11 +53,14 @@ export function subscribePaletteDrag(listener: PaletteDragListener): () => void
   return () => listeners.delete(listener);
 }
 
-/** Canvas 가 mount 직후 drop 콜백 등록 (subscribe 누락 방지) */
 export function setPaletteDragDropHandler(handler: PaletteDropHandler | null): void {
   dropHandler = handler;
 }
 
+export function registerPaletteDragOverlay(controller: OverlayController | null): void {
+  overlayController = controller;
+}
+
 export function getActivePaletteDrag(): PaletteDragPayload | null {
   return activePayload;
 }
@@ -71,12 +86,10 @@ function dispatchEnd(xy: { x: number; y: number }, payload: PaletteDragPayload)
 }
 
 function cleanupDrag() {
-  unbindMove?.();
-  unbindMove = null;
   activePayload = null;
   activePointerId = null;
-  pendingPointerId = null;
   document.body.classList.remove('se-palette-drag-active');
+  overlayController?.unmount();
   document.querySelectorAll('.se-palette-drag-ghost').forEach(el => el.remove());
 }
 
@@ -92,13 +105,40 @@ function finishDrag(phase: 'end' | 'cancel', xy: { x: number; y: number }) {
   }
 }
 
-/** 캔버스 pointerup 백업 — WebView 에서 window 이벤트 누락 시 */
+export function notifyPaletteDragMove(clientX: number, clientY: number) {
+  if (!activePayload) return;
+  emit({ phase: 'move', x: clientX, y: clientY, payload: activePayload });
+}
+
+export function notifyPaletteDragEnd(clientX: number, clientY: number) {
+  finishDrag('end', { x: clientX, y: clientY });
+}
+
+export function notifyPaletteDragCancel(clientX: number, clientY: number) {
+  finishDrag('cancel', { x: clientX, y: clientY });
+}
+
 export function completePaletteDragAt(clientX: number, clientY: number): boolean {
   if (!activePayload) return false;
   finishDrag('end', { x: clientX, y: clientY });
   return true;
 }
 
+function captureOnOverlay(pointerId: number) {
+  try {
+    overlayElement?.setPointerCapture(pointerId);
+  } catch {
+    /* ignore */
+  }
+  try {
+    if (!overlayElement?.hasPointerCapture(pointerId)) {
+      document.body.setPointerCapture(pointerId);
+    }
+  } catch {
+    /* ignore */
+  }
+}
+
 function beginDrag(
   payload: PaletteDragPayload,
   xy: { x: number; y: number },
@@ -108,48 +148,18 @@ function beginDrag(
   activePointerId = pointerId;
   document.body.classList.add('se-palette-drag-active');
 
-  try {
-    document.body.setPointerCapture(pointerId);
-  } catch {
-    /* ignore */
-  }
+  overlayController?.mount({ payload, pointerId, x: xy.x, y: xy.y });
+  requestAnimationFrame(() => captureOnOverlay(pointerId));
 
   emit({ phase: 'start', x: xy.x, y: xy.y, payload });
-
-  const onMove = (ev: Event) => {
-    if (!(ev instanceof PointerEvent) || ev.pointerId !== pointerId || !activePayload) return;
-    if (ev.cancelable) ev.preventDefault();
-    emit({ phase: 'move', x: ev.clientX, y: ev.clientY, payload: activePayload });
-  };
-
-  const onUp = (ev: Event) => {
-    if (!(ev instanceof PointerEvent) || ev.pointerId !== pointerId) return;
-    const xy = clientXYFromNative(ev) ?? { x: ev.clientX, y: ev.clientY };
-    finishDrag('end', xy);
-  };
-
-  window.addEventListener('pointermove', onMove, { passive: false });
-  window.addEventListener('pointerup', onUp, true);
-  window.addEventListener('pointercancel', onUp, true);
-  window.addEventListener('mouseup', onUp, true);
-  document.addEventListener('pointerup', onUp, true);
-  document.addEventListener('lostpointercapture', onUp, true);
-
-  unbindMove = () => {
-    window.removeEventListener('pointermove', onMove);
-    window.removeEventListener('pointerup', onUp, true);
-    window.removeEventListener('pointercancel', onUp, true);
-    window.removeEventListener('mouseup', onUp, true);
-    document.removeEventListener('pointerup', onUp, true);
-    document.removeEventListener('lostpointercapture', onUp, true);
-    try {
-      if (document.body.hasPointerCapture(pointerId)) {
-        document.body.releasePointerCapture(pointerId);
 }
-    } catch {
-      /* ignore */
+
+export function bindPaletteDragOverlayElement(el: HTMLElement | null) {
+  overlayElement = el;
+  overlayController?.bindElement(el);
+  if (el && activePointerId != null) {
+    captureOnOverlay(activePointerId);
   }
-  };
 }
 
 export function handlePalettePointerDown(
@@ -161,10 +171,11 @@ export function handlePalettePointerDown(
   if (e.button !== 0) return;
   if ((e.target as HTMLElement).closest('input, textarea, select, button')) return;
 
+  e.preventDefault();
+
   const startX = e.clientX;
   const startY = e.clientY;
   const pointerId = e.pointerId;
-  pendingPointerId = pointerId;
 
   const onPointerMove = (ev: PointerEvent) => {
     if (ev.pointerId !== pointerId) return;
@@ -185,12 +196,11 @@ export function handlePalettePointerDown(
     window.removeEventListener('pointermove', onPointerMove);
     window.removeEventListener('pointerup', onPointerUp);
     window.removeEventListener('pointercancel', onPointerCancel);
-    pendingPointerId = null;
   };
 
   const onPointerCancel = onPointerUp;
 
-  window.addEventListener('pointermove', onPointerMove);
+  window.addEventListener('pointermove', onPointerMove, { passive: false });
   window.addEventListener('pointerup', onPointerUp);
   window.addEventListener('pointercancel', onPointerCancel);
 }