fix: trade_policy 宏使用 with context 修复 500

Jinja imported macros did not receive trade_policy from render context, causing Internal Server Error on all instance pages.

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

scripts/diag_render_pages.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+"""Diagnose page render errors (run inside instance dir with venv)."""
+from __future__ import annotations
+
+import os
+import sys
+import traceback
+
+
+def main() -> int:
+    inst = sys.argv[1] if len(sys.argv) > 1 else "crypto_monitor_binance"
+    root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+    os.chdir(os.path.join(root, inst))
+    sys.path.insert(0, os.getcwd())
+    from app import app  # noqa: WPS433
+
+    paths = ["/trade", "/key_monitor", "/strategy", "/login"]
+    with app.test_client() as client:
+        with client.session_transaction() as sess:
+            sess["logged_in"] = True
+        for path in paths:
+            try:
+                resp = client.get(path)
+                print(f"{inst} {path} -> {resp.status_code}")
+                if resp.status_code >= 400:
+                    body = resp.get_data(as_text=True)
+                    print(body[:3000])
+            except Exception:
+                print(f"{inst} {path} -> EXCEPTION")
+                traceback.print_exc()
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())