Витрина: телефон в заказе обязателен, предзаполнен из профиля

payment-router с 20261111 требует телефон (слово владельца: писать
покупателю в Telegram, если оплата не прошла). Поле видимое, обязательное,
подставляется User.phone, если есть.

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

src/app/(student)/dashboard/page.tsx

@@ -14,7 +14,7 @@ export default async function StudentDashboard() {
 
   const dbUser = await prisma.user.findUnique({
     where: { id: session.user.id },
-    select: { archetype: true },
+    select: { archetype: true, phone: true },
   });
 
   const enrollments = await prisma.courseEnrollment.findMany({
@@ -168,7 +168,7 @@ export default async function StudentDashboard() {
       {locked.length > 0 && (
         <StoreShowcase
           courses={locked}
-          buyer={{ name: session.user.name, email: session.user.email }}
+          buyer={{ name: session.user.name, email: session.user.email, phone: dbUser?.phone }}
         />
       )}
 

src/components/student/store-checkout-modal.tsx

@@ -30,7 +30,7 @@ interface PayMethod {
 interface Props {
   course: LockedCourse;
   entry: StoreCatalogEntry;
-  buyer: { name: string; email: string };
+  buyer: { name: string; email: string; phone?: string | null };
   onClose: () => void;
 }
 
@@ -257,6 +257,34 @@ export function StoreCheckoutModal({ course, entry, buyer, onClose }: Props) {
             </div>
           )}
 
+          {/* Phone — required by payment-router since 20261111 (owner messages buyers in Telegram) */}
+          <div className="mb-4">
+            <label
+              className={labelClass}
+              style={{ color: "var(--muted-foreground)" }}
+              htmlFor={`${titleId}-phone`}
+            >
+              Телефон
+            </label>
+            <input
+              id={`${titleId}-phone`}
+              type="tel"
+              name="phone"
+              required
+              maxLength={30}
+              autoComplete="tel"
+              inputMode="tel"
+              defaultValue={buyer.phone ?? ""}
+              placeholder="+7 900 000-00-00"
+              style={inputStyle}
+              onFocus={(e) => (e.currentTarget.style.borderColor = "var(--foreground)")}
+              onBlur={(e) => (e.currentTarget.style.borderColor = "var(--border)")}
+            />
+            <p className="text-xs mt-1" style={{ color: "var(--muted-foreground)" }}>
+              Напишу в Telegram, если с оплатой что-то пойдёт не так.
+            </p>
+          </div>
+
           {/* Promo code */}
           <div className="mb-4">
             <label

src/components/student/store-showcase.tsx

@@ -6,7 +6,7 @@ import { StoreCheckoutModal, type LockedCourse } from "./store-checkout-modal";
 
 interface Props {
   courses: LockedCourse[];
-  buyer: { name: string; email: string };
+  buyer: { name: string; email: string; phone?: string | null };
 }
 
 // Blurred card body shared by both the modal-trigger button and the