enh: rich text input preserve breaks

src/lib/components/workspace/Knowledge/KnowledgeBase.svelte

@@ -817,6 +817,7 @@
 												className="input-prose-sm"
 												bind:value={selectedFile.data.content}
 												placeholder={$i18n.t('Add content here')}
+												preserveBreaks={true}
 											/>
 										{/key}
 									</div>

src/lib/components/workspace/Knowledge/KnowledgeBase/AddTextContentModal.svelte

@@ -67,7 +67,11 @@
 					</div>
 
 					<div class=" flex-1 w-full h-full">
-						<RichTextInput bind:value={content} placeholder={$i18n.t('Write something...')} />
+						<RichTextInput
+							bind:value={content}
+							placeholder={$i18n.t('Write something...')}
+							preserveBreaks={true}
+						/>
 					</div>
 				</div>
 			</div>