feat: 优化差旅报销预审流程与个人工作台 UI 体系

- 完善 user_agent_application 申请差旅报销预审槽位与消息组装
- 增强预算助理报告与风险建议卡片交互
- 重构登录页视觉样式与移动端响应式适配
- 优化个人工作台、文档中心、政策中心、员工管理等页面布局
- 拆分 travelRequestDetailPreReviewModel 为 advice/submit 模型
- 补充报销草稿、风险复核、Item Sync 与模板执行器测试覆盖

web/src/views/TravelRequestDetailView.vue

@@ -162,7 +162,12 @@
                   <span><i class="mdi mdi-account-tie-outline"></i>领导意见</span>
                   <strong v-if="leaderApprovalReadonlyMeta">{{ leaderApprovalReadonlyMeta }}</strong>
                 </div>
-                <div v-if="hasLeaderApprovalEvents" class="application-leader-opinion-timeline" aria-label="领导批复事件流">
+                <div
+                  v-if="hasLeaderApprovalEvents"
+                  class="application-leader-opinion-timeline"
+                  :class="{ 'is-single': hasSingleLeaderApprovalEvent }"
+                  aria-label="领导批复事件流"
+                >
                   <article
                     v-for="event in leaderApprovalEvents"
                     :key="event.id"
@@ -414,7 +419,7 @@
               <div class="validation-head">
                 <div>
                   <h3>{{ aiAdviceTitle }}</h3>
-                  <p>{{ aiAdviceHint }}</p>
+                  <p v-if="aiAdviceHint">{{ aiAdviceHint }}</p>
                 </div>
                 <span :class="['validation-pill', aiAdvice.tone]">{{ aiAdvice.badge }}</span>
               </div>
@@ -426,7 +431,7 @@
                   :class="['validation-section', `validation-section--${section.kind}`]"
                 >
                   <h4 class="validation-section-title">{{ section.title }}</h4>
-                  <ul v-if="section.kind === 'completion'" class="validation-list">
+                  <ul v-if="section.kind !== 'risk'" class="validation-list">
                     <li v-for="item in section.items" :key="item">{{ item }}</li>
                   </ul>
                   <div v-else class="risk-advice-list">
@@ -451,10 +456,6 @@
                 </section>
               </div>
             </article>
-            <RiskObservationEvidenceCard
-              v-if="request.claimId"
-              :claim-id="request.claimId"
-            />
             <StageRiskAdviceCard
               v-if="showStageRiskAdvice"
               :request="request"
@@ -687,7 +688,7 @@
       badge="重大风险"
       badge-tone="danger"
       :title="`当前存在 ${submitRiskWarnings.length} 条重大风险`"
-      description="如仍需进入下一步，请逐条填写每一个重大风险的原因，系统会写入附加说明并用于后续风险统计。"
+      description="如仍需提交审批，请逐条填写每一个重大风险的原因，系统会写入附加说明并用于后续风险统计。"
       cancel-text="返回整改"
       confirm-text="保存原因并继续"
       busy-text="保存中..."