v0.8.5-beta

## What's Changed

> [!CAUTION]
> There have been a few regressions found: onlyoffice support and some document preview issues, webp preview, and inablity to scroll user edit menu. A fix will be released in the next couple of days. If these issues don't bother you, feel free to use this release in the meantime.

 **New Features**:
 - backend media metadata processing
   - significantly improved performance
   - album artwork shows in listing view as preview thumbnail Album art thumbnail (when enabled `indexAlbumArt: true` -- can slow down indexing if there's many audio files) #925
   - Folders can show album art if `Show thumbnails for folders if available` is enabled in profile settings.
   - removed need for frontend dependencies.
 - optional thumbnail support for folders -- uses first child item with thumbnail as cover. Useful in combination with album metadata support to show album covers for folders with music.
 - Remember folder view type (and sorting) for each folder #966
 - heic is supported in viewer (via ffmpeg conversion) when on non-safari browser. This can be enabled via `integrations.ffmpeg.convert.impagePreview.heic: true` #1191
 - OnlyOffice: Add option to open documents in viewer mode (`integrations.office.viewOnly`) #1193
 - Exclude folders and file names 'starting with' or wildcard option #1054
 - added better info for failed uploads #1050
 - upload prompt "clear completed" can be changed to "clear all" in uploads & downloads settings to clear error and conflict states as well. #1128
 - share 'default view mode' option #1212
 - Universal Next/Previous buttons
   - available for all listing items (including office/markdown etc)
   - remembers sort order from parent directory
   - new "Quick Jump" prompt if you drag the next/previous icons. This shows other files available to "jump" directly to quickly.

 **Notes**:
 - Added more tests to ensure new features work in future.
 - caching for preview images is md5 based. Moved, renamed, or duplicate images don't get re-generated. Same album artwork shares cache.
 - Hide @eaDir folder by default #1212
 - defaults to hide "@eadir" folders (common for synology) #1212
 - After move/copy, ability to move to the destination folder #999

 **BugFixes**:
 - Access Management: issue with access settings #1195
 - fix shutdown panic related to sse connection
 - Custom theming not working in 0.8.4 beta #1204
 - Config Viewer not working #1189
 - "Path not found" when trying to share a file or folder inside a sub-directory #1139
 - files containing "+" in share issue #1089

## New Contributors
* @NotAlexNoyle made their first contribution in https://github.com/gtsteffaniak/filebrowser/pull/1205
* @HRTK92 made their first contribution in https://github.com/gtsteffaniak/filebrowser/pull/1215

<img width="346" height="143" alt="image" src="https://github.com/user-attachments/assets/e14340ab-bfe4-49e6-b93f-aaace1e399c3" />
<img width="391" height="237" alt="image" src="https://github.com/user-attachments/assets/b1c86efa-16d5-40b7-8193-7091e9c75b13" />
<img width="671" height="322" alt="image" src="https://github.com/user-attachments/assets/ca8a9c62-7f03-4663-8e8e-ca059370fed3" />

**Full Changelog**: https://github.com/gtsteffaniak/filebrowser/pull/1218