Close the web-feasible 100% gaps: REST write/token API, tickets, draw-badge, /me, sanitisation, dusk, radio SSE

Final parity push (web-tier only):
- REST API write + token auth: POST /api/tokens (issue a personal_access_token
  for the session user), Bearer auth via src/lib/api-auth.ts, POST
  /api/articles/[slug]/comment, GET/DELETE /api/me/tokens, full tickets API
  (/api/tickets +[id] +[id]/reply), radio current-dj/points/points-leaderboard/
  embed-config + POST shouts, and a real-time /api/radio/stream (SSE). 31 public
  API routes total.
- Pages: /draw-badge (buy a custom profile badge → credits + RCON), /me
  dashboard (stats + online friends + referral claim). Wired into the nav.
- HTML sanitisation (sanitize-html) — the HTMLPurifier equivalent — applied to
  writeable boxes + article bodies before dangerouslySetInnerHTML.
- "Dusk" dark theme preset + a default-dark site option honoured by the
  no-flash boot script.

Verified live (prod, amx_test): token issue → Bearer endpoint 200, no-token
401; /api/me/tokens lists it; current-dj/leaderboard JSON; /me + /draw-badge
200; reverted the test user + tokens. tsc 0, vitest 49/49, next build 0.

src/app/api/tickets/[id]/route.ts

@@ -0,0 +1,76 @@
+// Public REST API — a single help-center ticket (with replies).
+//
+// Bearer-authed. GET returns one ticket that MUST belong to the authed user,
+// together with its replies; reply author usernames are resolved in a single
+// users lookup. Fail-soft: never a 500.
+
+import { apiError, apiJson } from "@/lib/api";
+import { bearerUserId } from "@/lib/api-auth";
+import { prisma } from "@/lib/prisma";
+
+export const dynamic = "force-dynamic";
+
+// GET /api/tickets/:id
+export async function GET(req: Request, { params }: { params: Promise<{ id: string }> }) {
+  const uid = await bearerUserId(req);
+  if (!uid) return apiError("Unauthorized", 401);
+
+  const { id } = await params;
+  if (!/^\d+$/.test(id)) return apiError("Invalid ticket id");
+  const ticketId = BigInt(id);
+
+  try {
+    const ticket = await prisma.websiteHelpCenterTickets.findUnique({
+      where: { id: ticketId },
+      select: {
+        id: true,
+        userId: true,
+        categoryId: true,
+        title: true,
+        content: true,
+        open: true,
+        createdAt: true,
+      },
+    });
+
+    // Ownership check — return 404 (not 403) so a foreign id is indistinguishable
+    // from a missing one.
+    if (!ticket || ticket.userId !== uid) return apiError("Ticket not found", 404);
+
+    const replies = await prisma.websiteHelpCenterTicketReplies.findMany({
+      where: { ticketId },
+      select: { id: true, userId: true, content: true, createdAt: true },
+      orderBy: { id: "asc" },
+    });
+
+    // Resolve author usernames in one query.
+    const authorIds = [...new Set(replies.map((r) => r.userId))];
+    const authors = authorIds.length
+      ? await prisma.user.findMany({
+          where: { id: { in: authorIds } },
+          select: { id: true, username: true },
+        })
+      : [];
+    const nameById = new Map(authors.map((a) => [a.id, a.username]));
+
+    return apiJson({
+      ticket: {
+        id: ticket.id,
+        categoryId: ticket.categoryId,
+        title: ticket.title,
+        content: ticket.content,
+        open: ticket.open,
+        createdAt: ticket.createdAt,
+        replies: replies.map((r) => ({
+          id: r.id,
+          userId: r.userId,
+          username: nameById.get(r.userId) ?? null,
+          content: r.content,
+          createdAt: r.createdAt,
+        })),
+      },
+    });
+  } catch {
+    return apiError("Failed to load ticket", 503);
+  }
+}