feat: 新增预算费控模型与报销审批流引擎

后端新增预算费控服务和报销单审批流模块，引入申请人费用画像
算法，优化知识库 RAG 运行时和同步逻辑，完善报销单工作流常
量和明细同步，更新差旅报销规则电子表格，前端新增预算分析
组件和数字员工模型，完善审批对话框和洞察面板交互，优化侧
边栏和顶栏样式，补充单元测试。

web/src/components/layout/SidebarRail.vue

@@ -9,33 +9,52 @@
         </svg>
       </div>
       <strong class="brand-name">{{ displayCompanyName }}</strong>
-      <button
-        class="rail-collapse-btn"
-        type="button"
-        :aria-label="collapsed ? '展开侧边栏' : '折叠侧边栏'"
-        :title="collapsed ? '展开侧边栏' : '折叠侧边栏'"
-        :aria-expanded="!collapsed"
-        @click="emit('toggle-collapse')"
+      <ElTooltip
+        :content="collapseTooltipContent"
+        placement="right"
+        effect="light"
+        :show-after="180"
+        :hide-after="0"
+        :offset="12"
+        popper-class="rail-tooltip-popper"
       >
-        <i :class="collapsed ? 'mdi mdi-chevron-right' : 'mdi mdi-chevron-left'"></i>
-      </button>
+        <button
+          class="rail-collapse-btn"
+          type="button"
+          :aria-label="collapseTooltipContent"
+          :aria-expanded="!collapsed"
+          @click="emit('toggle-collapse')"
+        >
+          <i :class="collapsed ? 'mdi mdi-chevron-right' : 'mdi mdi-chevron-left'"></i>
+        </button>
+      </ElTooltip>
     </div>
 
     <nav class="rail-nav" aria-label="功能导航">
-      <button
+      <ElTooltip
         v-for="item in decoratedNavItems"
         :key="item.id"
-        class="nav-btn"
-        :class="{ active: activeView === item.id }"
-        type="button"
-        :title="collapsed ? item.displayLabel : undefined"
-        @click="emit('navigate', item.id)"
+        :content="item.displayLabel"
+        placement="right"
+        effect="light"
+        :disabled="!collapsed"
+        :show-after="180"
+        :hide-after="0"
+        :offset="12"
+        popper-class="rail-tooltip-popper"
       >
-        <span class="nav-icon" v-html="item.icon"></span>
-        <span class="nav-label">{{ item.displayLabel }}</span>
-        <span v-if="item.hasNewMessage" class="nav-unread-dot" aria-hidden="true"></span>
-        <span v-if="item.badge" class="nav-badge">{{ item.badge }}</span>
-      </button>
+        <button
+          class="nav-btn"
+          :class="{ active: activeView === item.id }"
+          type="button"
+          @click="emit('navigate', item.id)"
+        >
+          <span class="nav-icon" v-html="item.icon"></span>
+          <span class="nav-label">{{ item.displayLabel }}</span>
+          <span v-if="item.hasNewMessage" class="nav-unread-dot" aria-hidden="true"></span>
+          <span v-if="item.badge" class="nav-badge">{{ item.badge }}</span>
+        </button>
+      </ElTooltip>
     </nav>
 
     <div
@@ -69,19 +88,31 @@
         </div>
       </Teleport>
 
-      <div class="user-summary" tabindex="0" aria-label="用户信息" :title="collapsed ? displayUser.name : undefined">
-        <span class="user-avatar">{{ displayUser.avatar }}</span>
-        <span class="user-copy">
-          <strong>{{ displayUser.name }}</strong>
-          <span>{{ displayUser.role }}</span>
-        </span>
-        <i class="mdi mdi-chevron-up"></i>
-      </div>
+      <ElTooltip
+        :content="userTooltipContent"
+        placement="top"
+        effect="light"
+        :disabled="!collapsed"
+        :show-after="180"
+        :hide-after="0"
+        :offset="10"
+        popper-class="rail-tooltip-popper"
+      >
+        <div class="user-summary" tabindex="0" :aria-label="userTooltipContent">
+          <span class="user-avatar">{{ displayUser.avatar }}</span>
+          <span class="user-copy">
+            <strong>{{ displayUser.name }}</strong>
+            <span>{{ displayUser.role }}</span>
+          </span>
+          <i class="mdi mdi-chevron-up"></i>
+        </div>
+      </ElTooltip>
     </div>
   </aside>
 </template>
 
 <script setup>
+import { ElTooltip } from 'element-plus'
 import { computed, onBeforeUnmount, onMounted, reactive, ref, watch } from 'vue'
 
 import { useDocumentCenterInbox } from '../../composables/useDocumentCenterInbox.js'
@@ -154,6 +185,8 @@ const displayUser = computed(() => ({
 }))
 
 const displayCompanyName = computed(() => props.companyName || 'X-Financial')
+const collapseTooltipContent = computed(() => (props.collapsed ? '展开侧边栏' : '折叠侧边栏'))
+const userTooltipContent = computed(() => [displayUser.value.name, displayUser.value.role].filter(Boolean).join(' · '))
 
 const userMenuOpen = ref(false)
 let userMenuCloseTimer = null

web/src/components/layout/TopBar.vue

@@ -91,7 +91,7 @@
             class="detail-alert-pill"
             :class="alert.tone"
           >
-            <i class="mdi mdi-alert-circle-outline"></i>
+            <i :class="alert.icon || 'mdi mdi-alert-circle-outline'"></i>
             <span>{{ alert.label }}</span>
           </span>
         </div>