fix(frontend): Fix FileInput state when hidden (#3730)

frontend/src/lib/components/apps/components/inputs/AppFileInput.svelte

@@ -46,6 +46,8 @@
 			fileInput?.clearFiles()
 		}
 	}
+
+	let files: File[] | undefined = undefined
 </script>
 
 {#each Object.keys(css ?? {}) as key (key)}
@@ -90,6 +92,7 @@
 			class={twMerge('w-full h-full', css?.container?.class, 'wm-file-input')}
 			style={css?.container?.style}
 			submittedText={submittedFileText}
+			bind:files
 		>
 			{text}
 		</FileInput>

frontend/src/lib/components/common/fileInput/FileInput.svelte

@@ -21,7 +21,7 @@
 
 	const dispatch = createEventDispatcher()
 	let input: HTMLInputElement
-	let files: File[] | undefined = undefined
+	export let files: File[] | undefined = undefined
 
 	async function onChange(fileList: FileList | null) {
 		if (!fileList || !fileList.length) {