feat: 完善文档中心与报销申请交互及侧边栏重构

后端优化编排器报销查询和本体检测精度，增强报销单草稿保
存和附件回填逻辑，前端重构侧边栏组件支持折叠和图标导
航，完善文档中心状态筛选和详情提示，报销创建和审批详情
页优化会话管理和费用明细交互，新增助手应用服务和预设动
作工具函数，补充单元测试覆盖。

web/tests/travel-reimbursement-composer-tools.test.mjs

@@ -34,6 +34,28 @@ test('composer formats date-picker expense text into readable structured fields'
   )
 })
 
+test('composer extracts destination and reason from compact travel text', () => {
+  const formatted = buildStructuredComposerSubmitText(
+    '出差上海，支撑国网服务器上线部署',
+    {
+      mode: 'single',
+      start_date: '2026-05-25',
+      end_date: '2026-05-25',
+      business_time: '2026-05-25'
+    }
+  )
+
+  assert.equal(
+    formatted,
+    [
+      '发生时间：2026-05-25',
+      '地点：上海',
+      '事由：支撑国网服务器上线部署',
+      '天数：1天'
+    ].join('\n')
+  )
+})
+
 test('composer keeps backend raw text but displays structured user message', () => {
   assert.match(submitComposerScript, /const rawText = resolveComposerSubmitText\(options\.rawText\)\.trim\(\)/)
   assert.match(submitComposerScript, /resolveComposerDisplaySubmitText\(rawText\)/)