fix(pkb): fix create KB and upload issues - remove simulated upload, fix department mapping, add upload modal

Fixed issues:
- Remove simulateUpload function from DashboardPage Step 3
- Map department to description field when creating KB
- Add upload modal in WorkspacePage knowledge assets tab
- Fix DocumentUpload import path (../../stores to ../stores)

Known issue: Dify API validation error during document upload (file uploaded but DB record failed, needs investigation)

Testing: KB creation works, upload dialog opens correctly

frontend-v2/src/modules/asl/api/index.ts

@@ -14,10 +14,25 @@ import type {
   PaginatedResponse,
   ProjectStatistics
 } from '../types';
+import { getAccessToken } from '../../../framework/auth/api';
 
 // API基础URL
 const API_BASE_URL = '/api/v1/asl';
 
+/**
+ * 获取带认证的请求头
+ */
+function getAuthHeaders(): HeadersInit {
+  const headers: Record<string, string> = {
+    'Content-Type': 'application/json',
+  };
+  const token = getAccessToken();
+  if (token) {
+    headers['Authorization'] = `Bearer ${token}`;
+  }
+  return headers;
+}
+
 // 通用请求函数
 async function request<T = any>(
   url: string,
@@ -26,7 +41,7 @@ async function request<T = any>(
   const response = await fetch(`${API_BASE_URL}${url}`, {
     ...options,
     headers: {
-      'Content-Type': 'application/json',
+      ...getAuthHeaders(),
       ...options?.headers,
     },
   });
@@ -239,7 +254,8 @@ export async function exportScreeningResults(
   ).toString();
   
   const response = await fetch(
-    `${API_BASE_URL}/projects/${projectId}/screening/results/export?${queryString}`
+    `${API_BASE_URL}/projects/${projectId}/screening/results/export?${queryString}`,
+    { headers: getAuthHeaders() }
   );
 
   if (!response.ok) {
@@ -409,7 +425,8 @@ export async function exportFulltextResults(
   taskId: string
 ): Promise<Blob> {
   const response = await fetch(
-    `${API_BASE_URL}/fulltext-screening/tasks/${taskId}/export`
+    `${API_BASE_URL}/fulltext-screening/tasks/${taskId}/export`,
+    { headers: getAuthHeaders() }
   );
 
   if (!response.ok) {