feat : big update

lib/guides/export-image.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from "vitest";
+
+import { imageContentDisposition } from "@/lib/guides/export-image";
+
+describe("guide image downloads", () => {
+  it("provides a safe ASCII fallback and a UTF-8 filename", () => {
+    expect(imageContentDisposition("ไกด์อาวุธ", "weapons")).toBe(
+      "attachment; filename=\"weapons.png\"; filename*=UTF-8''%E0%B9%84%E0%B8%81%E0%B8%94%E0%B9%8C%E0%B8%AD%E0%B8%B2%E0%B8%A7%E0%B8%B8%E0%B8%98.png",
+    );
+  });
+
+  it("sanitizes punctuation in the fallback filename", () => {
+    expect(imageContentDisposition("Arlecchino / R5", "weapons")).toContain(
+      'filename="Arlecchino-R5.png"',
+    );
+  });
+});