Fix order saving, isMyOrder, blocked waiters, options pricing; add preferences, table groups, product images

Backend:
- OrderItemInput accepts option objects {id,name,price_delta} instead of int IDs
- extra_cost from selected options added to unit_price snapshot
- GET /api/products/?all=true for manager (includes unavailable)
- PUT /api/products/{id} now replaces options, ingredients, preference_sets
- POST /api/products/{id}/image — persistent image upload to /app/data/product_images
- New models: ProductPreferenceSet, ProductPreferenceChoice, TableGroup
- tables: group_id FK, hard delete (?hard=true), batch create POST /api/tables/batch
- GET /api/tables/groups + POST/PUT/DELETE groups endpoints
- POST /api/auth/me endpoint for token rehydration
- Auto-migration on startup for new columns

PWA:
- AuthRehydrator: fetches /auth/me on load so isMyOrder works after page reload
- 401 response force-logs out (covers blocked waiters)
- ItemOptionsModal: uses extra_cost correctly, shows preferences as radio buttons

Manager:
- ProductsPage: shows unavailable products greyed out, category color picker + reorder,
  full option/ingredient/preference editing, image upload
- TablesPage: table groups, auto-increment, deactivate vs hard delete, batch add

local_backend/schemas/product.py

@@ -2,28 +2,34 @@ from pydantic import BaseModel
 from typing import Optional, List
 
 
-class CategoryBase(BaseModel):
+class CategoryCreate(BaseModel):
     name: str
     color: Optional[str] = None
     sort_order: int = 0
 
 
-class CategoryCreate(CategoryBase):
-    pass
-
-
 class CategoryUpdate(BaseModel):
     name: Optional[str] = None
     color: Optional[str] = None
     sort_order: Optional[int] = None
 
 
-class CategoryOut(CategoryBase):
+class CategoryOut(BaseModel):
     id: int
+    name: str
+    color: Optional[str] = None
+    sort_order: int = 0
 
     model_config = {"from_attributes": True}
 
 
+class CategoryReorderItem(BaseModel):
+    id: int
+    sort_order: int
+
+
+# ── Options ──────────────────────────────────────────────────────────────────
+
 class ProductOptionBase(BaseModel):
     name: str
     extra_cost: float = 0.0
@@ -40,8 +46,11 @@ class ProductOptionOut(ProductOptionBase):
     model_config = {"from_attributes": True}
 
 
+# ── Ingredients ───────────────────────────────────────────────────────────────
+
 class ProductIngredientBase(BaseModel):
     name: str
+    extra_cost: float = 0.0
 
 
 class ProductIngredientCreate(ProductIngredientBase):
@@ -55,6 +64,42 @@ class ProductIngredientOut(ProductIngredientBase):
     model_config = {"from_attributes": True}
 
 
+# ── Preferences ───────────────────────────────────────────────────────────────
+
+class PreferenceChoiceBase(BaseModel):
+    name: str
+    extra_cost: float = 0.0
+
+
+class PreferenceChoiceCreate(PreferenceChoiceBase):
+    pass
+
+
+class PreferenceChoiceOut(PreferenceChoiceBase):
+    id: int
+    set_id: int
+
+    model_config = {"from_attributes": True}
+
+
+class PreferenceSetBase(BaseModel):
+    name: str
+
+
+class PreferenceSetCreate(PreferenceSetBase):
+    choices: List[PreferenceChoiceCreate] = []
+
+
+class PreferenceSetOut(PreferenceSetBase):
+    id: int
+    product_id: int
+    choices: List[PreferenceChoiceOut] = []
+
+    model_config = {"from_attributes": True}
+
+
+# ── Products ──────────────────────────────────────────────────────────────────
+
 class ProductBase(BaseModel):
     name: str
     category_id: Optional[int] = None
@@ -66,6 +111,7 @@ class ProductBase(BaseModel):
 class ProductCreate(ProductBase):
     options: List[ProductOptionCreate] = []
     ingredients: List[ProductIngredientCreate] = []
+    preference_sets: List[PreferenceSetCreate] = []
 
 
 class ProductUpdate(BaseModel):
@@ -74,11 +120,16 @@ class ProductUpdate(BaseModel):
     base_price: Optional[float] = None
     is_available: Optional[bool] = None
     printer_zone_id: Optional[int] = None
+    options: Optional[List[ProductOptionCreate]] = None
+    ingredients: Optional[List[ProductIngredientCreate]] = None
+    preference_sets: Optional[List[PreferenceSetCreate]] = None
 
 
 class ProductOut(ProductBase):
     id: int
     options: List[ProductOptionOut] = []
     ingredients: List[ProductIngredientOut] = []
+    preference_sets: List[PreferenceSetOut] = []
+    image_url: Optional[str] = None
 
     model_config = {"from_attributes": True}