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/src/utils/documentCenterNewState.js

@@ -0,0 +1,71 @@
+const STORAGE_KEY = 'x-financial.documents.viewed'
+const SCOPE_STORAGE_KEY = 'x-financial.documents.scope'
+
+function getStorage() {
+  return typeof window === 'undefined' ? null : window.localStorage
+}
+
+export function resolveDocumentNewKey(row) {
+  const source = String(row?.source || 'document').trim()
+  const id = String(row?.claimId || row?.documentNo || row?.documentKey || row?.id || '').trim()
+  return id ? `${source}:${id}` : ''
+}
+
+export function readViewedDocumentKeys(storage = getStorage()) {
+  if (!storage) {
+    return new Set()
+  }
+
+  try {
+    const parsed = JSON.parse(storage.getItem(STORAGE_KEY) || '[]')
+    return new Set(Array.isArray(parsed) ? parsed.map((item) => String(item || '').trim()).filter(Boolean) : [])
+  } catch {
+    return new Set()
+  }
+}
+
+export function writeViewedDocumentKeys(keys, storage = getStorage()) {
+  if (!storage) {
+    return
+  }
+
+  storage.setItem(STORAGE_KEY, JSON.stringify(Array.from(keys).filter(Boolean)))
+}
+
+export function readDocumentScope(fallback, allowedScopes = [], storage = getStorage()) {
+  if (!storage) {
+    return fallback
+  }
+
+  const storedScope = String(storage.getItem(SCOPE_STORAGE_KEY) || '').trim()
+  return allowedScopes.includes(storedScope) ? storedScope : fallback
+}
+
+export function writeDocumentScope(scope, allowedScopes = [], storage = getStorage()) {
+  if (!storage || !allowedScopes.includes(scope)) {
+    return
+  }
+
+  storage.setItem(SCOPE_STORAGE_KEY, scope)
+}
+
+export function isNewDocument(row, viewedKeys) {
+  const key = resolveDocumentNewKey(row)
+  return Boolean(key) && !viewedKeys.has(key)
+}
+
+export function countNewDocuments(rows, viewedKeys) {
+  return rows.filter((row) => isNewDocument(row, viewedKeys)).length
+}
+
+export function markDocumentViewed(row, viewedKeys, storage = getStorage()) {
+  const key = resolveDocumentNewKey(row)
+  if (!key) {
+    return viewedKeys
+  }
+
+  const nextKeys = new Set(viewedKeys)
+  nextKeys.add(key)
+  writeViewedDocumentKeys(nextKeys, storage)
+  return nextKeys
+}