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/views/scripts/useTravelReimbursementSessionState.js

@@ -16,6 +16,7 @@ import {
   SESSION_TYPE_APPLICATION,
   SESSION_TYPE_BUDGET,
   SESSION_TYPE_EXPENSE,
+  SESSION_TYPE_STEWARD,
   buildInitialInsightFromConversation,
   buildWelcomeInsight,
   buildWelcomeQuickActions,
@@ -35,6 +36,15 @@ import {
   normalizeGuidedFlowState
 } from './travelReimbursementGuidedFlowModel.js'
 
+const STEWARD_IDLE_INSIGHT = {
+  intent: 'idle',
+  metricLabel: '',
+  metricValue: '',
+  title: '',
+  summary: '',
+  agent: null
+}
+
 export function useTravelReimbursementSessionState({
   props,
   currentUser,
@@ -79,6 +89,9 @@ export function useTravelReimbursementSessionState({
     if (!Array.isArray(messages) || !messages.length) {
       return []
     }
+    if (isStewardSessionType(sessionType)) {
+      return messages.filter((message) => !message?.isWelcome)
+    }
     const currentActions = buildWelcomeQuickActions(
       sessionType,
       currentUser.value,
@@ -92,6 +105,27 @@ export function useTravelReimbursementSessionState({
     ))
   }
 
+  function isStewardSessionType(sessionType) {
+    return normalizeAssistantSessionType(sessionType) === SESSION_TYPE_STEWARD
+  }
+
+  function buildSessionMessages(restoredMessages, sessionType) {
+    if (Array.isArray(restoredMessages) && restoredMessages.length) {
+      return restoredMessages
+    }
+    if (isStewardSessionType(sessionType)) {
+      return []
+    }
+    return [createWelcomeAssistantMessage(props.entrySource, linkedRequest.value, sessionType, currentUser.value)]
+  }
+
+  function buildSessionInsight(sessionType) {
+    if (isStewardSessionType(sessionType)) {
+      return { ...STEWARD_IDLE_INSIGHT }
+    }
+    return buildWelcomeInsight(props.entrySource, linkedRequest.value, sessionType, currentUser.value)
+  }
+
   function buildConversationSessionState(conversation, fallbackSessionType = resolveDefaultSessionTypeFromEntry()) {
     const sessionType = resolveAccessibleSessionType(
       resolveInitialSessionType(conversation, fallbackSessionType),
@@ -103,13 +137,12 @@ export function useTravelReimbursementSessionState({
 
     return {
       sessionType,
-      messages: restoredMessages.length
-        ? restoredMessages
-        : [createWelcomeAssistantMessage(props.entrySource, linkedRequest.value, sessionType, currentUser.value)],
+      messages: buildSessionMessages(restoredMessages, sessionType),
       conversationId: resolveInitialConversationId(conversation),
       draftClaimId: resolveInitialDraftClaimId(conversation),
-      currentInsight:
-        initialInsight || buildWelcomeInsight(props.entrySource, linkedRequest.value, sessionType, currentUser.value),
+      currentInsight: isStewardSessionType(sessionType)
+        ? buildSessionInsight(sessionType)
+        : initialInsight || buildSessionInsight(sessionType),
       reviewFilePreviews: restoredReviewFilePreviews,
       composerDraft: '',
       attachedFiles: [],
@@ -127,17 +160,10 @@ export function useTravelReimbursementSessionState({
     )
     return {
       sessionType: normalizedSessionType,
-      messages: [
-        createWelcomeAssistantMessage(props.entrySource, linkedRequest.value, normalizedSessionType, currentUser.value)
-      ],
+      messages: buildSessionMessages([], normalizedSessionType),
       conversationId: '',
       draftClaimId: '',
-      currentInsight: buildWelcomeInsight(
-        props.entrySource,
-        linkedRequest.value,
-        normalizedSessionType,
-        currentUser.value
-      ),
+      currentInsight: buildSessionInsight(normalizedSessionType),
       reviewFilePreviews: [],
       composerDraft: '',
       attachedFiles: [],
@@ -169,14 +195,12 @@ export function useTravelReimbursementSessionState({
 
     return {
       sessionType,
-      messages: restoredMessages.length
-        ? restoredMessages
-        : [createWelcomeAssistantMessage(props.entrySource, linkedRequest.value, sessionType, currentUser.value)],
+      messages: buildSessionMessages(restoredMessages, sessionType),
       conversationId: String(state.conversationId || '').trim(),
       draftClaimId: String(state.draftClaimId || '').trim(),
-      currentInsight:
-        state.currentInsight
-        || buildWelcomeInsight(props.entrySource, linkedRequest.value, sessionType, currentUser.value),
+      currentInsight: isStewardSessionType(sessionType)
+        ? buildSessionInsight(sessionType)
+        : state.currentInsight || buildSessionInsight(sessionType),
       reviewFilePreviews: filterPersistableFilePreviews(state.reviewFilePreviews),
       composerDraft: String(state.composerDraft || ''),
       attachedFiles: [],
@@ -301,26 +325,15 @@ export function useTravelReimbursementSessionState({
       nextState.sessionType,
       resolveDefaultSessionTypeFromEntry()
     )
-    messages.value = Array.isArray(nextState.messages) && nextState.messages.length
-      ? nextState.messages
-      : [
-          createWelcomeAssistantMessage(
-            props.entrySource,
-            linkedRequest.value,
-            activeSessionType.value,
-            currentUser.value
-          )
-        ]
+    messages.value = buildSessionMessages(
+      refreshWelcomeQuickActions(nextState.messages, activeSessionType.value),
+      activeSessionType.value
+    )
     conversationId.value = String(nextState.conversationId || '').trim()
     draftClaimId.value = String(nextState.draftClaimId || '').trim()
-    currentInsight.value =
-      nextState.currentInsight
-      || buildWelcomeInsight(
-        props.entrySource,
-        linkedRequest.value,
-        activeSessionType.value,
-        currentUser.value
-      )
+    currentInsight.value = isStewardSessionType(activeSessionType.value)
+      ? buildSessionInsight(activeSessionType.value)
+      : nextState.currentInsight || buildSessionInsight(activeSessionType.value)
     reviewFilePreviews.value = Array.isArray(nextState.reviewFilePreviews) ? nextState.reviewFilePreviews : []
     composerDraft.value = String(nextState.composerDraft || '')
     if (runtimeRefs.attachedFiles) {