feat: switch avatar imager to epicnabbo.nl with figure conversion

- Update imager to use epicnabbo.nl by default with effect=14 and img_format=apng
- Add figure string converter (old Habbo format -> epicnabbo.nl short format)
- Update avatarImageUrl to auto-convert figure strings
- Update online-users-widget to use new avatarImageUrl
- Add tests for imager and figure conversion

src/lib/format.ts

@@ -1,8 +1,8 @@
-import { resolveImagerBase } from "@/lib/imager";
+import { getNewFormatFigure } from "@/lib/figure-convert";
+import { getAvatarUrl } from "@/lib/imager";
 
 /** Build a Habbo avatar-imager URL for a figure string. */
 export function avatarImageUrl(
-	base: string,
 	look: string,
 	opts: {
 		size?: "s" | "m" | "l";
@@ -11,16 +11,8 @@ export function avatarImageUrl(
 		headDirection?: number;
 	} = {},
 ): string {
-	const resolved = resolveImagerBase(base);
-	const params = new URLSearchParams({ figure: look, img_format: "png" });
-	if (opts.size) params.set("size", opts.size);
-	if (opts.headOnly) params.set("headonly", "1");
-	if (opts.direction !== undefined)
-		params.set("direction", String(opts.direction));
-	if (opts.headDirection !== undefined)
-		params.set("head_direction", String(opts.headDirection));
-	const sep = resolved.includes("?") ? "&" : "?";
-	return `${resolved}${sep}${params.toString()}`;
+	const figure = getNewFormatFigure(look);
+	return getAvatarUrl(figure, opts);
 }
 
 /** URL-safe slug from a title (lowercase, ascii, hyphenated). */