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/components/travel/TravelReimbursementMessageItem.vue

@@ -10,11 +10,43 @@
       />
     </span>
 
-    <div class="message-bubble" :class="ui.buildMessageBubbleClass(message)">
+    <div class="message-stack">
+      <details
+        v-if="message.role === 'assistant' && message.stewardPlan && (message.stewardPlan.streamStatus === 'streaming' || message.stewardPlan.thinkingEvents?.length)"
+        class="steward-intent-bubble"
+        :open="message.stewardPlan.streamStatus === 'streaming'"
+        aria-label="小财管家意图识别智能体"
+      >
+        <summary>
+          <span>
+            <i class="mdi mdi-brain"></i>
+            意图识别智能体
+          </span>
+          <small>{{ message.stewardPlan.streamStatus === 'streaming' ? '识别中' : `${message.stewardPlan.thinkingEvents?.length || 0} 步` }}</small>
+          <i class="mdi mdi-chevron-down"></i>
+        </summary>
+        <ol v-if="message.stewardPlan.thinkingEvents?.length" class="steward-intent-event-list">
+          <li
+            v-for="event in (message.stewardPlan.thinkingEvents || []).slice(0, message.stewardPlan.visibleThinkingEventCount || message.stewardPlan.thinkingEvents?.length || 0)"
+            :key="`${message.id}-${event.eventId}`"
+          >
+            <strong>{{ event.title }}</strong>
+            <span>{{ event.content }}</span>
+          </li>
+        </ol>
+        <p v-else class="steward-intent-empty">正在建立任务上下文...</p>
+      </details>
+
+    <div
+      v-if="!message.stewardPlan || message.stewardPlan.streamStatus !== 'streaming' || message.text"
+      class="message-bubble"
+      :class="ui.buildMessageBubbleClass(message)"
+    >
     <header class="message-meta">
       <strong>{{ message.role === 'assistant' ? (message.assistantName || ui.ASSISTANT_DISPLAY_NAME) : '我' }}</strong>
       <time>{{ message.time }}</time>
     </header>
+
     <div
       v-if="message.text && message.role === 'assistant' && message.reviewPayload && ui.buildReviewMainMessageText(message)"
       class="review-summary message-answer-content message-answer-markdown"
@@ -40,6 +72,59 @@
       :report="message.budgetReport"
     />
 
+    <div
+      v-if="message.role === 'assistant' && message.stewardPlan && message.stewardPlan.streamStatus !== 'streaming'"
+      class="steward-plan-block"
+      role="group"
+      aria-label="小财管家任务计划"
+    >
+      <div v-if="message.stewardPlan.tasks?.length" class="steward-task-list">
+        <article
+          v-for="task in message.stewardPlan.tasks"
+          :key="`${message.id}-${task.taskId}`"
+          class="steward-task-card"
+        >
+          <header>
+            <span>{{ task.taskTypeLabel }}</span>
+            <small>{{ task.assignedAgentLabel }}</small>
+          </header>
+          <strong>{{ task.title }}</strong>
+          <p>{{ task.summary }}</p>
+          <div class="steward-task-meta">
+            <span>置信度 {{ Math.round((task.confidence || 0) * 100) }}%</span>
+            <span v-if="task.missingFields?.length">待补充 {{ task.missingFields.join('、') }}</span>
+            <span v-else>字段已齐备</span>
+          </div>
+        </article>
+      </div>
+
+      <div v-if="message.stewardPlan.attachmentGroups?.length" class="steward-attachment-list">
+        <article
+          v-for="group in message.stewardPlan.attachmentGroups"
+          :key="`${message.id}-${group.groupId}`"
+          class="steward-attachment-card"
+        >
+          <header>
+            <span>{{ group.sceneLabel }}</span>
+            <small>{{ Math.round((group.confidence || 0) * 100) }}%</small>
+          </header>
+          <p>{{ group.rationale }}</p>
+          <div class="steward-attachment-chip-row">
+            <span
+              v-for="name in group.attachmentNames"
+              :key="`${group.groupId}-in-${name}`"
+              class="steward-attachment-chip include"
+            >{{ name }}</span>
+            <span
+              v-for="name in group.excludedAttachmentNames"
+              :key="`${group.groupId}-out-${name}`"
+              class="steward-attachment-chip exclude"
+            >排除：{{ name }}</span>
+          </div>
+        </article>
+      </div>
+    </div>
+
     <div
       v-if="message.role === 'assistant' && message.applicationPreview"
       class="application-preview-table"
@@ -472,6 +557,7 @@
       </span>
     </div>
     </div>
+    </div>
 
     <div
       v-if="ui.isOperationFeedbackVisible(message)"