가상매매 그리드 배치 오류수정

frontend/src/components/common/GridLayoutPicker.tsx

@@ -1,7 +1,8 @@
 /**
  * 그리드형 n×n 레이아웃 선택 (TradingView 스타일 팝업) — 알림 목록·가상매매 공용
  */
-import React, { useEffect, useRef, useState } from 'react';
+import React, { useCallback, useEffect, useRef, useState } from 'react';
+import { createPortal } from 'react-dom';
 import {
   gridPresetsByGroup,
   getTradeNotificationGridPreset,
@@ -134,6 +135,8 @@ const LayoutIcon: React.FC<{ preset: TradeNotificationGridPreset }> = ({ preset
   );
 };
 
+const POPOVER_WIDTH = 320;
+
 const GridLayoutPicker: React.FC<Props> = ({
   value,
   onChange,
@@ -142,14 +145,46 @@ const GridLayoutPicker: React.FC<Props> = ({
   popoverAlign = 'right',
 }) => {
   const [open, setOpen] = useState(false);
+  const [popoverPos, setPopoverPos] = useState<{ top: number; left: number } | null>(null);
   const rootRef = useRef<HTMLDivElement>(null);
+  const popoverRef = useRef<HTMLDivElement>(null);
   const active = getTradeNotificationGridPreset(value);
   const groups = [...gridPresetsByGroup().entries()].sort((a, b) => a[0] - b[0]);
 
+  const updatePopoverPos = useCallback(() => {
+    const el = rootRef.current;
+    if (!el) return;
+    const rect = el.getBoundingClientRect();
+    const width = Math.min(POPOVER_WIDTH, window.innerWidth - 48);
+    const left = popoverAlign === 'left'
+      ? rect.left
+      : rect.right - width;
+    setPopoverPos({
+      top: rect.bottom + 8,
+      left: Math.max(8, Math.min(left, window.innerWidth - width - 8)),
+    });
+  }, [popoverAlign]);
+
+  useEffect(() => {
+    if (!open) {
+      setPopoverPos(null);
+      return;
+    }
+    updatePopoverPos();
+    window.addEventListener('resize', updatePopoverPos);
+    window.addEventListener('scroll', updatePopoverPos, true);
+    return () => {
+      window.removeEventListener('resize', updatePopoverPos);
+      window.removeEventListener('scroll', updatePopoverPos, true);
+    };
+  }, [open, updatePopoverPos]);
+
   useEffect(() => {
     if (!open) return;
     const onDoc = (e: MouseEvent) => {
-      if (!rootRef.current?.contains(e.target as Node)) setOpen(false);
+      const t = e.target as Node;
+      if (rootRef.current?.contains(t) || popoverRef.current?.contains(t)) return;
+      setOpen(false);
     };
     const onKey = (e: KeyboardEvent) => {
       if (e.key === 'Escape') setOpen(false);
@@ -164,9 +199,55 @@ const GridLayoutPicker: React.FC<Props> = ({
 
   const popoverClass = [
     cls(variant, 'popover'),
+    cls(variant, 'popover--portal'),
     popoverAlign === 'left' ? cls(variant, 'popover--align-left') : '',
   ].filter(Boolean).join(' ');
 
+  const popover = open && popoverPos ? (
+    <div
+      ref={popoverRef}
+      className={popoverClass}
+      role="dialog"
+      aria-label="그리드 배치"
+      style={{
+        position: 'fixed',
+        top: popoverPos.top,
+        left: popoverPos.left,
+        right: 'auto',
+        zIndex: 10000,
+        width: Math.min(POPOVER_WIDTH, window.innerWidth - 48),
+      }}
+    >
+      <p className={cls(variant, 'popover-title')}>그리드 배치</p>
+      {groups.map(([group, presets]) => (
+        <div key={group} className={cls(variant, 'group')}>
+          <span className={cls(variant, 'group-lbl')}>{group}</span>
+          <div className={cls(variant, 'group-row')}>
+            {presets.map(preset => (
+              <button
+                key={preset.id}
+                type="button"
+                className={[
+                  `${variant}-grid-preset-btn`,
+                  value === preset.id ? `${variant}-grid-preset-btn--on` : '',
+                ].filter(Boolean).join(' ')}
+                title={`${preset.label} (${preset.cols}열)`}
+                aria-label={`${preset.label} 배치`}
+                aria-pressed={value === preset.id}
+                onClick={() => {
+                  onChange(preset.id);
+                  setOpen(false);
+                }}
+              >
+                <LayoutIcon preset={preset} />
+              </button>
+            ))}
+          </div>
+        </div>
+      ))}
+    </div>
+  ) : null;
+
   return (
     <div className={cls(variant, 'picker')} ref={rootRef}>
       <button
@@ -186,37 +267,7 @@ const GridLayoutPicker: React.FC<Props> = ({
         <LayoutIcon preset={active} />
       </button>
 
-      {open && (
+      {popover && createPortal(popover, document.body)}
-        <div className={popoverClass} role="dialog" aria-label="그리드 배치">
-          <p className={cls(variant, 'popover-title')}>그리드 배치</p>
-          {groups.map(([group, presets]) => (
-            <div key={group} className={cls(variant, 'group')}>
-              <span className={cls(variant, 'group-lbl')}>{group}</span>
-              <div className={cls(variant, 'group-row')}>
-                {presets.map(preset => (
-                  <button
-                    key={preset.id}
-                    type="button"
-                    className={[
-                      `${variant}-grid-preset-btn`,
-                      value === preset.id ? `${variant}-grid-preset-btn--on` : '',
-                    ].filter(Boolean).join(' ')}
-                    title={`${preset.label} (${preset.cols}열)`}
-                    aria-label={`${preset.label} 배치`}
-                    aria-pressed={value === preset.id}
-                    onClick={() => {
-                      onChange(preset.id);
-                      setOpen(false);
-                    }}
-                  >
-                    <LayoutIcon preset={preset} />
-                  </button>
-                ))}
-              </div>
-            </div>
-          ))}
-        </div>
-      )}
     </div>
   );
 };

frontend/src/components/virtual/VirtualGridUnifiedHeader.tsx

@@ -133,7 +133,6 @@ export const VirtualViewHeaderControls: React.FC<ViewProps> = ({
       <VirtualGridLayoutPicker
         value={gridPreset}
         onChange={onGridPresetChange}
-        disabled={!showSignalChartToggle}
       />
     )}
     {showSignalChartToggle && onGlobalDisplayModeChange && (