fix(files_sharing): federated shares avatar

Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

apps/files_sharing/src/utils/AccountIcon.ts

@@ -8,8 +8,16 @@ const isDarkMode = window?.matchMedia?.('(prefers-color-scheme: dark)')?.matches
 	|| document.querySelector('[data-themes*=dark]') !== null
 
 export const generateAvatarSvg = (userId: string, isGuest = false) => {
-	const url = isDarkMode ? '/avatar/{userId}/32/dark' : '/avatar/{userId}/32'
-	const avatarUrl = generateUrl(isGuest ? url : url + '?guestFallback=true', { userId })
+	// normal avatar url: /avatar/{userId}/32?guestFallback=true
+	// dark avatar url: /avatar/{userId}/32/dark?guestFallback=true
+	// guest avatar url: /avatar/guest/{userId}/32
+	// guest dark avatar url: /avatar/guest/{userId}/32/dark
+	const basePath = isGuest ? `/avatar/guest/${userId}` : `/avatar/${userId}`
+	const darkModePath = isDarkMode ? '/dark' : ''
+	const guestFallback = isGuest ? '' : '?guestFallback=true'
+
+	const url = `${basePath}/32${darkModePath}${guestFallback}`
+	const avatarUrl = generateUrl(url, { userId })
 	return `<svg width="32" height="32" viewBox="0 0 32 32"
 		xmlns="http://www.w3.org/2000/svg" class="sharing-status__avatar">
 		<image href="${avatarUrl}" height="32" width="32" />