feat(web): 工作台 AI 模式与差旅/风险建议交互优化

- 新增 PersonalWorkbenchAiMode 组件、AI 侧边栏与 orb 机器人视觉资源
- 新增 aiApplicationDraftModel / aiExpenseDraftModel / aiWorkbenchConversationStore
  及业务准入 aiSidebarBusinessAccess，支撑 AI 模式下的申请与报销草稿
- 顶栏、侧边栏、工作台样式重构，适配 AI 模式切换与响应式布局
- 同步 steward plan/off_topic、差旅报销引导流、风险建议卡片等测试

web/tests/assistant-suggested-action-prefill.test.mjs

@@ -1,6 +1,9 @@
 import assert from 'node:assert/strict'
 import test from 'node:test'
 
+import {
+  ASSISTANT_SCOPE_ACTION_FILL_COMPOSER
+} from '../src/utils/assistantSessionScope.js'
 import {
   mergeComposerPrefill,
   resolveSuggestedActionPrefill
@@ -41,3 +44,23 @@ test('composer prefill appends to existing draft without duplication', () => {
   assert.equal(mergeComposerPrefill('地点：上海', '事由：'), '地点：上海\n事由：')
   assert.equal(mergeComposerPrefill('地点：上海\n事由：', '事由：'), '地点：上海\n事由：')
 })
+
+test('fill_composer action resolves payload.fill_text as prefill', () => {
+  assert.equal(
+    resolveSuggestedActionPrefill({
+      action_type: ASSISTANT_SCOPE_ACTION_FILL_COMPOSER,
+      payload: { fill_text: '我想要申请明天去北京出差3天' }
+    }),
+    '我想要申请明天去北京出差3天'
+  )
+})
+
+test('fill_composer action without fill_text falls back to empty (no application_field lookup)', () => {
+  assert.equal(
+    resolveSuggestedActionPrefill({
+      action_type: ASSISTANT_SCOPE_ACTION_FILL_COMPOSER,
+      payload: {}
+    }),
+    ''
+  )
+})