Add instance system guide nav (default off) with overview/options/hedge manual.

EOF

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

tests/test_instance_system_guide_lib.py

@@ -0,0 +1,31 @@
+"""系统说明 Markdown 加载与目录."""
+from __future__ import annotations
+
+from lib.instance.instance_system_guide_lib import (
+    load_system_guide_payload,
+    system_guide_md_path,
+    system_guide_template_context,
+)
+
+
+def test_system_guide_md_exists():
+    assert system_guide_md_path().is_file()
+
+
+def test_system_guide_payload_has_toc_and_html():
+    payload = load_system_guide_payload()
+    assert payload["html"]
+    assert "系统说明" in payload["html"] or "总览" in payload["html"]
+    toc = payload["toc"]
+    assert isinstance(toc, list)
+    assert len(toc) >= 3
+    assert all(item.get("id") and item.get("title") for item in toc)
+    assert any("总览" in (item.get("title") or "") for item in toc)
+    assert any("期权" in (item.get("title") or "") for item in toc)
+    assert any("对冲" in (item.get("title") or "") for item in toc)
+
+
+def test_system_guide_template_context():
+    ctx = system_guide_template_context()
+    assert ctx["system_guide_html"]
+    assert ctx["system_guide_toc"]