add support for heic images

tests/test_app.py

@@ -2,7 +2,9 @@ from io import BytesIO
 from pathlib import Path
 
 import app.db as db_module
+import app.images as images_module
 from PIL import Image
+from fastapi import UploadFile
 
 from app.models import Box, Item, SubItem
 
@@ -572,6 +574,24 @@ def test_broken_image_processing_returns_400_and_keeps_image_fields_empty(client
     assert updated_box.image_height is None
 
 
+def test_heic_upload_returns_clear_error_if_heif_support_is_unavailable(monkeypatch):
+    heic_file = UploadFile(filename="sample.heic", file=BytesIO(b"not-a-real-heic"))
+
+    def fake_open(*args, **kwargs):
+        raise images_module.UnidentifiedImageError("cannot identify image file")
+
+    monkeypatch.setattr(images_module, "HEIF_SUPPORT_ENABLED", False)
+    monkeypatch.setattr(images_module.Image, "open", fake_open)
+    monkeypatch.setattr(images_module.shutil, "which", lambda command: None)
+
+    try:
+        images_module.process_upload(heic_file)
+        assert False, "Expected HEIC upload to raise HTTPException"
+    except Exception as exc:
+        assert getattr(exc, "status_code", None) == 400
+        assert "HEIC/HEIF" in getattr(exc, "detail", "")
+
+
 def test_can_search_box_by_name(client, db_session):
     box = Box(name="冬季衣物箱")
     db_session.add(box)