feat: MD-style popup print for strategy doc and checklist

Open clean white document in new tab with auto print dialog instead of printing the dark hub page.

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

tests/test_hub_strategy_lib.py

@@ -7,6 +7,7 @@ from lib.hub.hub_strategy_lib import (
     load_strategy_payload,
     strategy_meta_payload,
     build_export_html,
+    build_print_html,
 )
 
 
@@ -34,6 +35,15 @@ class TestHubStrategyLib(unittest.TestCase):
         self.assertIn("Gate", html)
         self.assertIn("☐", html)
 
+    def test_print_html_doc_and_checklist(self):
+        doc = build_print_html("binance", "doc")
+        cl = build_print_html("binance", "checklist")
+        self.assertIn("window.print", doc)
+        self.assertIn("window.print", cl)
+        self.assertIn("币安", doc)
+        self.assertIn("开仓检查清单", cl)
+        self.assertIn("☐", cl)
+
 
 if __name__ == "__main__":
     unittest.main()