Add directly purchased cars to My Requests page

- Add new /my-vehicles API endpoint returning both recommended and direct purchases
- Add DirectPurchasedCarResponse and MyVehiclesResponse schemas
- Update frontend to display directly purchased cars (from banners with 1CC)
- Show separate collapsible section for direct purchases

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/lib/api.ts

@@ -630,6 +630,21 @@ export interface VehicleRequestWithVehicles {
   approved_vehicles: RequestVehicle[];
 }
 
+// Directly purchased car (from banner with 1CC)
+export interface DirectPurchasedCar {
+  id: number;
+  car_id: number;
+  car_data: Record<string, any>;
+  cc_paid: number;
+  purchased_at: string;
+}
+
+// Full response including both recommended and directly purchased cars
+export interface MyVehiclesResponse {
+  vehicle_requests: VehicleRequestWithVehicles[];
+  direct_purchases: DirectPurchasedCar[];
+}
+
 export const vehicleRequestsApi = {
   // User endpoints
   createRequest: async (requestData: {
@@ -656,6 +671,12 @@ export const vehicleRequestsApi = {
     return data;
   },
 
+  // Get all vehicles: recommended + directly purchased from banners
+  getMyVehicles: async (): Promise<MyVehiclesResponse> => {
+    const { data } = await api.get('/vehicle-requests/my-vehicles');
+    return data;
+  },
+
   getPurchasedVehicles: async (): Promise<PurchasedVehicle[]> => {
     const { data } = await api.get('/vehicle-requests/purchased');
     return data;