[dolphin] [Bug 516359] New: Dolphin fails to preview WebP images saved with .jpg extension

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https://bugs.kde.org/show_bug.cgi?id=516359

            Bug ID: 516359
           Summary: Dolphin fails to preview WebP images saved with .jpg
                    extension
    Classification: Applications
           Product: dolphin
      Version First 25.12.2
       Reported In:
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-n...@kde.org
          Reporter: nekosk...@proton.me
                CC: dolphin-bugs-n...@kde.org
  Target Milestone: ---

Created attachment 189851
  --> https://bugs.kde.org/attachment.cgi?id=189851&action=edit
test.jpg: RIFF (little-endian) data, Web/P image, lossless, with alpha

SUMMARY
If file extension of image is mistyped to jpeg, image preview doesn't work.
That's tested for webp, png and tiff. If you rename image file to any image
extension or no extension at all, preview works fine. 
An example image is attached.
Probably mime type recognition breaks when extension is set to .jpg .jpeg .jfif

STEPS TO REPRODUCE
1. Rename not .jpg image to .jpg

OBSERVED RESULT
No preview

EXPECTED RESULT
Image preview

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.6.0
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.2
Kernel Version: 6.18.9-arch1-2 (64-bit)
Graphics Platform: Wayland

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