fix: 区域运营移动端数据、下钻支持城市/车型、网页标题

- 移动端区域运营改用regionData真实数据（去掉Math.floor模拟）
- 区域/城市/车型行数字全部支持点击下钻
- 后端/list支持按车型大类过滤（如4.5T含普货+冷链）
- 网页标题改为"羚牛氢能车辆资产"

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

src/server/routes/vehicles.ts

@@ -860,8 +860,14 @@ app.get('/list', async (c) => {
   const { batch, model, location, status, category, vehicleType, manager, customer, isColdChain, isTrailer } = c.req.query();
 
   let filtered = vehicles;
-  if (vehicleType && VEHICLE_TYPE_FILTERS[vehicleType]) {
-    filtered = filtered.filter(VEHICLE_TYPE_FILTERS[vehicleType]);
+  if (vehicleType) {
+    if (VEHICLE_TYPE_FILTERS[vehicleType]) {
+      filtered = filtered.filter(VEHICLE_TYPE_FILTERS[vehicleType]);
+    } else if (vehicleType === '4.5T') {
+      filtered = filtered.filter((v) => v.type === '4.5T');
+    } else {
+      filtered = filtered.filter((v) => v.type === vehicleType);
+    }
   }
   if (batch && batch !== 'All') {
     filtered = filtered.filter((v) => (v.contractNo || '未知') === batch);