fix: 修正总库存计算，区分在库/待交车/异动状态

- 总库存 = 在库 + 异动（不含待交车）
- 待交车独立展示
- 库 = 纯在库数量
- 异 = 异动数量
- 验证: 运营 + 库存 + 待交 = 总资产

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/server/types.ts

@@ -36,7 +36,7 @@ export interface Vehicle {
   color: string;
   location: string;
   region: string;
-  status: 'Operating' | 'Inventory' | 'Abnormal';
+  status: 'Operating' | 'Inventory' | 'Pending' | 'Abnormal';
   ownership: string;
   rentCompany: string;
   contractNo: string | null;