feat: 新增归档中心页面并完善知识库与报销查询能力

新增前端归档中心视图及相关工具函数，扩充知识库文档分类和
提取器支持多种格式，增强编排器报销查询的多维度检索，优
化本体规则和用户代理审核消息，前端完善报销创建和审批详
情交互细节，补充单元测试覆盖。

web/tests/knowledge-folder-selection.test.mjs

@@ -1,6 +1,9 @@
 import assert from 'node:assert/strict'
 
-import { resolveInitialKnowledgeFolder } from '../src/views/scripts/knowledgeFolderSelection.js'
+import {
+  resolveInitialKnowledgeFolder,
+  resolveKnowledgeFolderIcon
+} from '../src/views/scripts/knowledgeFolderSelection.js'
 
 function testFallsBackToFirstFolderWhenCurrentFolderDoesNotExist() {
   const folders = [{ name: '财务知识库' }, { name: '制度政策' }, { name: '差旅规范' }]
@@ -18,10 +21,22 @@ function testReturnsEmptyStringWhenFoldersAreEmpty() {
   assert.equal(resolveInitialKnowledgeFolder([], '差旅规范'), '')
 }
 
+function testUsesOpenIconForActiveFolderOnly() {
+  assert.equal(
+    resolveKnowledgeFolderIcon({ name: '差旅规范', icon: 'mdi mdi-folder' }, '差旅规范'),
+    'mdi mdi-folder-open'
+  )
+  assert.equal(
+    resolveKnowledgeFolderIcon({ name: '制度政策', icon: 'mdi mdi-folder-open' }, '差旅规范'),
+    'mdi mdi-folder'
+  )
+}
+
 function run() {
   testFallsBackToFirstFolderWhenCurrentFolderDoesNotExist()
   testKeepsCurrentFolderWhenItStillExists()
   testReturnsEmptyStringWhenFoldersAreEmpty()
+  testUsesOpenIconForActiveFolderOnly()
   console.log('knowledge folder selection tests passed')
 }