fix(recipe): task di default per il disegno e' task_type=drawing (#36 punto 5)

update_current_version creava il task di default (nessun task ancora sulla
versione) senza task_type, quindi finiva "note" invece di "drawing" come
fa create_new_version alla riga ~293. Aggiunta la riga mancante.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/backend/services/recipe_service.py

@@ -425,6 +425,7 @@ async def update_current_version(
             default_task = RecipeTask(
                 version_id=current.id,
                 order_index=0,
+                task_type="drawing",
                 title="Technical Drawing",
                 file_path=data.file_path,
                 file_type=data.file_type or (

src/backend/tests/test_recipe_service_drawing_task_type.py

@@ -0,0 +1,42 @@
+"""Unit test for recipe_service.update_current_version (gitea#36 point 5).
+
+The default task created to hold a drawing when a version has no tasks yet
+must be task_type="drawing" (as create_new_version already does at line
+~293), not the "note" default — otherwise the operator screen treats a
+version with only a drawing as an empty note.
+"""
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from src.backend.models.api.recipe import RecipeUpdate
+from src.backend.models.orm.recipe import Recipe, RecipeVersion
+from src.backend.models.orm.task import RecipeTask
+from src.backend.services import recipe_service
+
+
+async def test_default_task_from_update_current_version_is_drawing_type(
+    db_session: AsyncSession, admin_user,
+):
+    recipe = Recipe(
+        code="DRAW-425", name="Drawing only", created_by=admin_user.id,
+    )
+    db_session.add(recipe)
+    await db_session.flush()
+
+    version = RecipeVersion(
+        recipe_id=recipe.id, version_number=1, is_current=True,
+        created_by=admin_user.id,
+    )
+    db_session.add(version)
+    await db_session.flush()
+    # No RecipeTask yet: update_current_version must create the default one.
+
+    await recipe_service.update_current_version(
+        db_session, recipe.id, RecipeUpdate(file_path="1/1/drawing.png"),
+    )
+    await db_session.commit()
+
+    result = await db_session.execute(
+        RecipeTask.__table__.select().where(RecipeTask.version_id == version.id)
+    )
+    task = result.mappings().one()
+    assert task["task_type"] == "drawing"