feat: 报销审批流重构与管家计划全链路贯通

- 重构报销状态注册表、审批流路由与平台风险标记
- 完善管家意图规划器与模型计划构建器全链路
- 新增 OCR Worker 脚本、数据库会话管理与通知状态
- 优化文档中心、日志视图、预算中心与员工管理交互
- 增强工作台摘要、图标资源与全局主题样式
- 补充审批路由、状态注册、OCR 服务与管家规划器测试覆盖

web/src/assets/workbench-icons/outline-budget.svg

@@ -1,5 +1,8 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
-  <path d="M12 4.5v7h7A7 7 0 1 1 12 4.5Z"/>
-  <path d="M14.5 3.8A7.2 7.2 0 0 1 20.2 9h-5.7Z"/>
-  <path d="M7.5 16.5h4M7.5 13.5H10"/>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.55" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+  <path class="icon-fill" d="M11.6 4.2a7.5 7.5 0 1 0 7.5 7.5h-7.5Z"/>
+  <path d="M11.6 4.2a7.5 7.5 0 1 0 7.5 7.5h-7.5Z"/>
+  <path class="icon-accent" d="M14.3 3.9a7.3 7.3 0 0 1 5.8 5.7h-5.8Z"/>
+  <path d="M7.5 15.7h4.5"/>
+  <path class="icon-muted" d="M7.5 18h3.1"/>
+  <path d="M16.8 14.6v2.9M19.2 13.2v4.3"/>
 </svg>