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>

manual_trading_hub/hub.py

@@ -80,6 +80,7 @@ from lib.hub.hub_entry_plan_lib import (
 )
 from lib.hub.hub_strategy_lib import (
     build_export_html,
+    build_print_html,
     load_strategy_payload,
     strategy_meta_payload,
 )
@@ -2985,6 +2986,19 @@ def api_strategy_export(exchange_key: str):
     )
 
 
+@app.get("/api/strategy/{exchange_key}/print")
+def api_strategy_print(exchange_key: str, part: str = "doc"):
+    key = exchange_key.strip().lower()
+    p = (part or "doc").strip().lower()
+    if p not in ("doc", "checklist"):
+        return JSONResponse({"ok": False, "msg": "part must be doc or checklist"}, status_code=400)
+    try:
+        html = build_print_html(key, p)
+    except KeyError:
+        return JSONResponse({"ok": False, "msg": "unknown exchange or part"}, status_code=404)
+    return HTMLResponse(content=html)
+
+
 @app.get("/api/entry-plans/meta")
 def api_entry_plans_meta():
     init_entry_plan_db()