Accept buyer phone in grant API and enrich existing users

payment-router now forwards name/phone from the order. Store phone on
create; for existing users fill name (when it is an email placeholder)
and phone (when empty) without overwriting meaningful data. Also stop
dropping the parsed phone column in CSV import.

docker-compose.prod.yml

@@ -23,14 +23,18 @@ services:
         condition: service_started
 
   db:
-    image: postgres:16-alpine
+    # ⚠️ PG18 сменил раскладку: том монтируется в /var/lib/postgresql (НЕ .../data),
+    # кластер лежит в подкаталоге 18/docker. Мажор прода сделан 09.07.2026.
+    # Не откатывать тег и mount по отдельности — иначе initdb на непустом томе → рестарт-луп.
+    # В этом каталоге на Hetzner том lms-sb_postgres_data = hot-standby (тоже PG18).
+    image: postgres:18-alpine
     restart: unless-stopped
     environment:
       POSTGRES_USER: lms_user
       POSTGRES_PASSWORD: "${DB_PASSWORD}"
       POSTGRES_DB: lms_db
     volumes:
-      - postgres_data:/var/lib/postgresql/data
+      - postgres_data:/var/lib/postgresql
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U lms_user -d lms_db"]
       interval: 5s

src/app/(student)/courses/[slug]/lessons/[lessonId]/page.tsx

@@ -149,9 +149,8 @@ export default async function LessonPage({ params }: Props) {
             {lesson.files.map((file) => (
               <a
                 key={file.id}
-                href={file.url}
-                target="_blank"
-                rel="noopener noreferrer"
+                href={`/api/lesson-files/${file.id}/download`}
+                download={file.name}
                 className="flex items-center gap-3 px-4 py-3 text-sm transition-colors hover:[border-color:var(--foreground)]"
                 style={{ border: "2px solid var(--border)" }}
               >

src/app/admin/import-export/import-actions.ts

@@ -200,6 +200,7 @@ export async function applyImport(
           data: {
             name: row.name,
             email: row.email,
+            phone: row.phone || null,
             emailVerified: options.autoVerifyEmail,
             role: "student",
           },
@@ -231,10 +232,16 @@ export async function applyImport(
 
         created++;
       } else if (row.status === "update" && row.existingId) {
+        const existing = await prisma.user.findUnique({
+          where: { id: row.existingId },
+          select: { phone: true },
+        });
         await prisma.user.update({
           where: { id: row.existingId },
           data: {
             name: row.name || undefined,
+            // don't overwrite an already-filled phone
+            phone: existing?.phone ? undefined : row.phone || undefined,
           },
         });
 

src/app/api/internal/grant/route.ts

@@ -19,6 +19,7 @@ export async function POST(request: NextRequest) {
   let body: {
     email?: string;
     name?: string;
+    phone?: string;
     course_slugs?: string[];
     order_id?: string;
   };
@@ -30,6 +31,7 @@ export async function POST(request: NextRequest) {
 
   const email = (body.email ?? "").trim().toLowerCase();
   const name = (body.name ?? "").trim();
+  const phone = (body.phone ?? "").trim().slice(0, 30);
   const slugs = Array.isArray(body.course_slugs)
     ? body.course_slugs.filter((s) => typeof s === "string" && s.trim())
     : [];
@@ -66,7 +68,7 @@ export async function POST(request: NextRequest) {
   // Find or create user
   let user = await prisma.user.findFirst({
     where: { email: { equals: email, mode: "insensitive" } },
-    select: { id: true, name: true },
+    select: { id: true, name: true, email: true, phone: true },
   });
   let tempPassword: string | null = null;
   if (!user) {
@@ -76,14 +78,25 @@ export async function POST(request: NextRequest) {
       data: {
         email,
         name: name || email,
+        phone: phone || null,
         emailVerified: true,
         mustChangePassword: true,
         accounts: {
           create: { accountId: email, providerId: "credential", password: hash },
         },
       },
-      select: { id: true, name: true },
+      select: { id: true, name: true, email: true, phone: true },
     });
+  } else {
+    // Enrich existing user from the order, never overwriting meaningful data:
+    // name only if the current one is empty or an email placeholder, phone only if empty.
+    const enrich: { name?: string; phone?: string } = {};
+    if (name && (!user.name || user.name === user.email)) enrich.name = name;
+    if (phone && !user.phone) enrich.phone = phone;
+    if (Object.keys(enrich).length > 0) {
+      await prisma.user.update({ where: { id: user.id }, data: enrich });
+      if (enrich.name) user.name = enrich.name;
+    }
   }
 
   // Enroll + audit log

src/app/api/lesson-files/[id]/download/route.ts

@@ -0,0 +1,117 @@
+import { NextRequest, NextResponse } from "next/server";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+
+// Streams a lesson material from the CDN with a forced attachment header and a
+// human-readable filename. Direct CDN links open the PDF inline in a new tab
+// (no Content-Disposition), which reads as "can't download" for users with a
+// popup blocker or on mobile. This route makes the browser save the file.
+
+const CONTENT_TYPES: Record<string, string> = {
+  pdf: "application/pdf",
+  zip: "application/zip",
+  doc: "application/msword",
+  docx: "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+  ppt: "application/vnd.ms-powerpoint",
+  pptx: "application/vnd.openxmlformats-officedocument.presentationml.presentation",
+  xls: "application/vnd.ms-excel",
+  xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+  png: "image/png",
+  jpg: "image/jpeg",
+  jpeg: "image/jpeg",
+  webp: "image/webp",
+};
+
+function extFromUrl(url: string): string {
+  const clean = url.split("?")[0];
+  const dot = clean.lastIndexOf(".");
+  return dot >= 0 ? clean.slice(dot + 1).toLowerCase() : "";
+}
+
+// Types a browser renders inline (so the direct link "opens in a tab" instead of
+// downloading). Only these need proxying with a forced attachment header. ZIP,
+// DOCX, etc. already download natively → redirect straight to the CDN.
+const INLINE_EXT = new Set([
+  "pdf", "png", "jpg", "jpeg", "webp", "gif", "svg", "avif",
+  "txt", "htm", "html", "mp4", "mov", "webm", "mp3", "wav",
+]);
+// Above this, don't proxy through the app — redirect so the file streams from
+// the CDN/Caddy with Range support (e.g. the 157 MB Second Brain Vault archive).
+const PROXY_MAX_BYTES = 50 * 1024 * 1024;
+
+export async function GET(
+  _req: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) {
+    return NextResponse.json({ error: "unauthorized" }, { status: 401 });
+  }
+
+  const { id } = await params;
+  const file = await prisma.lessonFile.findUnique({
+    where: { id },
+    include: { lesson: { include: { module: { select: { courseId: true } } } } },
+  });
+  if (!file) {
+    return NextResponse.json({ error: "not_found" }, { status: 404 });
+  }
+
+  // Access: staff always; students must be enrolled in the file's course.
+  const role = session.user.role;
+  if (role !== "admin" && role !== "curator") {
+    const enrollment = await prisma.courseEnrollment.findFirst({
+      where: { userId: session.user.id, courseId: file.lesson.module.courseId },
+      select: { userId: true },
+    });
+    if (!enrollment) {
+      return NextResponse.json({ error: "forbidden" }, { status: 403 });
+    }
+  }
+
+  const ext = extFromUrl(file.url);
+
+  // Non-inline types download natively — send the browser straight to the CDN
+  // (native download, Range/resume, no app load). Auth is already enforced above.
+  if (!INLINE_EXT.has(ext)) {
+    return NextResponse.redirect(file.url, 302);
+  }
+
+  const upstream = await fetch(file.url);
+  if (!upstream.ok || !upstream.body) {
+    return NextResponse.json({ error: "file_unavailable" }, { status: 502 });
+  }
+
+  // Guard: a very large inline file still shouldn't stream through the app.
+  const upstreamLen = Number(upstream.headers.get("content-length") ?? "0");
+  if (upstreamLen > PROXY_MAX_BYTES) {
+    await upstream.body.cancel();
+    return NextResponse.redirect(file.url, 302);
+  }
+
+  const contentType =
+    upstream.headers.get("content-type") ??
+    CONTENT_TYPES[ext] ??
+    "application/octet-stream";
+
+  // Build a readable filename: "<name>.<ext>" (avoid doubling the extension).
+  let downloadName = file.name.trim();
+  if (ext && !downloadName.toLowerCase().endsWith(`.${ext}`)) {
+    downloadName += `.${ext}`;
+  }
+  const asciiName = downloadName.replace(/[^\x20-\x7E]+/g, "_").replace(/"/g, "");
+  const disposition =
+    `attachment; filename="${asciiName}"; ` +
+    `filename*=UTF-8''${encodeURIComponent(downloadName)}`;
+
+  const respHeaders: Record<string, string> = {
+    "Content-Type": contentType,
+    "Content-Disposition": disposition,
+    "Cache-Control": "private, no-store",
+  };
+  const len = upstream.headers.get("content-length");
+  if (len) respHeaders["Content-Length"] = len;
+
+  return new NextResponse(upstream.body, { status: 200, headers: respHeaders });
+}