feat: initial commit — local services (backend + manager dashboard + waiter PWA)

Includes all work to date:
- local_backend: FastAPI backend with products, orders, tables, shifts, cloud sync
- manager_dashboard: React manager UI with product/category management, reports, settings
- waiter_pwa: React PWA for waiter devices
- Category reparent endpoint and UI
- Waiter domain: local_ip sent on heartbeat, waiter_domain persisted from cloud response
- QR code modal in AppInfoTab for waiter domain
- Product form: number input spinners removed, category pre-selected on new product
- Category row: count badge moved to far right

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

local_backend/schemas/order.py

@@ -0,0 +1,126 @@
+from pydantic import BaseModel
+from datetime import datetime
+from typing import Optional, List
+from schemas.base import UTCDatetime
+
+
+class SelectedOptionInput(BaseModel):
+    id: Optional[int] = None
+    name: Optional[str] = None
+    price_delta: Optional[float] = None
+    extra_cost: Optional[float] = None
+    # type tags: "quick" | "pref" | "pref_sub" | "extra" | "extra_sub"
+    # Omitted by old clients — print code falls back gracefully.
+    type: Optional[str] = None
+
+
+class OrderItemInput(BaseModel):
+    product_id: int
+    quantity: int
+    selected_options: Optional[List[SelectedOptionInput]] = None
+    removed_ingredients: Optional[List[str]] = None
+    notes: Optional[str] = None
+
+
+class AddItemsRequest(BaseModel):
+    items: List[OrderItemInput]
+
+
+class ProductNameOut(BaseModel):
+    id: int
+    name: str
+    model_config = {"from_attributes": True}
+
+
+class OrderItemOut(BaseModel):
+    id: int
+    order_id: int
+    product_id: int
+    product: Optional[ProductNameOut] = None
+    added_by: int
+    quantity: int
+    unit_price: float
+    selected_options: Optional[str] = None
+    removed_ingredients: Optional[str] = None
+    notes: Optional[str] = None
+    status: str
+    added_at: UTCDatetime
+    printed: bool
+    paid_by: Optional[int] = None
+    paid_at: Optional[UTCDatetime] = None
+    payment_method: Optional[str] = None
+    paid_in_shift_id: Optional[int] = None
+
+    model_config = {"from_attributes": True}
+
+
+class PrintResultOut(BaseModel):
+    printer_name: str
+    success: bool
+    error: Optional[str] = None
+
+
+class AddItemsResponse(BaseModel):
+    order: "OrderOut"
+    print_results: List[PrintResultOut]
+
+    model_config = {"from_attributes": True}
+
+
+class OrderCreate(BaseModel):
+    table_id: int
+
+
+class PayItemsRequest(BaseModel):
+    item_ids: List[int]
+    payment_method: Optional[str] = None  # 'cash' | 'card' | 'other' — optional for now
+
+
+class OfflinePaymentRequest(BaseModel):
+    uuid: str                          # client-generated UUID, used for duplicate detection
+    item_ids: List[int]
+    payment_method: Optional[str] = None
+    offline_at: Optional[str] = None   # ISO timestamp of when payment was taken offline
+
+
+class AssignWaiterRequest(BaseModel):
+    waiter_id: int
+
+
+class OrderWaiterOut(BaseModel):
+    waiter_id: int
+    model_config = {"from_attributes": True}
+
+
+class AuditLogOut(BaseModel):
+    id: int
+    order_id: int
+    event_type: str
+    waiter_id: Optional[int] = None
+    waiter_name: Optional[str] = None   # resolved server-side
+    item_ids: Optional[str] = None
+    amount: Optional[float] = None
+    payment_method: Optional[str] = None
+    note: Optional[str] = None
+    created_at: UTCDatetime
+    offline_at: Optional[str] = None
+    is_duplicate: int = 0
+
+    model_config = {"from_attributes": True}
+
+
+class OrderOut(BaseModel):
+    id: int
+    table_id: int
+    opened_by: int
+    opened_at: UTCDatetime
+    status: str
+    closed_at: Optional[UTCDatetime] = None
+    closed_by: Optional[int] = None
+    notes: Optional[str] = None
+    business_day_id: Optional[int] = None
+    items: List[OrderItemOut] = []
+    waiters: List[OrderWaiterOut] = []
+    audit_logs: List[AuditLogOut] = []
+
+    model_config = {"from_attributes": True}