text input: change default asterisk behaviour

asterisk now shown by default if field is required.

src/lib/TextInput.svelte

@@ -11,7 +11,7 @@
 		value?: string;
 		invalidMessage?: string | null;
 		ref?: HTMLInputElement | null;
-		asterisk?: boolean;
+		asterisk?: boolean | null;
 		class?: ClassValue | null | undefined;
 	}
 
@@ -21,12 +21,16 @@
 		value = $bindable(''),
 		invalidMessage = 'Field is required',
 		ref = $bindable<HTMLInputElement | null>(null),
-		asterisk = false,
+		asterisk = null,
 		class: classValue,
+		forceInvalid = false,
 		...others
 	}: Props = $props();
 
 	let valid: boolean = $state(true);
+	let displayAsterisk = $derived(
+		asterisk === true || (asterisk !== false && others.validate && others.validate.required)
+	);
 
 	export const focus = () => {
 		if (ref) ref.focus();
@@ -37,7 +41,7 @@
 	{#if label}
 		<Label for={id}>
 			{label}
-			{#if asterisk}
+			{#if displayAsterisk}
 				<span class="text-red-500">*</span>
 			{/if}
 		</Label>
@@ -50,11 +54,12 @@
 		onvalidate={(e) => {
 			valid = e.detail.valid;
 		}}
+		{forceInvalid}
 		{...others}
 	/>
 
 	{#if others.validate && invalidMessage !== null}
-		<div class={['opacity-0 transition-opacity', !valid && 'opacity-100']}>
+		<div class={['opacity-0 transition-opacity', (!valid || forceInvalid) && 'opacity-100']}>
 			<Label for={id} error>
 				{invalidMessage}
 			</Label>