Gegenstands-Verwaltung (Non-Food) neben Lebensmitteln

Die Kategorie bestimmt die Verwaltungsart (food/object). Gegenstaende:
Menge je Lagerort statt Chargen/MHD, Umlagern (ohne Grund) und Entfernen
mit Pflicht-Grund samt Entnahme-Statistik. Beliebig viele eigene Felder
je Kategorie (vererbt an Unterkategorien), "gekauft bei" ueber eine
verwaltbare Shop-Liste und ein Produktlink. Barcode-Lookup zusaetzlich
ueber Open Products Facts.

Der Lebensmittel-Teil (Chargen/MHD/FEFO) bleibt unveraendert. Umgesetzt in
Backend (FastAPI, +Tests gruen), Web (React) und iOS (SwiftUI).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/routers/stock.py

@@ -1,10 +1,10 @@
 from fastapi import APIRouter, Depends, HTTPException, status
 from sqlalchemy.orm import Session
 
-from ..crud import resolve_product
+from ..crud import product_tracking, resolve_product
 from ..database import get_db
 from ..deps import get_current_user
-from ..models import Lot, Movement, MovementType, User
+from ..models import CategoryTracking, Lot, Movement, MovementType, User
 from ..schemas import (
     BatchCheckInRequest,
     BatchCheckInResponse,
@@ -14,6 +14,9 @@ from ..schemas import (
     CheckOutResponse,
     LotOut,
     LotUpdate,
+    RelocateRequest,
+    RemoveRequest,
+    StockActionResponse,
 )
 from ..services.conversion import ConversionError
 from ..services.dates import clean_precision, normalize_best_before
@@ -23,10 +26,15 @@ from ..services.stock import (
     check_out,
     check_out_lot,
     current_stock,
+    object_add,
+    object_relocate,
+    object_remove,
 )
 
 router = APIRouter(tags=["stock"])
 
+OBJECT = CategoryTracking.object.value
+
 
 @router.post("/stock/checkin", response_model=CheckInResponse)
 def stock_checkin(
@@ -35,6 +43,21 @@ def stock_checkin(
     user: User = Depends(get_current_user),
 ) -> CheckInResponse:
     product = resolve_product(db, payload.product_id, payload.barcode)
+    if product_tracking(db, product) == OBJECT:
+        # Gegenstände: Menge am Lagerort erhöhen, kein MHD, keine Charge-Auswahl.
+        lot = object_add(
+            db,
+            product=product,
+            quantity=payload.quantity,
+            location_id=payload.location_id,
+            user=user,
+            note=payload.note,
+        )
+        db.commit()
+        db.refresh(lot)
+        return CheckInResponse(
+            lot=LotOut.model_validate(lot), product_stock=current_stock(db, product.id)
+        )
     try:
         lot = check_in(
             db,
@@ -103,6 +126,12 @@ def stock_checkout(
     user: User = Depends(get_current_user),
 ) -> CheckOutResponse:
     product = resolve_product(db, payload.product_id, payload.barcode)
+    if product_tracking(db, product) == OBJECT:
+        raise HTTPException(
+            status.HTTP_400_BAD_REQUEST,
+            "Gegenstände werden über „Entfernen“ (mit Grund) oder „Umlagern“ gebucht, "
+            "nicht ausgecheckt.",
+        )
     try:
         if payload.lot_id is not None:
             lot = db.get(Lot, payload.lot_id)
@@ -138,6 +167,63 @@ def stock_checkout(
     )
 
 
+@router.post("/stock/relocate", response_model=StockActionResponse)
+def stock_relocate(
+    payload: RelocateRequest,
+    db: Session = Depends(get_db),
+    user: User = Depends(get_current_user),
+) -> StockActionResponse:
+    """Gegenstands-Menge von einem Lagerort zum anderen umbuchen (ohne Grund)."""
+    product = resolve_product(db, payload.product_id, payload.barcode)
+    if product_tracking(db, product) != OBJECT:
+        raise HTTPException(
+            status.HTTP_400_BAD_REQUEST, "Umlagern gibt es nur für Gegenstände."
+        )
+    try:
+        object_relocate(
+            db,
+            product=product,
+            quantity=payload.quantity,
+            from_location_id=payload.from_location_id,
+            to_location_id=payload.to_location_id,
+            user=user,
+            note=payload.note,
+        )
+    except StockError as exc:
+        raise HTTPException(status.HTTP_409_CONFLICT, str(exc)) from exc
+    db.commit()
+    return StockActionResponse(product_stock=current_stock(db, product.id))
+
+
+@router.post("/stock/remove", response_model=StockActionResponse)
+def stock_remove(
+    payload: RemoveRequest,
+    db: Session = Depends(get_db),
+    user: User = Depends(get_current_user),
+) -> StockActionResponse:
+    """Gegenstands-Menge mit Pflicht-Grund aus dem Bestand entfernen."""
+    product = resolve_product(db, payload.product_id, payload.barcode)
+    if product_tracking(db, product) != OBJECT:
+        raise HTTPException(
+            status.HTTP_400_BAD_REQUEST,
+            "Entfernen mit Grund gibt es nur für Gegenstände.",
+        )
+    try:
+        object_remove(
+            db,
+            product=product,
+            quantity=payload.quantity,
+            location_id=payload.location_id,
+            reason=payload.reason.value,
+            user=user,
+            note=payload.note,
+        )
+    except StockError as exc:
+        raise HTTPException(status.HTTP_409_CONFLICT, str(exc)) from exc
+    db.commit()
+    return StockActionResponse(product_stock=current_stock(db, product.id))
+
+
 @router.get("/lots", response_model=list[LotOut])
 def list_lots(
     product_id: int | None = None,