Make imager URL absolute using NEXT_PUBLIC_APP_URL to avoid port issues

src/lib/imager.ts

@@ -10,8 +10,14 @@ export type { AvatarOptions } from "@/types/admin";
 
 import type { AvatarOptions } from "@/types/admin";
 
-/** Default public imager endpoint (relative — served by the site itself). */
-export const DEFAULT_IMAGER_URL = "/imaging";
+/** Build an absolute default imager URL from public env vars. */
+function defaultImagerUrl(): string {
+	const pub = process.env.NEXT_PUBLIC_IMAGER_URL?.trim();
+	if (pub && !pub.includes("/api/imaging/avatar")) return pub.replace(/\/+$/, "");
+	const app = process.env.NEXT_PUBLIC_APP_URL?.trim();
+	if (app) return `${app.replace(/\/+$/, "")}/imaging`;
+	return "/imaging";
+}
 
 /**
  * Resolve the public-facing imager base URL.
@@ -25,7 +31,7 @@ export function resolveImagerBase(configured?: string | null): string {
 
 	const v = (configured ?? "").trim();
 	if (!v || v.includes("/api/imaging/avatar")) {
-		return DEFAULT_IMAGER_URL;
+		return defaultImagerUrl();
 	}
 	return v.replace(/\/+$/, "");
 }