Lagerorte per 10-Zeichen-Code statt fortlaufender ID; iOS-Einlagern ohne Kamerazwang

Lagerort-IDs sind jetzt ein zufaelliger 10-Zeichen-Code (wie die Einzelstueck-UIDs) statt einer fortlaufenden Zahl - so kollidiert die Stammdaten-Sicherung zwischen zwei Instanzen praktisch nie mehr, und der Code ist zugleich der Inhalt des QR /l/<code>. Alle Fremdschluessel (lots, movements, items, Mindestbestaende, parent_id) ziehen mit; die Umstellung laeuft einmalig und transaktional beim Serverstart (_migrate_locations_to_code) und rollt bei Fehlern komplett zurueck. Vor dem Deploy ein DB-Backup machen.

iOS-Einlagern oeffnet nicht mehr sofort die Kamera, sondern ein Formular mit Artikelsuche; die Kamera kommt erst per Button. Im Formular laesst sich der Lagerort zusaetzlich per /l/-QR scannen.

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

backend/app/schemas.py

@@ -111,13 +111,13 @@ class UserUpdate(BaseModel):
 # ---- Groups ----
 class LocationMinStockIn(BaseModel):
     """Ein Mindestbestand-Eintrag je Lagerort (Menge in Artikeleinheiten)."""
-    location_id: int
+    location_id: str
     min_stock: float = Field(ge=0)
 
 
 class LocationMinStockOut(BaseModel):
     model_config = ConfigDict(from_attributes=True)
-    location_id: int
+    location_id: str
     location_name: str | None = None
     min_stock: float
 
@@ -239,19 +239,19 @@ class FieldDefinitionOut(BaseModel):
 # ---- Locations ----
 class LocationOut(BaseModel):
     model_config = ConfigDict(from_attributes=True)
-    id: int
+    id: str
     name: str
-    parent_id: int | None = None
+    parent_id: str | None = None
 
 
 class LocationCreate(BaseModel):
     name: str = Field(min_length=1, max_length=120)
-    parent_id: int | None = None
+    parent_id: str | None = None
 
 
 class LocationUpdate(BaseModel):
     name: str | None = Field(default=None, min_length=1, max_length=120)
-    parent_id: int | None = None
+    parent_id: str | None = None
 
 
 # ---- Gebinde (Packung, Glas, …) ----
@@ -409,7 +409,7 @@ class CheckInRequest(BaseModel):
     best_before: date | None = None
     # "month" legt das MHD auf den Monatsletzten (siehe services/dates.py).
     best_before_precision: DatePrecision = DatePrecision.day
-    location_id: int | None = None
+    location_id: str | None = None
     note: str | None = None
 
 
@@ -430,7 +430,7 @@ class LotOut(BaseModel):
     quantity: float
     best_before: date | None
     best_before_precision: DatePrecision = DatePrecision.day
-    location_id: int | None
+    location_id: str | None
     created_at: datetime
 
 
@@ -439,7 +439,7 @@ class LotUpdate(BaseModel):
     quantity: float | None = Field(default=None, gt=0)
     best_before: date | None = None
     best_before_precision: DatePrecision | None = None
-    location_id: int | None = None
+    location_id: str | None = None
 
 
 class CheckInResponse(BaseModel):
@@ -452,7 +452,7 @@ class CheckInLine(BaseModel):
     quantity: float = Field(gt=0)
     best_before: date | None = None
     best_before_precision: DatePrecision = DatePrecision.day
-    location_id: int | None = None
+    location_id: str | None = None
 
 
 class BatchCheckInRequest(BaseModel):
@@ -479,8 +479,8 @@ class RelocateRequest(BaseModel):
     product_id: int | None = None
     barcode: str | None = None
     quantity: float = Field(gt=0)
-    from_location_id: int | None = None
-    to_location_id: int | None = None
+    from_location_id: str | None = None
+    to_location_id: str | None = None
     note: str | None = None
 
 
@@ -489,7 +489,7 @@ class RemoveRequest(BaseModel):
     product_id: int | None = None
     barcode: str | None = None
     quantity: float = Field(gt=0)
-    location_id: int | None = None
+    location_id: str | None = None
     reason: RemovalReason
     note: str | None = None
 
@@ -508,7 +508,7 @@ class RemovalStat(BaseModel):
 class RemovalHistoryItem(BaseModel):
     reason: RemovalReason
     quantity: float
-    location_id: int | None = None
+    location_id: str | None = None
     location_name: str | None = None
     note: str | None = None
     username: str | None = None
@@ -524,7 +524,7 @@ class RemovalSummary(BaseModel):
 class ItemCreate(BaseModel):
     """Ein oder mehrere Einzelstücke mit gemeinsamen Startwerten anlegen."""
     count: int = Field(default=1, ge=1, le=200)
-    location_id: int | None = None
+    location_id: str | None = None
     shop_id: int | None = None
     acquired_on: date | None = None
     warranty_until: date | None = None
@@ -534,7 +534,7 @@ class ItemCreate(BaseModel):
 
 
 class ItemUpdate(BaseModel):
-    location_id: int | None = None
+    location_id: str | None = None
     shop_id: int | None = None
     acquired_on: date | None = None
     warranty_until: date | None = None
@@ -578,7 +578,7 @@ class ItemOut(BaseModel):
     id: int
     uid: str
     product_id: int
-    location_id: int | None = None
+    location_id: str | None = None
     location_name: str | None = None
     shop_id: int | None = None
     shop_name: str | None = None
@@ -652,7 +652,7 @@ class LocationNeedGroup(BaseModel):
 
 class LocationNeeds(BaseModel):
     """Alle Bedarfe (Produkte + Gruppen) eines Lagerorts."""
-    location_id: int
+    location_id: str
     location_name: str
     products: list[LocationNeedProduct] = []
     groups: list[LocationNeedGroup] = []