优化表单提交错误处理逻辑，调整错误提示的属性名称；移除未使用的文档获取函数，简化知识查询逻辑。

frontend/src/components/modals/LibraryFormDialog.vue

@@ -78,14 +78,14 @@ const handleSubmit = async () => {
 	} catch (error) {
 		if (error instanceof z.ZodError) {
 			alertStore.showAlert({
-				type: "error",
-				message: error.errors[0].message,
+				level: "error",
+				content: error.errors[0].message,
 			});
 		} else {
 			console.error("表单提交错误:", error);
 			alertStore.showAlert({
-				type: "error",
-				message: "表单提交失败，请重试",
+				level: "error",
+				content: "表单提交失败，请重试",
 			});
 		}
 	}

frontend/src/composables/knowledge/useKnowledgeQuery.ts

@@ -30,17 +30,6 @@ export const useKnowledgeQuery = () => {
 		docs.value = data || [];
 	};
 
-	const fetchDocById = async (docId: number) => {
-		const { data } = await client.GET("/knowledge/docs", {
-			params: {
-				query: {},
-			},
-		});
-		if (data && Array.isArray(data)) {
-			doc.value = data.find((item) => item.id === docId) || null;
-		}
-	};
-
 	const fetchDocSegments = async (params: SegmentQueryParams) => {
 		const { data } = await client.GET("/knowledge/segments", {
 			params: {
@@ -58,7 +47,6 @@ export const useKnowledgeQuery = () => {
 		docs,
 		fetchLibraryDocs,
 		doc,
-		fetchDocById,
 		segments,
 		fetchDocSegments,
 	};