feat: 知识库递归导入（从指定父节点，不需要空间权限）

- feishu_service.py: import_space_nodes 改为 import_nodes_from_parent
  从指定父节点递归获取子节点，不需要空间级别权限
- admin_knowledge.py: import API 增加 parent_node_token 参数
- api.ts/App.vue: 前端增加父节点 NodeToken 输入框

ai_knowledge_base_v2/apps/admin-web/src/App.vue

@@ -37,6 +37,9 @@ const chatDetailOpen = ref(false);
 const recordTab = ref("chats");
 const editingModelId = ref<number | null>(null);
 const editingKnowledgeId = ref<number | null>(null);
+const batchSpaceId = ref("");
+const batchParentToken = ref("");
+const batchImporting = ref(false);
 const agentDebugging = ref(false);
 const agentPreviewMessages = ref<{ role: "user" | "assistant" | "system"; content: string }[]>([
   { role: "assistant", content: "选择模型和知识库后，可以在这里调试 Agent 的真实问答效果。" },
@@ -589,6 +592,27 @@ function resetKnowledgeForm() {
   Object.assign(knowledgeForm, { name: "", feishuSpaceId: "", feishuNodeId: "", status: 1, remark: "" });
 }
 
+async function batchImportKnowledge() {
+  const spaceId = batchSpaceId.value.trim();
+  const parentToken = batchParentToken.value.trim();
+  if (!spaceId || !parentToken) {
+    ElMessage.warning("请输入 SpaceID 和父节点 NodeToken");
+    return;
+  }
+  batchImporting.value = true;
+  try {
+    const result = await api.importKnowledgeFromSpace(JSON.stringify({ spaceId, parent_node_token: parentToken }));
+    ElMessage.success(`导入完成：新增 ${result.imported} 个，跳过 ${result.skipped} 个`);
+    batchSpaceId.value = "";
+    batchParentToken.value = "";
+    await loadCurrentMenu();
+  } catch (e: any) {
+    ElMessage.error(e.message || "导入失败");
+  } finally {
+    batchImporting.value = false;
+  }
+}
+
 async function savePrompt() {
   const result = await api.savePrompt(promptContent.value);
   promptContent.value = result.promptContent;
@@ -1101,6 +1125,13 @@ function buildChatQuery() {
               <el-button @click="resetKnowledgeForm">清空</el-button>
             </div>
           </el-form>
+
+          <el-divider />
+          <div class="batch-import-row">
+            <el-input v-model="batchSpaceId" placeholder="SpaceID" style="width: 220px" />
+            <el-input v-model="batchParentToken" placeholder="父节点 NodeToken（如 wikcnXXX）" style="width: 260px" />
+            <el-button type="primary" @click="batchImportKnowledge" :loading="batchImporting">递归导入子节点</el-button>
+          </div>
           <el-table :data="knowledge" stripe>
             <el-table-column prop="id" label="ID" width="80" />
             <el-table-column prop="name" label="名称" min-width="160" />