fix(desktop): resolve project models from packaged app

Author: JasonTM17

app/core/inference.py

@@ -8,7 +8,7 @@
 from app.core.config import SpecialistModelConfig
 from app.core.events import Detection
 from app.utils.logging import logger
-from app.utils.paths import resource_path
+from app.utils.paths import resolve_data_path, resource_path
 
 YOLO_SPECIALIST_SOURCE = "YOLO specialist"
 
@@ -209,11 +209,10 @@ def update_thresholds(self, conf=None, iou=None):
 
 def _resolve_model_path(model_path: str | Path) -> Path:
     path = Path(model_path)
-    if path.exists():
-        return path
-    bundled = resource_path(path)
-    if bundled.exists():
-        return bundled
+    candidates = (path, resource_path(path), resolve_data_path(path))
+    for candidate in candidates:
+        if candidate.exists() and candidate.is_file():
+            return candidate
     raise FileNotFoundError(f"model not found: {model_path}")
 
 

tests/unit/test_yolo_specialist.py

@@ -1,5 +1,6 @@
 from typing import ClassVar
 
+import app.core.inference as inference_module
 from app.core.config import SpecialistModelConfig
 from app.core.events import Detection
 from app.core.inference import (
@@ -119,3 +120,14 @@ def __init__(self, _path: str) -> None:
     assert engine.class_names == {0: "Aerosols", 1: "Aluminum can"}
     assert engine._specialist_class_names == {0: "Pen", 1: "Battery"}
     assert engine._specialist_class_ids == [0, 1]
+
+
+def test_model_path_falls_back_to_project_data_for_desktop_shortcut(tmp_path, monkeypatch):
+    model_path = tmp_path / "models" / "real-camera.pt"
+    model_path.parent.mkdir()
+    model_path.write_bytes(b"stub")
+
+    monkeypatch.setattr(inference_module, "resource_path", lambda _path: tmp_path / "bundle-missing")
+    monkeypatch.setattr(inference_module, "resolve_data_path", lambda _path: model_path)
+
+    assert inference_module._resolve_model_path("models/real-camera.pt") == model_path