feat(search): enable MindSearch defaults and sanitize user-facing search language.

Grant search_external and network egress for default users, enable search-enhanced skill, redact internal architecture terms from assistant UI text, and neutralize search skill prompts so chats use dual-engine web search without exposing vendor names.

Co-authored-by: Cursor <cursoragent@cursor.com>

conversation-display.test.mjs

@@ -75,6 +75,15 @@ test('deriveAssistantFacingText hides skill/process narration without a delivera
   assert.equal(deriveAssistantFacingText(internal), '');
 });
 
+test('deriveAssistantFacingText redacts architecture terms from user-visible replies', () => {
+  const raw =
+    '我通过 SearXNG 和 DuckDuckGo 搜索后汇总：OpenAI 最近发布了新模型。';
+  assert.equal(
+    deriveAssistantFacingText(raw),
+    '我通过 联网搜索 和 联网搜索 搜索后汇总：OpenAI 最近发布了新模型。',
+  );
+});
+
 test('deriveAssistantFacingText keeps user-facing replies with public links', () => {
   const external =
     '页面已生成：[AI 机器人研究报告 2026](https://m.tkmind.cn/MindSpace/john/public/ai-robot-report.html)';