Fix DICOM viewer for public shares

[loxK]

• Detect public pages and use appropriate endpoint (publicdicomjson vs dicomjson)
• Add URL fallback for public page/token detection when DOM elements unavailable
• Scan clicked subfolder instead of share root for DICOM files
• Enable scanning files without proper DICOM MIME type (isOpenNoExtension)
• Use WebDAV public endpoint instead of download redirect for file access

Fixes https://github.com/ayselafsar/dicomviewer/issues/108

[mgrosse66]

I tried your fix and now it is possible to open the dicomviewer within a public share but the dicomviewer cannot open the pictures.

/nextcloud/index.php/public.php/dav/files/8HrPcxsRzLfDNZ8/wetransfer_test-ct_2025-10-24_0908/Z160 HTTP/1.1" 404 7226

[loxK]

I tried your fix and now it is possible to open the dicomviewer within a public share but the dicomviewer cannot open the pictures.

It wasn't working with Nextcloud installations not using pretty URLs. I have modified my commit. Please retry.

[mgrosse66]

Thank you very much, now the dicomviewer works with public shares.