feat: 添加 UI 状态管理，支持新增记录底部弹窗功能，优化设置和主页交互

src/App.vue

@@ -2,9 +2,12 @@
 import { onMounted } from 'vue'
 import { RouterView } from 'vue-router'
 import BottomDock from './components/BottomDock.vue'
+import AddEntryView from './views/AddEntryView.vue'
 import { useTransactionStore } from './stores/transactions'
+import { useUiStore } from './stores/ui'
 
 const transactionStore = useTransactionStore()
+const uiStore = useUiStore()
 
 onMounted(() => {
   transactionStore.ensureInitialized()
@@ -25,6 +28,9 @@ onMounted(() => {
 
       <!-- 底部 Dock 导航 -->
       <BottomDock />
+
+      <!-- 新增记录底部弹窗：在任意 Tab 上浮层显示 -->
+      <AddEntryView v-if="uiStore.addEntryVisible" />
     </div>
   </div>
 </template>