diff --git a/src/App.tsx b/src/App.tsx
index 336c96c..92acf37 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -31,9 +31,9 @@ import {
   Cell,
   LabelList,
 } from 'recharts';
-import type { SummaryData, TypeSummary, VehicleListItem, DeptGroup, RegionGroup, CustomerStats, RegionalInventoryStats } from './types';
-import { fetchSummary, fetchByType, fetchVehicleList, fetchWeeklyDetail, fetchDeptStats, fetchRegionStats, fetchCustomerStats, fetchInventoryStats, fetchRegionChart } from './api';
-import type { WeeklyDetailItem } from './api';
+import type { SummaryData, TypeSummary, VehicleListItem, DeptGroup, RegionGroup, CustomerStats, RegionalInventoryStats } from './modules/assets/types';
+import { fetchSummary, fetchByType, fetchVehicleList, fetchWeeklyDetail, fetchDeptStats, fetchRegionStats, fetchCustomerStats, fetchInventoryStats, fetchRegionChart } from './modules/assets/api';
+import type { WeeklyDetailItem } from './modules/assets/api';
 
 // --- SearchSelect Component ---
 function SearchSelect({ value, onChange, options, placeholder, className }: {
diff --git a/src/api.ts b/src/modules/assets/api.ts
similarity index 100%
rename from src/api.ts
rename to src/modules/assets/api.ts
diff --git a/src/types.ts b/src/modules/assets/types.ts
similarity index 100%
rename from src/types.ts
rename to src/modules/assets/types.ts