feat(knowledge): support standalone file ingestion and configurable wiki entry

Use neutral knowledge-service labels and sanitize user-facing task errors.

frontend-web/src/core/system-settings/api.ts

@@ -11,6 +11,22 @@ export interface PromptPrefixSettings {
 
 export type KnowledgeBaseProductVersion = "v1" | "v2";
 
+export type OrdinaryKnowledgeLanding = "wiki" | "weknora";
+
+export async function loadOrdinaryKnowledgeLanding(): Promise<OrdinaryKnowledgeLanding> {
+  const response = await apiFetch(`${getBackendBaseURL()}/api/system-settings/ordinary-knowledge-landing`);
+  if (!response.ok) throw new Error("无法读取普通知识库默认页面设置");
+  return ((await response.json()) as { mode: OrdinaryKnowledgeLanding }).mode;
+}
+
+export async function saveOrdinaryKnowledgeLanding(mode: OrdinaryKnowledgeLanding): Promise<OrdinaryKnowledgeLanding> {
+  const response = await apiFetch(`${getBackendBaseURL()}/api/system-settings/ordinary-knowledge-landing`, {
+    method: "PUT", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ mode }),
+  });
+  if (!response.ok) throw new Error("保存失败，仅管理员可配置普通知识库默认页面");
+  return ((await response.json()) as { mode: OrdinaryKnowledgeLanding }).mode;
+}
+
 export async function loadKnowledgeBaseProductVersion(): Promise<KnowledgeBaseProductVersion> {
   const response = await apiFetch(
     `${getBackendBaseURL()}/api/system-settings/knowledge-base-product-version`,