refactor(ipm): move simple_refrig_api into app.ipm and update loader; ignore native binaries

app/core/refrigerant_loader.py

@@ -7,13 +7,21 @@ import os
 from pathlib import Path
 from typing import Dict, Optional, List
 
-# Ajouter le repertoire IPM_DLL au path pour importer simple_refrig_api
-_current_dir = Path(__file__).parent.parent.parent
-_ipm_dll_dir = _current_dir / "IPM_DLL"
-if str(_ipm_dll_dir) not in sys.path:
-    sys.path.insert(0, str(_ipm_dll_dir))
-
-from simple_refrig_api import Refifc
+# Prefer the packaged app.ipm module, but keep a fallback to the legacy
+# IPM_DLL folder for development compatibility.
+try:
+    from app.ipm.simple_refrig_api import Refifc, MockRefifc  # type: ignore
+except Exception:
+    # Fall back to loading from IPM_DLL directory as before. Import the
+    # module and pick attributes if present; older legacy wrappers may not
+    # define MockRefifc.
+    _current_dir = Path(__file__).parent.parent.parent
+    _ipm_dll_dir = _current_dir / "IPM_DLL"
+    if str(_ipm_dll_dir) not in sys.path:
+        sys.path.insert(0, str(_ipm_dll_dir))
+    import simple_refrig_api as _sr  # type: ignore
+    Refifc = getattr(_sr, 'Refifc')
+    MockRefifc = getattr(_sr, 'MockRefifc', None)
 
 
 class RefrigerantLibrary: