add visibility delegates for fields in edit form

src/quickbot/model/descriptors.py

@@ -31,7 +31,7 @@ class FieldEditButton:
 
 @dataclass
 class CommandButton:
-    command: ContextData | Callable[[ContextData, Any], ContextData] | str
+    command: ContextData | Callable[["BotEntity", "BotContext"], ContextData] | str
     caption: str | LazyProxy | Callable[["BotEntity", "BotContext"], str] | None = None
     visibility: Callable[["BotEntity", "BotContext"], bool] | None = None
 
@@ -113,6 +113,12 @@ class _BaseFieldDescriptor:
     is_visible: (
         bool | Callable[["FieldDescriptor", "BotEntity", "BotContext"], bool] | None
     ) = None
+    is_visible_in_edit_form: (
+        bool
+        | Callable[["FieldDescriptor", Union["BotEntity", Any], "BotContext"], bool]
+        | None
+    ) = None
+    validator: Callable[[Any, "BotContext"], Union[bool, str]] | None = None
     localizable: bool = False
     bool_false_value: str | LazyProxy = "no"
     bool_true_value: str | LazyProxy = "yes"
@@ -219,6 +225,7 @@ class CommandCallbackContext[UT: UserBase]:
     db_session: AsyncSession
     user: UT
     app: "QBotApp"
+    app_state: State
     state_data: dict[str, Any]
     state: FSMContext
     form_data: dict[str, Any]