feat: 报销预审会话状态管理与工作台交互增强

- 新增差旅报销会话状态管理与对话模型重构
- 增强风险观测服务与运行时聊天上下文作用域
- 优化工作台图标资源、助理意图识别与摘要工具
- 完善报销创建视图样式与差旅详情页标准调整交互
- 补充风险观测、运行时聊天与报销端点测试覆盖

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

@@ -0,0 +1,6 @@
+<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="M8.5 4.5h7A1.5 1.5 0 0 1 17 6v13a1.5 1.5 0 0 1-1.5 1.5h-9A1.5 1.5 0 0 1 5 19V6a1.5 1.5 0 0 1 1.5-1.5h2"/>
+  <path d="M8.5 4.5A2 2 0 0 1 10.5 3h2A2 2 0 0 1 14.5 4.5v1h-6Z"/>
+  <path d="M8.5 12.8 11 15.2l5-5.2"/>
+  <path d="M8 18h7"/>
+</svg>

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

@@ -0,0 +1,5 @@
+<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>

web/src/assets/workbench-icons/outline-expense-application.svg

@@ -0,0 +1,6 @@
+<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="M7 3.5h7l3 3v13a1.5 1.5 0 0 1-1.5 1.5h-8A1.5 1.5 0 0 1 6 19.5v-15A1.5 1.5 0 0 1 7.5 3.5Z"/>
+  <path d="M14 3.5V7h3.5"/>
+  <path d="M9 11h6M9 14h3"/>
+  <path d="M15.5 13.5v4M13.5 15.5h4"/>
+</svg>

web/src/assets/workbench-icons/outline-finance-analysis.svg

@@ -0,0 +1,6 @@
+<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="M4.5 19.5h15"/>
+  <path d="M6 16.5V8.8M10 16.5V5.5M14 16.5v-6M18 16.5V7"/>
+  <path d="M6 12.5c2.2-3.2 4-1.2 6.2-4.1 1.5-2 3-1.3 5.3-3.4"/>
+  <path d="m17.6 5 .4 3.2-3.1-.5"/>
+</svg>

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

@@ -0,0 +1,6 @@
+<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="M5.5 5.5A2.5 2.5 0 0 1 8 3h12v16.5H8A2.5 2.5 0 0 0 5.5 22Z"/>
+  <path d="M5.5 5.5v16"/>
+  <path d="M9 7.5h7M9 10.5h6M9 14.5h4"/>
+  <path d="M17 3v16.5"/>
+</svg>

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

@@ -0,0 +1,6 @@
+<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="M6.5 4.5h9.8A1.7 1.7 0 0 1 18 6.2v13.3l-2.2-1.2-2.2 1.2-2.2-1.2-2.2 1.2-2.2-1.2-2.2 1.2V6.2a1.7 1.7 0 0 1 1.7-1.7Z"/>
+  <path d="M8 9h8M8 12h6"/>
+  <path d="M9 15.5h2.7c1.8 0 3.3-1.4 3.3-3.2v-.8"/>
+  <path d="m13.3 10 1.7 1.7 1.7-1.7"/>
+</svg>