fix: 修复初始化隐藏Tour时, defaultCurrent 未生效的问题

docs/demo/defaultCurrent.md

@@ -0,0 +1,8 @@
+---
+title: defaultCurrent
+nav:
+  title: DefaultCurrent
+  path: /defaultCurrent
+---
+
+<code src="../examples/defaultCurrent.tsx"></code>

docs/examples/defaultCurrent.tsx

@@ -0,0 +1,53 @@
+import { useRef, useState } from "react";
+import Tour from '../../src/index';
+
+export default () => {
+    const btn1Ref = useRef<HTMLButtonElement>(null);
+    const btn2Ref = useRef<HTMLButtonElement>(null);
+    const [open, setOpen] = useState(false)
+
+    return <div style={{ margin: 20 }}>
+      <div>
+        <button
+          className="ant-target"
+          ref={btn1Ref}
+          style={{ marginLeft: 100 }}
+          onClick={() => {
+            setOpen(true);
+          }}
+        >
+          button1
+        </button>
+        <button className="ant-target" ref={btn2Ref} style={{ marginLeft: 100 }}>
+          defaultOpen
+        </button>
+      </div>
+
+      <div style={{ height: 200 }} />
+
+      <Tour
+        defaultCurrent={1}
+        open={open}
+        onFinish={() => setOpen(false)}
+        onClose={() => setOpen(false)}
+        steps={[
+          {
+            title: '创建',
+            description: '创建一条数据',
+            target: () => btn1Ref.current,
+            mask: true,
+          },
+          {
+            title: '更新',
+            description: (
+              <div>
+                <span>更新一条数据</span>
+                <button>帮助文档</button>
+              </div>
+            ),
+            target: () => btn2Ref.current,
+          },
+        ]}
+      />
+    </div>
+}

src/Tour.tsx

@@ -77,7 +77,7 @@ const Tour: React.FC<TourProps> = props => {
   useLayoutEffect(() => {
     if (mergedOpen) {
       if (!openRef.current) {
-        setMergedCurrent(0);
+        setMergedCurrent(defaultCurrent ?? 0);
       }
 
       setHasOpened(true);