v5.5.0-squashed-bugs

Complete Stability - Video Player and Search Bug Fixed !!

1. Add a clean file cache
2. Beautification: Display icon when mesh mode file does not have a preview
3. Beautify: Adjust head.md rendering position
4. Resolving a search cannot preview the file click can not download directly
5. Fix an issue in the file name that has a problem in which you can't open
6. Fixes an issue where switching pages in the current page load will fall back
7. Some Beautification Fixes.