chanx 01f81b24f6 Fix：Added support for preview of txt, md, excel, csv, ppt, image, doc and other files (#8712) ...

### What problem does this PR solve?

Added support for preview of txt, md, excel, csv, ppt, image, doc and
other files [#3221](https://github.com/infiniflow/ragflow/issues/3221)

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

2025-07-08 10:39:18 +08:00

4.9 KiB

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