Payment return decided by the server only; encoded path ids; no sign-out on a two-tab refresh race

- ?orderId must be numeric; every id in an API path is encodeURIComponent'd.
- The payment sheet shows success only from GET /payment/orders/{id}; a failed lookup says the
  status is unknown instead of "paid".
- A 401 from /auth/refresh is not a sign-out when another tab already stored a rotated token.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/api/index.ts

@@ -22,6 +22,9 @@ function saveTokens(data: T.AuthResponse) {
   return data;
 }
 
+/** یک بخشِ مسیر؛ شناسه‌ای که از آدرسِ صفحه یا سرور می‌آید نباید با «/» یا «..» مسیرِ دیگری از API را صدا بزند. */
+const seg = (value: string | number) => encodeURIComponent(String(value));
+
 export const api = {
   auth: {
     isSignedIn: () => Boolean(http.storage.get()?.token),
@@ -85,37 +88,37 @@ export const api = {
 
   /** بدونِ grade، پایه‌ی ذخیره‌شده‌ی خودِ کاربر ملاک است. */
   home: () => http.get<T.HomeResponse>('/home'),
-  nodeLessons: (nodeId: string) => http.get<T.NodeLessons>(`/nodes/${nodeId}/lessons`),
+  nodeLessons: (nodeId: string) => http.get<T.NodeLessons>(`/nodes/${seg(nodeId)}/lessons`),
 
   /**
    * آزمونِ جزیره: از هر درسِ جزیره حداکثر یک سوال (پیش‌فرض ۴). ترتیب برای هر
    * کاربر ثابت است، پس رفرش همان آزمون را می‌دهد.
    */
-  nodeQuiz: (nodeId: string) => http.get<T.NodeQuiz>(`/nodes/${nodeId}/quiz`),
+  nodeQuiz: (nodeId: string) => http.get<T.NodeQuiz>(`/nodes/${seg(nodeId)}/quiz`),
   /** پایانِ آزمون، جزیره را با هر نمره‌ای تمام می‌کند و جزیره‌ی بعدی را باز. */
   nodeQuizComplete: (nodeId: string, result: { correctCount: number; totalQuestions: number }, idempotencyKey?: string) =>
-    http.create<T.NodeQuizComplete>(`/nodes/${nodeId}/quiz/complete`, result, { idempotencyKey }),
+    http.create<T.NodeQuizComplete>(`/nodes/${seg(nodeId)}/quiz/complete`, result, { idempotencyKey }),
 
   lesson: {
-    intro: (lessonId: number) => http.get<T.LessonIntro>(`/lessons/${lessonId}/intro`),
+    intro: (lessonId: number) => http.get<T.LessonIntro>(`/lessons/${seg(lessonId)}/intro`),
     questions: (lessonId: number) =>
-      http.get<{ questions: T.Question[] }>(`/lessons/${lessonId}/questions`).then((r) => r.questions),
+      http.get<{ questions: T.Question[] }>(`/lessons/${seg(lessonId)}/questions`).then((r) => r.questions),
     /**
      * کلیدِ یکتا را یک‌بار برای هر جواب بسازید و در تکرار همان را بفرستید تا
      * امتیاز و قلب دوبار حساب نشود.
      */
     answer: (questionId: string, selectedOptionId: string, idempotencyKey = newIdempotencyKey()) =>
       http.post<T.AnswerResult>(
-        `/questions/${questionId}/answer`,
+        `/questions/${seg(questionId)}/answer`,
         { selectedOptionId: Number(selectedOptionId) },
         { idempotencyKey, retry: true },
       ),
     /** مجموعِ XP و سکه‌ی کاربر اینجا به‌روز می‌شود، نه سرِ هر جواب. */
     complete: (lessonId: number, result: { correctCount: number; totalQuestions: number }, idempotencyKey?: string) =>
-      http.create<T.LessonComplete>(`/lessons/${lessonId}/complete`, result, { idempotencyKey }),
+      http.create<T.LessonComplete>(`/lessons/${seg(lessonId)}/complete`, result, { idempotencyKey }),
     report: (questionId: string, reason: T.ReportReason, note?: string) =>
       http.post<{ success: boolean; reportId: number; alreadyReported: boolean }>(
-        `/questions/${questionId}/report`,
+        `/questions/${seg(questionId)}/report`,
         { reason, ...(note ? { note } : {}) },
       ),
   },
@@ -157,19 +160,19 @@ export const api = {
       return done;
     },
     feedback: (messageId: string, isHelpful: boolean, reason?: string) =>
-      http.post<{ success: boolean }>(`/ai/messages/${messageId}/feedback`, {
+      http.post<{ success: boolean }>(`/ai/messages/${seg(messageId)}/feedback`, {
         isHelpful,
         ...(reason ? { reason } : {}),
       }),
     history: (conversationId: string) =>
       http.get<{ conversationId: string; lessonId: string | null; messages: T.ConversationMessage[] }>(
-        `/ai/conversations/${conversationId}/messages`,
+        `/ai/conversations/${seg(conversationId)}/messages`,
       ),
   },
 
   notifications: {
     list: () => http.get<{ items: T.NotificationItem[]; unreadCount: number }>('/notifications'),
-    markRead: (id: number) => http.patch(`/notifications/${id}/read`),
+    markRead: (id: number) => http.patch(`/notifications/${seg(id)}/read`),
     markAllRead: () => http.patch('/notifications/read-all'),
   },
 
@@ -190,7 +193,7 @@ export const api = {
     /** کدِ تخفیف باید پیش از رفتن به درگاه ثبت شود؛ هر سفارش فقط یک کد. */
     redeem: (code: string, orderId: string) =>
       http.post<T.RedeemResponse>('/discount/redeem', { code, orderId }),
-    order: (orderId: string) => http.get<T.OrderStatus>(`/payment/orders/${orderId}`),
+    order: (orderId: string) => http.get<T.OrderStatus>(`/payment/orders/${seg(orderId)}`),
     /** پرداخت‌ها و فاکتورهای همین کاربر، تازه‌ترین اول. */
     invoices: () => http.get<{ invoices: T.Invoice[] }>('/payment/invoices').then((r) => r.invoices),
   },
@@ -200,9 +203,9 @@ export const api = {
       http.create<{ ticketId: string; status: string }>('/support/tickets', { subject, category }),
     /** تیکت‌های همین کاربر، تازه‌ترین اول (۲۰ تای آخر). */
     tickets: () => http.get<{ tickets: T.TicketSummary[] }>('/support/tickets').then((r) => r.tickets),
-    ticket: (ticketId: string) => http.get<T.Ticket>(`/support/tickets/${ticketId}`),
+    ticket: (ticketId: string) => http.get<T.Ticket>(`/support/tickets/${seg(ticketId)}`),
     reply: (ticketId: string, text: string) =>
-      http.create<{ messageId: string; success: boolean }>(`/support/tickets/${ticketId}/messages`, { text }),
+      http.create<{ messageId: string; success: boolean }>(`/support/tickets/${seg(ticketId)}/messages`, { text }),
     bugReport: (title: string, description: string) =>
       http.create<{ bugReportId: string; status: string }>('/support/bug-reports', { title, description }),
   },