fix(ui): 提示浮层 - 修复键盘触发并补真实交互回归

Original-Commit: ff42bb969a037f3271e3da59b752f513c3112b2d

web/test/tooltip-trigger.test.tsx

@@ -0,0 +1,30 @@
+import { expect, test } from "bun:test";
+import { renderToStaticMarkup } from "react-dom/server";
+import { Plus } from "lucide-react";
+
+import { IconButton } from "../src/components/ui/base/buttons";
+import { Tooltip } from "../src/components/ui/base/tooltip";
+
+test("tooltip gives native and custom controls one real focus target", () => {
+    for (const child of [<button aria-label="新增">+</button>, <IconButton icon={Plus} aria-label="新增" />]) {
+        const markup = renderToStaticMarkup(<Tooltip title="新增节点">{child}</Tooltip>);
+        expect(markup).toMatch(/<button[^>]*tabindex="0"/);
+        expect(markup).not.toMatch(/<span[^>]*tabindex=/);
+    }
+});
+
+test("tooltip preserves explicit tab order and disabled controls", () => {
+    const excluded = renderToStaticMarkup(
+        <Tooltip title="说明">
+            <button tabIndex={-1}>操作</button>
+        </Tooltip>,
+    );
+    expect(excluded).toMatch(/<button[^>]*tabindex="-1"/);
+    const disabled = renderToStaticMarkup(
+        <Tooltip title="不可操作">
+            <button disabled>操作</button>
+        </Tooltip>,
+    );
+    expect(disabled).toMatch(/<button[^>]*disabled/);
+    expect(disabled).not.toContain('tabindex="0"');
+});