enforce strict typescript

frontend/src/lib/ui/FileUpload.svelte

@@ -12,7 +12,7 @@
 
 	async function onInput(e: Event) {
 		const input = e.target as HTMLInputElement
-		if (input.files.length) {
+		if (input?.files?.length) {
 			files = Array.from(input.files)
 			const data: FileDTO[] = await Promise.all(
 				files.map(async (file) => ({

frontend/src/lib/ui/TextInput.svelte

@@ -8,7 +8,7 @@
 	import Icon from './Icon.svelte'
 
 	export let label: string = ''
-	export let value: string | number
+	export let value: any
 
 	export let copy: boolean = false
 	export let random: boolean = false