refactor(web): 应用外壳/差旅详情/报销创建视图适配主题与多 task

- AppShellRouteView/useAppShell 适配主题皮肤与会话入口
- TravelRequestDetailView/travelRequestDetailSetup 差旅详情适配，travel-request-detail-view.css 调整
- TravelReimbursementCreateView/useTravelReimbursementCreateViewLifecycle 创建视图适配
- 更新 app-shell-financial-assistant-entry/travel-request-detail-risk-advice 测试

web/tests/app-shell-financial-assistant-entry.test.mjs

@@ -182,10 +182,13 @@ test('application entry keeps its own assistant source without creating a separa
 test('application edit prefill opens assistant without auto submit', () => {
   assert.match(appShellRouteView, /:initial-prompt-auto-submit="smartEntryContext\.initialPromptAutoSubmit"/)
   assert.match(appShellRouteView, /:initial-application-preview="smartEntryContext\.initialApplicationPreview"/)
+  assert.match(appShellRouteView, /:initial-draft-payload="smartEntryContext\.initialDraftPayload"/)
   assert.match(appShellComposable, /initialPromptAutoSubmit:\s*true/)
   assert.match(appShellComposable, /initialApplicationPreview:\s*null/)
+  assert.match(appShellComposable, /initialDraftPayload:\s*null/)
   assert.match(appShellComposable, /initialPromptAutoSubmit:\s*payload\.initialPromptAutoSubmit !== false/)
   assert.match(appShellComposable, /initialApplicationPreview:\s*payload\.applicationPreview && typeof payload\.applicationPreview === 'object'/)
+  assert.match(appShellComposable, /initialDraftPayload:\s*payload\.draftPayload && typeof payload\.draftPayload === 'object'/)
   assert.match(
     assistantScript,
     /initialPromptAutoSubmit:\s*\{[\s\S]*type:\s*Boolean[\s\S]*default:\s*true/
@@ -194,9 +197,13 @@ test('application edit prefill opens assistant without auto submit', () => {
     assistantScript,
     /initialApplicationPreview:\s*\{[\s\S]*type:\s*Object[\s\S]*default:\s*null/
   )
+  assert.match(
+    assistantScript,
+    /initialDraftPayload:\s*\{[\s\S]*type:\s*Object[\s\S]*default:\s*null/
+  )
   assert.match(
     assistantSurface,
-    /props\.initialApplicationPreview[\s\S]*normalizeApplicationPreview\(props\.initialApplicationPreview\)[\s\S]*createMessage\('assistant', buildLocalApplicationPreviewMessage\(applicationPreview\)/
+    /props\.initialApplicationPreview[\s\S]*normalizeApplicationPreview\(props\.initialApplicationPreview\)[\s\S]*const draftPayload = props\.initialDraftPayload[\s\S]*createMessage\('assistant', buildLocalApplicationPreviewMessage\(applicationPreview\)[\s\S]*draftPayload/
   )
   assert.match(assistantSessionStateScript, /&& !props\.initialApplicationPreview/)
   assert.match(