refac

src/lib/components/chat/Chat.svelte

@@ -3011,7 +3011,7 @@
 										if (e.detail || files.length > 0) {
 											await tick();
 
-											submitHandler(e.detail.replaceAll('\n\n', '\n'));
+											submitHandler(e.detail);
 										}
 									}}
 								/>
@@ -3054,7 +3054,7 @@
 										clearDraft();
 										if (e.detail || files.length > 0) {
 											await tick();
-											submitHandler(e.detail.replaceAll('\n\n', '\n'));
+											submitHandler(e.detail);
 										}
 									}}
 								/>

src/lib/components/common/RichTextInput.svelte

@@ -36,6 +36,18 @@
 	});
 	turndownService.escape = (string) => string;
 
+	// Produce single newlines between paragraphs instead of double.
+	// TipTap wraps every line in <p> tags; the default Turndown rule emits
+	// \n\n around each paragraph which then required a destructive
+	// replaceAll('\n\n','\n') that also wiped blank lines inside code blocks.
+	// This rule eliminates that hack so <pre><code> content is untouched.
+	turndownService.addRule('singleNewlineParagraphs', {
+		filter: 'p',
+		replacement: function (content) {
+			return '\n' + content + '\n';
+		}
+	});
+
 	// Use turndown-plugin-gfm for proper GFM table support
 	turndownService.use(gfm);
 
@@ -435,7 +447,6 @@
 
 	export const setText = (text: string) => {
 		if (!editor || !editor.view) return;
-		text = text.replaceAll('\n\n', '\n');
 
 		if (text === '') {
 			editor.commands.clearContent();