[AI] fix some modules, develop the big part of modules. TODO fix critical errors, update pipeline, test everything

frontend/src/api.ts

@@ -47,20 +47,41 @@ export const activateTrial = async () => {
   return res.json();
 };
 
-export const buySubscription = async (plan: string) => {
+
+export const initiatePayment = async (plan: string, provider: string, currency: string) => {
   const token = localStorage.getItem(TOKEN_KEY);
-  // Путь: /api/v1/billing/subscribe
-  const res = await fetch(`${API_BASE}/billing/subscribe`, {
+  if (!token) throw new Error("No token found");
+
+  const res = await fetch(`${API_BASE}/billing/pay/initiate`, {
     method: "POST",
     headers: {
       "Content-Type": "application/json",
       Authorization: `Bearer ${token}`,
     },
-    body: JSON.stringify({ plan }),
+    body: JSON.stringify({ plan, provider, currency }),
   });
+  
   if (!res.ok) {
     const errData = await res.json().catch(() => ({}));
-    throw new Error(errData.error || res.statusText || "Purchase failed");
+    throw new Error(errData.error || "Initiate payment failed");
   }
   return res.json();
 };
+
+export const confirmPayment = async (invoice_id: string, external_tx_id: string) => {
+  const token = localStorage.getItem(TOKEN_KEY);
+  const res = await fetch(`${API_BASE}/billing/pay/confirm`, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+      Authorization: `Bearer ${token}`,
+    },
+    body: JSON.stringify({ invoice_id, external_tx_id }),
+  });
+  
+  if (!res.ok) {
+    const errData = await res.json().catch(() => ({}));
+    throw new Error(errData.error || "Payment verification failed");
+  }
+  return res.json();
+};