feat(screener): GateNodeCard for hygiene gate

src/pages/stock/screener/components/canvas/nodes/GateNodeCard.jsx

@@ -0,0 +1,72 @@
+import React, { memo, useState } from 'react';
+import { Handle, Position } from '@xyflow/react';
+
+function ParamField({ name, schema, value, onChange }) {
+  if (schema?.type === 'boolean') {
+    return (
+      <label className="canvas-param-field">
+        <input
+          type="checkbox"
+          checked={!!value}
+          onChange={(e) => onChange(name, e.target.checked)}
+        />
+        <span>{schema.label || name}</span>
+      </label>
+    );
+  }
+  return (
+    <label className="canvas-param-field">
+      <span>{schema?.label || name}</span>
+      <input
+        type="number"
+        value={value ?? schema?.default ?? 0}
+        step={schema?.step ?? 1}
+        onChange={(e) => onChange(name, Number(e.target.value))}
+      />
+    </label>
+  );
+}
+
+function GateNodeCard({ data }) {
+  const { meta, params, onChange, description } = data;
+  const [expanded, setExpanded] = useState(false);
+
+  const update = (key, v) => onChange({ ...params, [key]: v });
+
+  return (
+    <div className="canvas-node canvas-node--gate">
+      <Handle type="target" position={Position.Left} isConnectable={false} />
+      <div className="canvas-node-title">
+        <span className="canvas-node-icon">🛡️</span>
+        <span>{meta?.label || '위생 게이트'}</span>
+        {description && (
+          <span className="canvas-node-info" title={description}>ⓘ</span>
+        )}
+      </div>
+      <div className="canvas-node-summary">통과해야 점수 단계 진입</div>
+      <button
+        type="button"
+        className="canvas-node-expand"
+        onClick={() => setExpanded((v) => !v)}
+      >
+        {expanded ? '▴ 파라미터' : '▾ 파라미터'}
+      </button>
+      {expanded && (
+        <div className="canvas-node-params">
+          {Object.entries(meta?.param_schema || {}).map(([key, schema]) => (
+            <ParamField
+              key={key}
+              name={key}
+              schema={schema}
+              value={params?.[key]}
+              onChange={update}
+            />
+          ))}
+        </div>
+      )}
+      <Handle type="source" position={Position.Right} isConnectable={false} />
+    </div>
+  );
+}
+
+export default memo(GateNodeCard);