fix: use incorrect suffix and return no 500(#1972、#1967) #1973
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When watch Video at filebrowser, there will be a
500server error at right bottom of the page #1972The reason is SideBar.vue will check disk useage when route changes, but when path is a file, server will return a
500errorBefore:
file: 500 error
dir: true useage
After:
file: 0 useage
dir: true useage