Fix roll docs page by resolving markdown from repo root.

The /strategy/roll/docs link looked under lib/strategy/ while 顺势加仓滚仓说明.md lives at the repository root.

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

lib/strategy/strategy_register.py

@@ -129,8 +129,8 @@ def register_strategy_trading(app: Flask, cfg: dict[str, Any]) -> None:
     @_lr
     @app.route("/strategy/roll/docs")
     def strategy_roll_docs():
-        path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "顺势加仓滚仓说明.md")
+        path = _resolve_roll_doc_path()
-        if not os.path.isfile(path):
+        if not path:
             flash("滚仓说明文档不存在")
             return redirect(url_for("strategy_trading_page"))
         with open(path, encoding="utf-8") as f:
@@ -142,6 +142,19 @@ def register_strategy_trading(app: Flask, cfg: dict[str, Any]) -> None:
         )
 
 
+def _resolve_roll_doc_path() -> str | None:
+    """滚仓说明 md:优先包内,否则仓库根目录(顺势加仓滚仓说明.md)."""
+    here = os.path.dirname(os.path.abspath(__file__))
+    name = "顺势加仓滚仓说明.md"
+    for path in (
+        os.path.join(here, name),
+        os.path.normpath(os.path.join(here, "..", "..", name)),
+    ):
+        if os.path.isfile(path):
+            return path
+    return None
+
+
 def _roll_doc_markdown_to_html(text: str) -> str:
     """轻量 Markdown → HTML(仅供滚仓说明页)."""
     lines = text.splitlines()