vitepress集成algolia时，搜索报错，title为空

[demo-zexuan]

Describe the bug

咨询如上问题，vitepress集成algolia时，报错，因为对应的title为null，检查对应的页面配置发现，确实是有声明title的 请问如何解决呢？

Reproduction

如上

Expected behavior

如上

System Info

System:
    OS: macOS 26.0.1
    CPU: (10) arm64 Apple M4
    Memory: 229.45 MB / 16.00 GB
    Shell: 3.2.57 - /bin/sh
  Binaries:
    Node: 22.20.0 - /usr/local/bin/node
    Yarn: 1.22.22 - /usr/local/bin/yarn
    npm: 11.6.2 - /usr/local/bin/npm
    pnpm: 10.18.3 - /usr/local/bin/pnpm
  Browsers:
    Chrome: 141.0.7390.108
    Safari: 26.0.1
  npmPackages:
    vitepress: 2.0.0-alpha.12 => 2.0.0-alpha.12

Additional context

No response

Validations

• Check if you're on the latest VitePress version.
• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.

[demo-zexuan]

补充对应的索引上报配置

{
          	"index_name": "blog",
          	"start_urls": ["http://blog.xxxxx.com"],
          	"rateLimit": 8,
          	"maxDepth": 10,
          	"selectors": {
          		"lvl0": {
          			"selector": "",
          			"defaultValue": "Documentation"
          		},
          		"lvl1": ".content h1",
          		"lvl2": ".content h2",
          		"lvl3": ".content h3",
          		"lvl4": ".content h4",
          		"lvl5": ".content h5",
          		"content": ".content p, .content li",
          		"lang": {
          			"selector": "/html/@lang",
          			"type": "xpath",
          			"global": true
          		}
          	},
          	"selectors_exclude": ["aside", ".page-footer", ".next-and-prev-link", ".table-of-contents"],
          	"custom_settings": {
          		"attributesForFaceting": ["lang", "tags"]
          	},
          	"js_render": true
          }