fix(files): Ensure the filter instance is mounted

`reset` could be called before the filters are mounted,
in this case it is valid to update the presets, but we must not try to
access the vue instance (as it does not exist yet).

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

apps/files/src/filters/HiddenFilesFilter.ts

@@ -15,7 +15,7 @@ class HiddenFilesFilter extends FileListFilter {
 
 	constructor() {
 		super('files:hidden', 0)
-		this.showHidden = loadState<UserConfig>('files', 'config', { show_hidden: false }).show_hidden
+		this.showHidden = loadState<Partial<UserConfig>>('files', 'config', { show_hidden: false }).show_hidden
 
 		subscribe('files:config:updated', ({ key, value }) => {
 			if (key === 'show_hidden') {

apps/files/src/filters/TypeFilter.ts

@@ -149,7 +149,12 @@ class TypeFilter extends FileListFilter {
 
 	public setPresets(presets?: ITypePreset[]) {
 		this.currentPresets = presets ?? []
-		this.currentInstance!.$props.presets = presets
+		if (this.currentInstance !== undefined) {
+			// could be called before the instance was created
+			// (meaning the files list is not mounted yet)
+			this.currentInstance.$props.presets = presets
+		}
+
 		this.filterUpdated()
 
 		const chips: IFileListFilterChip[] = []