refac

src/lib/components/chat/Messages/Markdown/MarkdownInlineTokens.svelte

@@ -107,6 +107,8 @@
 		<br />
 	{:else if token.type === 'del'}
 		<del><svelte:self id={`${id}-del`} tokens={token.tokens} {onSourceClick} /></del>
+	{:else if token.type === 'underline'}
+		<u><svelte:self id={`${id}-underline`} tokens={token.tokens} {onSourceClick} /></u>
 	{:else if token.type === 'inlineKatex'}
 		{#if token.text}
 			<KatexRenderer content={token.text} displayMode={token?.displayMode ?? false} />

src/lib/components/common/RichTextInput.svelte

@@ -125,6 +125,11 @@
 		}
 	});
 
+	turndownService.addRule('underline', {
+		filter: 'u',
+		replacement: (content) => `<u>${content}</u>`
+	});
+
 	import { onMount, onDestroy, tick, getContext } from 'svelte';
 	import { createEventDispatcher } from 'svelte';