diff --git a/models.py b/models.py
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+"""
+Pydantic v1 models for the restaurant extension.
+
+Naming convention:
+  * `<Entity>`         — the row as stored / returned (id + timestamps).
+  * `Create<Entity>`   — request body for POST.
+  * `Update<Entity>`   — request body for PUT/PATCH (all fields optional).
+
+JSON-encoded list/dict columns are parsed in pre-validators so callers
+always see structured types.
+"""
+
+import json
+from datetime import datetime
+from typing import Any, Optional
+
+from pydantic import BaseModel, Field, validator
+
+
+# --------------------------------------------------------------------- #
+# Helpers                                                               #
+# --------------------------------------------------------------------- #
+
+
+def _parse_json_list(v: Any) -> list:
+    if v is None or v == "":
+        return []
+    if isinstance(v, str):
+        try:
+            return json.loads(v) or []
+        except json.JSONDecodeError:
+            return []
+    return list(v)
+
+
+def _parse_json_dict(v: Any) -> dict:
+    if v is None or v == "":
+        return {}
+    if isinstance(v, str):
+        try:
+            return json.loads(v) or {}
+        except json.JSONDecodeError:
+            return {}
+    return dict(v)
+
+
+# --------------------------------------------------------------------- #
+# Restaurant                                                            #
+# --------------------------------------------------------------------- #
+
+
+class OpenHours(BaseModel):
+    """Weekly opening schedule. Weekday key 0=Mon .. 6=Sun.
+
+    Each day is a list of {start, end} ranges so a venue can be open
+    e.g. 11:00-15:00 and 18:00-23:00 in the same day. Persisted as
+    JSON in the DB.
+
+    Typed as plain `dict` (not `dict[str, list[dict[str, str]]]`) so
+    LNbits's `db.dict_to_model` walks the field cleanly: its
+    introspection calls `issubclass(field.type_, bool)` while
+    iterating, and a parameterized generic alias trips it with
+    "issubclass() arg 1 must be a class". The runtime shape is
+    still the dict-of-lists-of-dicts described above.
+    """
+
+    schedule: dict = Field(default_factory=dict)
+
+
+class SocialLinks(BaseModel):
+    website: Optional[str] = None
+    instagram: Optional[str] = None
+    facebook: Optional[str] = None
+    twitter: Optional[str] = None
+    nostr: Optional[str] = None
+
+
+class RestaurantExtra(BaseModel):
+    notes: Optional[str] = None
+    # Typed as plain `dict` (not `dict[str, str]`) so LNbits's
+    # `db.dict_to_model` round-trips it cleanly — see OpenHours for
+    # the same workaround and rationale.
+    fields: dict = Field(default_factory=dict)
+
+
+class CreateRestaurant(BaseModel):
+    wallet: Optional[str] = None
+    name: str
+    slug: str
+    description: Optional[str] = None
+    currency: str = "sat"
+    timezone: str = "UTC"
+    location: Optional[str] = None
+    geohash: Optional[str] = None
+    logo_url: Optional[str] = None
+    banner_url: Optional[str] = None
+    social_links: SocialLinks = Field(default_factory=SocialLinks)
+    open_hours: OpenHours = Field(default_factory=OpenHours)
+    is_open: bool = True
+    accepts_cash: bool = True
+    accepts_lightning: bool = True
+    tip_presets: list[int] = Field(default_factory=list)
+    tax_rate: float = 0
+    printer_endpoint: Optional[str] = None
+    nostr_pubkey: Optional[str] = None
+    nostr_relays: list[str] = Field(default_factory=list)
+    extra: RestaurantExtra = Field(default_factory=RestaurantExtra)
+
+
+class Restaurant(BaseModel):
+    id: str
+    wallet: str
+    name: str
+    slug: str
+    description: Optional[str] = None
+    currency: str = "sat"
+    timezone: str = "UTC"
+    location: Optional[str] = None
+    geohash: Optional[str] = None
+    logo_url: Optional[str] = None
+    banner_url: Optional[str] = None
+    social_links: SocialLinks = Field(default_factory=SocialLinks)
+    open_hours: OpenHours = Field(default_factory=OpenHours)
+    is_open: bool = True
+    accepts_cash: bool = True
+    accepts_lightning: bool = True
+    tip_presets: list[int] = Field(default_factory=list)
+    tax_rate: float = 0
+    printer_endpoint: Optional[str] = None
+    nostr_pubkey: Optional[str] = None
+    nostr_relays: list[str] = Field(default_factory=list)
+    nostr_event_id: Optional[str] = None
+    nostr_event_created_at: Optional[int] = None
+    extra: RestaurantExtra = Field(default_factory=RestaurantExtra)
+    time: datetime
+
+    @validator("social_links", pre=True)
+    def _parse_social(cls, v):
+        if isinstance(v, str):
+            return SocialLinks(**_parse_json_dict(v))
+        return v or SocialLinks()
+
+    @validator("open_hours", pre=True)
+    def _parse_hours(cls, v):
+        if isinstance(v, str):
+            return OpenHours(**_parse_json_dict(v))
+        return v or OpenHours()
+
+    @validator("tip_presets", pre=True)
+    def _parse_presets(cls, v):
+        return _parse_json_list(v)
+
+    @validator("nostr_relays", pre=True)
+    def _parse_relays(cls, v):
+        return _parse_json_list(v)
+
+    @validator("extra", pre=True)
+    def _parse_extra(cls, v):
+        if isinstance(v, str):
+            return RestaurantExtra(**_parse_json_dict(v))
+        return v or RestaurantExtra()
+
+
+# --------------------------------------------------------------------- #
+# Categories / subcategories                                            #
+# --------------------------------------------------------------------- #
+
+
+class CreateCategory(BaseModel):
+    restaurant_id: str
+    name: str
+    description: Optional[str] = None
+    sort_order: int = 0
+    image_url: Optional[str] = None
+
+
+class Category(BaseModel):
+    id: str
+    restaurant_id: str
+    name: str
+    description: Optional[str] = None
+    sort_order: int = 0
+    image_url: Optional[str] = None
+    time: datetime
+
+
+class CreateSubcategory(BaseModel):
+    category_id: str
+    name: str
+    sort_order: int = 0
+
+
+class Subcategory(BaseModel):
+    id: str
+    category_id: str
+    name: str
+    sort_order: int = 0
+    time: datetime
+
+
+# --------------------------------------------------------------------- #
+# Menu items                                                            #
+# --------------------------------------------------------------------- #
+
+
+class MenuItemExtra(BaseModel):
+    """Free-form metadata that doesn't deserve a column yet."""
+
+    notes: Optional[str] = None
+    # Plain `dict` — see OpenHours for the LNbits round-trip workaround.
+    fields: dict = Field(default_factory=dict)
+
+
+class CreateMenuItem(BaseModel):
+    restaurant_id: str
+    category_id: Optional[str] = None
+    subcategory_id: Optional[str] = None
+    name: str
+    description: Optional[str] = None
+    price: float = 0
+    currency: str = "sat"
+    sku: Optional[str] = None
+    images: list[str] = Field(default_factory=list)
+    dietary: list[str] = Field(default_factory=list)
+    allergens: list[str] = Field(default_factory=list)
+    ingredients: list[str] = Field(default_factory=list)
+    calories: Optional[int] = None
+    sort_order: int = 0
+    is_available: bool = True
+    is_featured: bool = False
+    stock: Optional[int] = None
+    low_stock_threshold: Optional[int] = None
+    extra: MenuItemExtra = Field(default_factory=MenuItemExtra)
+
+
+class MenuItem(BaseModel):
+    id: str
+    restaurant_id: str
+    category_id: Optional[str] = None
+    subcategory_id: Optional[str] = None
+    name: str
+    description: Optional[str] = None
+    price: float = 0
+    currency: str = "sat"
+    sku: Optional[str] = None
+    images: list[str] = Field(default_factory=list)
+    dietary: list[str] = Field(default_factory=list)
+    allergens: list[str] = Field(default_factory=list)
+    ingredients: list[str] = Field(default_factory=list)
+    calories: Optional[int] = None
+    sort_order: int = 0
+    is_available: bool = True
+    is_featured: bool = False
+    stock: Optional[int] = None
+    low_stock_threshold: Optional[int] = None
+    nostr_event_id: Optional[str] = None
+    nostr_event_created_at: Optional[int] = None
+    extra: MenuItemExtra = Field(default_factory=MenuItemExtra)
+    time: datetime
+
+    @validator("images", "dietary", "allergens", "ingredients", pre=True)
+    def _parse_lists(cls, v):
+        return _parse_json_list(v)
+
+    @validator("extra", pre=True)
+    def _parse_extra(cls, v):
+        if isinstance(v, str):
+            return MenuItemExtra(**_parse_json_dict(v))
+        return v or MenuItemExtra()
+
+
+# --------------------------------------------------------------------- #
+# Modifier groups + modifiers                                           #
+# --------------------------------------------------------------------- #
+
+
+class CreateModifierGroup(BaseModel):
+    menu_item_id: str
+    name: str
+    kind: str = "required"  # 'required' | 'optional'
+    selection: str = "one"  # 'one' | 'many'
+    min_selections: int = 0
+    max_selections: Optional[int] = None
+    sort_order: int = 0
+
+
+class ModifierGroup(BaseModel):
+    id: str
+    menu_item_id: str
+    name: str
+    kind: str = "required"
+    selection: str = "one"
+    min_selections: int = 0
+    max_selections: Optional[int] = None
+    sort_order: int = 0
+    time: datetime
+
+
+class CreateModifier(BaseModel):
+    group_id: str
+    name: str
+    description: Optional[str] = None
+    price_delta: float = 0
+    is_default: bool = False
+    sort_order: int = 0
+
+
+class Modifier(BaseModel):
+    id: str
+    group_id: str
+    name: str
+    description: Optional[str] = None
+    price_delta: float = 0
+    is_default: bool = False
+    sort_order: int = 0
+    time: datetime
+
+
+# --------------------------------------------------------------------- #
+# Availability windows                                                  #
+# --------------------------------------------------------------------- #
+
+
+class CreateAvailabilityWindow(BaseModel):
+    menu_item_id: str
+    weekday: Optional[int] = None  # 0=Mon, 6=Sun, None = every day
+    start_time: str  # 'HH:MM'
+    end_time: str  # 'HH:MM'
+
+    @validator("weekday")
+    def _check_weekday(cls, v):
+        if v is not None and not 0 <= v <= 6:
+            raise ValueError("weekday must be in 0..6 or null")
+        return v
+
+
+class AvailabilityWindow(BaseModel):
+    id: str
+    menu_item_id: str
+    weekday: Optional[int] = None
+    start_time: str
+    end_time: str
+    time: datetime
+
+
+# --------------------------------------------------------------------- #
+# Orders                                                                #
+# --------------------------------------------------------------------- #
+
+
+class SelectedModifier(BaseModel):
+    """Snapshot of a chosen modifier at order time."""
+
+    group_id: Optional[str] = None
+    group_name: Optional[str] = None
+    modifier_id: Optional[str] = None
+    name: str
+    price_delta: float = 0
+
+
+class CreateOrderItem(BaseModel):
+    menu_item_id: str
+    quantity: int = 1
+    selected_modifiers: list[SelectedModifier] = Field(default_factory=list)
+    note: Optional[str] = None
+
+
+class OrderItemRow(BaseModel):
+    id: str
+    order_id: str
+    menu_item_id: Optional[str] = None
+    name: str
+    quantity: int = 1
+    unit_price_msat: int = 0
+    line_total_msat: int = 0
+    selected_modifiers: list[SelectedModifier] = Field(default_factory=list)
+    note: Optional[str] = None
+    time: datetime
+
+    @validator("selected_modifiers", pre=True)
+    def _parse_mods(cls, v):
+        if isinstance(v, str):
+            try:
+                raw = json.loads(v) if v else []
+                return [SelectedModifier(**m) for m in raw]
+            except json.JSONDecodeError:
+                return []
+        return v or []
+
+
+class OrderExtra(BaseModel):
+    fiat: bool = False
+    fiat_currency: Optional[str] = None
+    fiat_rate: Optional[float] = None
+    refund_address: Optional[str] = None
+    # Plain `dict` — see OpenHours for the LNbits round-trip workaround.
+    fields: dict = Field(default_factory=dict)
+
+
+class CreateOrder(BaseModel):
+    restaurant_id: str
+    customer_pubkey: Optional[str] = None
+    customer_name: Optional[str] = None
+    customer_contact: Optional[str] = None
+    items: list[CreateOrderItem]
+    tip_msat: int = 0
+    note: Optional[str] = None
+    parent_order_ref: Optional[str] = None
+    channel: str = "rest"  # 'rest' | 'nostr' | 'kiosk' | 'pos'
+    payment_method: str = "lightning"  # 'lightning' | 'cash' | 'internal'
+    extra: OrderExtra = Field(default_factory=OrderExtra)
+
+
+class Order(BaseModel):
+    id: str
+    restaurant_id: str
+    wallet: str
+    customer_pubkey: Optional[str] = None
+    customer_name: Optional[str] = None
+    customer_contact: Optional[str] = None
+    status: str = "pending"
+    channel: str = "rest"
+    payment_method: str = "lightning"
+    payment_hash: Optional[str] = None
+    bolt11: Optional[str] = None
+    subtotal_msat: int = 0
+    tip_msat: int = 0
+    tax_msat: int = 0
+    total_msat: int = 0
+    currency_display: str = "sat"
+    fiat_amount: Optional[float] = None
+    fiat_rate: Optional[float] = None
+    note: Optional[str] = None
+    parent_order_ref: Optional[str] = None
+    paid_at: Optional[datetime] = None
+    accepted_at: Optional[datetime] = None
+    ready_at: Optional[datetime] = None
+    completed_at: Optional[datetime] = None
+    canceled_at: Optional[datetime] = None
+    extra: OrderExtra = Field(default_factory=OrderExtra)
+    time: datetime
+
+    @validator("extra", pre=True)
+    def _parse_extra(cls, v):
+        if isinstance(v, str):
+            return OrderExtra(**_parse_json_dict(v))
+        return v or OrderExtra()
+
+
+class OrderWithItems(BaseModel):
+    order: Order
+    items: list[OrderItemRow]
+
+
+class OrderInvoice(BaseModel):
+    """Returned after a customer creates an order — pay this to confirm."""
+
+    order_id: str
+    payment_hash: str
+    bolt11: str
+    amount_msat: int
+    expires_at: int
+
+
+# --------------------------------------------------------------------- #
+# Print jobs                                                            #
+# --------------------------------------------------------------------- #
+
+
+class PrintJob(BaseModel):
+    id: str
+    restaurant_id: str
+    order_id: str
+    status: str = "queued"
+    attempts: int = 0
+    last_error: Optional[str] = None
+    sent_at: Optional[datetime] = None
+    acknowledged_at: Optional[datetime] = None
+    time: datetime
+
+
+# --------------------------------------------------------------------- #
+# Settings                                                              #
+# --------------------------------------------------------------------- #
+
+
+class RestaurantSettings(BaseModel):
+    nostr_publish_enabled: bool = True
+    nostr_orders_enabled: bool = False
+    invoice_expiry_seconds: int = 900
+    auto_accept_orders: bool = False