restructure pages dir

frontend/src/api/stripe.jsx

@@ -14,6 +14,20 @@ export async function createCheckoutSession() {
     return res.json();
 }
 
+export async function verifyCheckoutSession(sessionId) {
+    const headers = await getAuthHeaders();
+    const res = await fetch(`${API_BASE}/stripe/verify-checkout`, {
+        method: "POST",
+        headers: { ...headers, "Content-Type": "application/json" },
+        body: JSON.stringify({ session_id: sessionId }),
+    });
+    if (!res.ok) {
+        const data = await res.json();
+        throw new Error(data.message || "Failed to verify checkout session");
+    }
+    return res.json();
+}
+
 export async function getSubscriptionStatus() {
     const headers = await getAuthHeaders();
     const res = await fetch(`${API_BASE}/stripe/subscription-status`, {