fix: hot-reload trade direction/whitelist on env save without forced restart.

EOF

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

lib/instance/instance_settings_register.py

@@ -60,6 +60,7 @@ def register_instance_settings_routes(
     exchange_key: str,
     username: str,
     password: str,
+    on_env_changed: Callable[[list[str]], None] | None = None,
 ) -> None:
     env_path = os.path.join(base_dir, ".env")
     example_path = os.path.join(base_dir, ".env.example")
@@ -107,6 +108,11 @@ def register_instance_settings_routes(
         changed = apply_env_updates(env_path, clean)
         groups = parse_env_example_schema(example_path)
         reload_info = apply_env_reload(env_path, get_db, changed, groups)
+        if changed and callable(on_env_changed):
+            try:
+                on_env_changed(changed)
+            except Exception as e:
+                print(f"[instance_settings] on_env_changed: {e}", flush=True)
         return jsonify(
             {
                 "ok": True,