diff --git a/frontend/src/components/strategyEditor/FlowNodes.tsx b/frontend/src/components/strategyEditor/FlowNodes.tsx
index cd3712f..dd731f0 100644
--- a/frontend/src/components/strategyEditor/FlowNodes.tsx
+++ b/frontend/src/components/strategyEditor/FlowNodes.tsx
@@ -129,6 +129,12 @@ function MultiSideHandles({
 function usePaletteDropHandlers(id: string, d: StrategyFlowNodeData) {
   const { screenToFlowPosition } = useReactFlow();
 
+  const onDragEnter = useCallback((e: React.DragEvent) => {
+    if (!isPaletteHtmlDrag(e)) return;
+    e.preventDefault();
+    e.stopPropagation();
+  }, []);
+
   const onDragOver = useCallback((e: React.DragEvent) => {
     if (!isPaletteHtmlDrag(e)) return;
     e.preventDefault();
@@ -154,13 +160,13 @@ function usePaletteDropHandlers(id: string, d: StrategyFlowNodeData) {
     d.onDropTarget?.(id, payload, flowPos);
   }, [d, id, screenToFlowPosition]);
 
-  return { onDragOver, onDragLeave, onDrop };
+  return { onDragEnter, onDragOver, onDragLeave, onDrop };
 }
 
 export const StartNode = memo(function StartNode({ id, data }: NodeProps) {
   const d = data as StrategyFlowNodeData;
   const isSell = d.signalTab === 'sell';
-  const { onDragOver, onDragLeave, onDrop } = usePaletteDropHandlers(id, d);
+  const { onDragEnter, onDragOver, onDragLeave, onDrop } = usePaletteDropHandlers(id, d);
   const candleTypes = d.candleTypes?.length
     ? d.candleTypes
     : getStartCandleTypes({ candleType: d.candleType ?? '1m' });
@@ -171,6 +177,7 @@ export const StartNode = memo(function StartNode({ id, data }: NodeProps) {
   return (
     <div
       className={`se-flow-node se-flow-node--start${isSell ? ' se-flow-node--sell-mode' : ''} ${d.dragOver ? 'se-flow-node--drop' : ''}`}
+      onDragEnter={onDragEnter}
       onDragOver={onDragOver}
       onDragLeave={onDragLeave}
       onDrop={onDrop}
@@ -221,13 +228,14 @@ export const LogicGateNode = memo(function LogicGateNode({ id, data, selected }:
   const isPriceExtremePair = isPriceExtremeBreakoutPairRoot(node);
   const isInflection33Pair = isInflection33PairRoot(node);
   const isStableStrategyPair = isStableStrategyPairRoot(node);
-  const { onDragOver, onDragLeave, onDrop } = usePaletteDropHandlers(id, d);
+  const { onDragEnter, onDragOver, onDragLeave, onDrop } = usePaletteDropHandlers(id, d);
   const [settingsOpen, setSettingsOpen] = useState(false);
 
   return (
     <div
       className={`se-flow-node se-flow-node--logic${isStochPair ? ' se-flow-node--stoch-pair' : ''}${isPriceExtremePair ? ' se-flow-node--price-extreme-pair' : ''}${isInflection33Pair ? ' se-flow-node--inflection33-pair' : ''}${isStableStrategyPair ? ' se-flow-node--stable-strategy-pair' : ''}${isSell ? ' se-flow-node--sell-mode' : ''}${d.isOrphan ? ' se-flow-node--orphan' : ''} ${selected ? 'se-flow-node--selected' : ''} ${d.dragOver ? ' se-flow-node--drop' : ''}${settingsOpen ? ' se-flow-node--settings-open' : ''}`}
       style={{ '--se-gate-color': color } as React.CSSProperties}
+      onDragEnter={onDragEnter}
       onDragOver={onDragOver}
       onDragLeave={onDragLeave}
       onDrop={onDrop}
@@ -398,7 +406,7 @@ export const ConditionFlowNode = memo(function ConditionFlowNode({ id, data, sel
   const isCross = ['CROSS_UP', 'CROSS_DOWN'].includes(condType);
   const tone = isCross ? 'cross' : 'value';
   const isSell = d.signalTab === 'sell';
-  const { onDragOver, onDragLeave, onDrop } = usePaletteDropHandlers(id, d);
+  const { onDragEnter, onDragOver, onDragLeave, onDrop } = usePaletteDropHandlers(id, d);
   const [settingsOpen, setSettingsOpen] = useState(false);
   const showSettings = cond && hasNodeSettings(cond);
 
@@ -409,6 +417,7 @@ export const ConditionFlowNode = memo(function ConditionFlowNode({ id, data, sel
   return (
     <div
       className={`se-flow-node se-flow-node--cond se-flow-node--${tone}${isSell ? ' se-flow-node--sell-mode' : ''}${d.isOrphan ? ' se-flow-node--orphan' : ''} ${selected ? 'se-flow-node--selected' : ''} ${d.dragOver ? 'se-flow-node--drop' : ''}${settingsOpen ? ' se-flow-node--settings-open' : ''}`}
+      onDragEnter={onDragEnter}
       onDragOver={onDragOver}
       onDragLeave={onDragLeave}
       onDrop={onDrop}
diff --git a/frontend/src/components/strategyEditor/PaletteChip.tsx b/frontend/src/components/strategyEditor/PaletteChip.tsx
index ede77aa..fc3deb7 100644
--- a/frontend/src/components/strategyEditor/PaletteChip.tsx
+++ b/frontend/src/components/strategyEditor/PaletteChip.tsx
@@ -3,6 +3,7 @@ import {
   handlePaletteMouseDown,
   handlePalettePointerDown,
   handlePaletteTouchStart,
+  markPaletteHtmlDragEnd,
   needsPointerPaletteDrag,
   shouldSuppressPaletteClick,
   writePaletteHtmlDragData,
@@ -53,6 +54,10 @@ export default function PaletteChip({
     writePaletteHtmlDragData(e, buildPayload());
   };
 
+  const onDragEnd = () => {
+    markPaletteHtmlDragEnd();
+  };
+
   const onPointerDown = (e: React.PointerEvent) => {
     handlePalettePointerDown(e, buildPayload(), composite ? `${label} + ${label}` : label);
   };
@@ -92,6 +97,7 @@ export default function PaletteChip({
       draggable={!needsPointerPaletteDrag()}
       className={`se-palette-card ${color ? `se-palette-card--${color}` : 'se-palette-card--ind'}${composite ? ' se-palette-card--composite' : ''}${selected ? ' se-palette-card--selected' : ''}`}
       onDragStart={onDragStart}
+      onDragEnd={onDragEnd}
       onPointerDown={onPointerDown}
       onMouseDown={onMouseDown}
       onTouchStart={onTouchStart}
diff --git a/frontend/src/components/strategyEditor/SidewaysFilterPaletteTab.tsx b/frontend/src/components/strategyEditor/SidewaysFilterPaletteTab.tsx
index 979cf9d..3a51b9f 100644
--- a/frontend/src/components/strategyEditor/SidewaysFilterPaletteTab.tsx
+++ b/frontend/src/components/strategyEditor/SidewaysFilterPaletteTab.tsx
@@ -4,6 +4,7 @@ import type { DefType } from '../../utils/strategyEditorShared';
 import {
   handlePalettePointerDown,
   handlePaletteTouchStart,
+  markPaletteHtmlDragEnd,
   needsPointerPaletteDrag,
   writePaletteHtmlDragData,
   type PaletteDragPayload,
@@ -85,6 +86,11 @@ function SidewaysFilterChip({
     writePaletteHtmlDragData(e, payload as PaletteDragPayload);
   };
 
+  const onDragEnd = () => {
+    hideHint();
+    markPaletteHtmlDragEnd();
+  };
+
   const onPointerDown = (e: React.PointerEvent) => {
     hideHint();
     const payload: PaletteDragPayload = {
@@ -123,6 +129,7 @@ function SidewaysFilterChip({
       draggable={!needsPointerPaletteDrag()}
       className={`se-palette-card se-palette-card--range se-palette-card--range-${item.mode}${selected ? ' se-palette-card--selected' : ''}`}
       onDragStart={onDragStart}
+      onDragEnd={onDragEnd}
       onPointerDown={onPointerDown}
       onTouchStart={onTouchStart}
       onClick={handleClick}
diff --git a/frontend/src/components/strategyEditor/StrategyEditorCanvas.tsx b/frontend/src/components/strategyEditor/StrategyEditorCanvas.tsx
index d60721c..e6d156e 100644
--- a/frontend/src/components/strategyEditor/StrategyEditorCanvas.tsx
+++ b/frontend/src/components/strategyEditor/StrategyEditorCanvas.tsx
@@ -32,6 +32,8 @@ import {
 import { buildSidewaysFilterNode } from '../../utils/sidewaysFilterPaletteStorage';
 import {
   isPaletteHtmlDrag,
+  isPaletteHtmlDragActive,
+  markPaletteHtmlDragEnd,
   needsPointerPaletteDrag,
   readPaletteHtmlDragData,
   setPaletteDragDropHandler,
@@ -1282,6 +1284,40 @@ function StrategyEditorCanvasInner({
   const lastPreviewAnchorRef = useRef<string | null>(null);
   const lastPreviewKeyRef = useRef<string | null>(null);
 
+  useEffect(() => {
+    if (needsPointerPaletteDrag()) return;
+    const onDocDragOver = (e: DragEvent) => {
+      if (!isPaletteHtmlDragActive()) return;
+      e.preventDefault();
+      const { flowPos, anchorId } = resolveDropFromClientRef.current(e.clientX, e.clientY);
+      if (anchorId) {
+        const sideKey = `${anchorId}:${Math.round(flowPos.x / 8)}:${Math.round(flowPos.y / 8)}`;
+        if (sideKey === lastPreviewKeyRef.current) return;
+        lastPreviewKeyRef.current = sideKey;
+        lastPreviewAnchorRef.current = anchorId;
+        updatePreviewRef.current(anchorId, flowPos);
+        return;
+      }
+      if (lastPreviewAnchorRef.current != null) {
+        lastPreviewAnchorRef.current = null;
+        lastPreviewKeyRef.current = null;
+        clearPreviewRef.current();
+      }
+    };
+    const onDocDragEnd = () => {
+      lastPreviewAnchorRef.current = null;
+      lastPreviewKeyRef.current = null;
+      clearPreviewRef.current();
+      markPaletteHtmlDragEnd();
+    };
+    document.addEventListener('dragover', onDocDragOver, { passive: false });
+    document.addEventListener('dragend', onDocDragEnd);
+    return () => {
+      document.removeEventListener('dragover', onDocDragOver);
+      document.removeEventListener('dragend', onDocDragEnd);
+    };
+  }, []);
+
   useEffect(() => {
     if (!needsPointerPaletteDrag()) return;
     return subscribePaletteDrag((ev: PaletteDragEvent) => {
@@ -1320,6 +1356,11 @@ function StrategyEditorCanvasInner({
     });
   }, []);
 
+  const onPaneDragEnter = useCallback((e: React.DragEvent) => {
+    if (!isPaletteDrag(e)) return;
+    e.preventDefault();
+  }, [isPaletteDrag]);
+
   const onPaneDragOver = useCallback((e: React.DragEvent) => {
     e.preventDefault();
     if (!isPaletteDrag(e)) return;
@@ -1378,6 +1419,7 @@ function StrategyEditorCanvasInner({
         isValidConnection={isValidConnection}
         onReconnect={onReconnect}
         onDrop={onPaneDrop}
+        onDragEnter={onPaneDragEnter}
         onDragOver={onPaneDragOver}
         onDragLeave={onPaneDragLeave}
         connectionMode={ConnectionMode.Loose}
diff --git a/frontend/src/utils/paletteDragSession.ts b/frontend/src/utils/paletteDragSession.ts
index f18690e..7ffb51d 100644
--- a/frontend/src/utils/paletteDragSession.ts
+++ b/frontend/src/utils/paletteDragSession.ts
@@ -54,6 +54,26 @@ let moveRafId: number | null = null;
 let pendingMove: { x: number; y: number } | null = null;
 let unbindGesture: (() => void) | null = null;
 let lastDragClientXY: { x: number; y: number } | null = null;
+let htmlPaletteDragActive = false;
+
+function installHtmlPaletteDragGlobals() {
+  if (typeof window === 'undefined') return;
+  const w = window as Window & { __gcPaletteHtmlDragGlobals?: boolean };
+  if (w.__gcPaletteHtmlDragGlobals) return;
+  w.__gcPaletteHtmlDragGlobals = true;
+
+  window.addEventListener('dragover', (e) => {
+    if (!htmlPaletteDragActive) return;
+    e.preventDefault();
+    if (e.dataTransfer) e.dataTransfer.dropEffect = 'copy';
+  }, { passive: false });
+
+  window.addEventListener('dragend', () => {
+    htmlPaletteDragActive = false;
+  });
+}
+
+installHtmlPaletteDragGlobals();
 
 function hasCoarsePointer(): boolean {
   if (typeof window === 'undefined') return false;
@@ -306,7 +326,20 @@ export function handlePaletteTouchStart(
   startPaletteDragGesture(touch.clientX, touch.clientY, touch.identifier, payload);
 }
 
+export function markPaletteHtmlDragStart(): void {
+  htmlPaletteDragActive = true;
+}
+
+export function markPaletteHtmlDragEnd(): void {
+  htmlPaletteDragActive = false;
+}
+
+export function isPaletteHtmlDragActive(): boolean {
+  return htmlPaletteDragActive;
+}
+
 export function writePaletteHtmlDragData(e: React.DragEvent, payload: PaletteDragPayload): void {
+  markPaletteHtmlDragStart();
   const json = JSON.stringify(payload);
   e.dataTransfer.setData('application/json', json);
   e.dataTransfer.setData('text/plain', json);
@@ -314,13 +347,16 @@ export function writePaletteHtmlDragData(e: React.DragEvent, payload: PaletteDra
 }
 
 export function isPaletteHtmlDrag(e: React.DragEvent): boolean {
-  return e.dataTransfer.types.includes('application/json')
-    || e.dataTransfer.types.includes('text/plain');
+  if (htmlPaletteDragActive) return true;
+  const types = e.dataTransfer?.types;
+  if (!types) return false;
+  return Array.from(types).includes('application/json')
+    || Array.from(types).includes('text/plain');
 }
 
 export function readPaletteHtmlDragData(e: React.DragEvent): PaletteDragPayload | null {
-  const raw = e.dataTransfer.getData('application/json')
-    || e.dataTransfer.getData('text/plain');
+  const raw = e.dataTransfer.getData('text/plain')
+    || e.dataTransfer.getData('application/json');
   if (!raw) return null;
   try {
     return JSON.parse(raw) as PaletteDragPayload;