fix(cli): handle i18n object category names in formatCategories

A category name could arrive as an i18n object ({en, zh}) the same way
tool descriptions already do. Reuse stringifyDesc for the name and only
fall back to slug when it is a string, so tags never render as
[object Object].

Author: linfangw

packages/cli/src/output/formatter.mjs

@@ -298,8 +298,10 @@ function formatCategories(categories) {
   for (const c of categories) {
     let label = "";
     if (typeof c === "string") label = c;
-    else if (c && typeof c === "object") label = c.name || c.slug || "";
-    label = String(label).trim();
+    else if (c && typeof c === "object") {
+      label = stringifyDesc(c.name) || (typeof c.slug === "string" ? c.slug : "");
+    }
+    label = label.trim();
     if (!label) continue;
     const key = label.toLowerCase();
     if (seen.has(key)) continue;

packages/cli/test/formatter.test.mjs

@@ -30,6 +30,18 @@ test("formatDiscoverResult renders object categories as names, not [object Objec
   assert.ok(output.includes("tags: finance, Market Data, slug-only"));
 });
 
+test("formatDiscoverResult renders i18n object names via their string values", () => {
+  const output = formatDiscoverResult(
+    discoverResultWith([
+      { slug: "fx", name: { en: "Foreign Exchange", zh: "外汇" } },
+      { slug: "rates", name: { zh: "利率" } },
+      { slug: "crypto-fallback", name: {} },
+    ]),
+  );
+  assert.ok(!output.includes("[object Object]"));
+  assert.ok(output.includes("tags: Foreign Exchange, 利率, crypto-fallback"));
+});
+
 test("formatDiscoverResult still renders string categories", () => {
   const output = formatDiscoverResult(discoverResultWith(["finance", "market-data"]));
   assert.ok(output.includes("tags: finance, market-data"));