add MinerU cloud API support

[technoadnan]

Summary

When configuring https://mineru.net as the MinerU base URL, requests were incorrectly routed to the self-hosted code path (POST /file_parse), causing 413 errors. The PDF would then silently fall back to unpdf instead of using MinerU cloud. This happens because the cloud API follows this structure, upload + async polling + ZIP download.

Changes

• lib/pdf/pdf-providers.ts — detect mineru.net base URL and route to cloud v4 path
• lib/pdf/mineru-cloud.ts — new file handling the full cloud v4 flow (upload → poll → ZIP parse)
• lib/pdf/mineru-parser.ts — new file normalizing MinerU output into ParsedPdfContent, shared by both self-hosted and cloud paths
• lib/pdf/types.ts — added mineruModelVersion field to PDFParserConfig to support switching between vlm and pipeline model versions

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)

Verification

Steps to reproduce the tests:

1. Set MinerU base URL to https://mineru.net with a valid API token
2. Upload a PDF
3. Observe logs show cloud v4 routing, presigned upload, and successful parse
4. Verify self-hosted deployments with other base URLs work unchanged

Proof

Before

After

What you personally verified:

• https://mineru.net correctly routes to cloud v4
• Self-hosted URLs fall through to the original code path unchanged
• tsc --noEmit passes cleanly

Checklist

• I have performed a self-review of my code
• My changes do not introduce new warnings

[fubaobao2023]

你的意思是https://mineru.net为mineru的base url吗?但是


我这样设置了 我去前端上传 PDF 依然解析不了 出现,

[fubaobao2023]

mineru 这个地方就不能引导性的 填写一个标准的 base URL地址吗?让用户自己去猜是不是不太好,就好比其他API接口 都有填写 这个API地址是多少

[fubaobao2023]

而且mineru的官方说明是:
也就是:https://mineru.net/api/v4/extract/task或者https://mineru.net/api/v4/file-urls/batch,但是就算按照官方的 这两个API 填写 然后输入KEY 点击openmaic 点击测试,依然显示通过,但是去上传PDF 依然没办法解析 返回错误,你这个接口这里必须优化一下

[fubaobao2023]

的意思是https://mineru.net为mineru的base url吗？ 我这样设置了我去前端上传你PDF依然解析不了出现，

这个提示的失败我刚刚测试了,不管是用UNPDF 还是mineru 都是返回这样的失败 需要你们进一步排查

[fubaobao2023]

前端对PDF的文件大小做了限制?这里可否在设置API哪里让用户 根据调用接口不一样选择呢?让用户傻瓜式操作 这是我的curl [新建文本文档.txt](https://github.com/user-attachments/files/26228793/default.txt)

[fubaobao2023]

mineru官方技术反馈 接口代码有问题

[fubaobao2023]

核心问题确认：
OpenMAIC调用的是自托管MinerU API（/file_parse文件上传），但是MinerU官方云API（需要url参数）

解决方案：需要修改OpenMAIC代码来适配官方API
所以这里在mineru选择这里 就要新增选项 是采用API 还是自托管

[fubaobao2023]

@wyuc @claude @technoadnan