Dataclasses fail to parse kwargs correctly

[ms-pablo-ruiz]

Bug Report

When using several dataclasses with common arguments is sometimes convenient to pass the arguments as a kwargs dict. but that will raise an error:

#error: Argument 1 to "Data" has incompatible type "**dict[str, object]";

To Reproduce
I put here a silly example where the **common dict may not be that useful, but keep in mind that this occurs in more complex scenarios where the dataclass for instnace may have 5 common arguments out of 7, and passing it like this it actually makes sense.

@dataclass
class Data:
    car_id: int
    car: str

Data(car_id=1, car="hola")
common = {"car_id":1, "car":"hola"}
Data(**common) #error: Argument 1 to "Data" has incompatible type "**dict[str, object]"; expected "str"

Expected Behavior

No error,
ofc talso in more complex variants of the same thing, as python accepts the arguments of it

Actual Behavior

#error: Argument 1 to "Data" has incompatible type "**dict[str, object]";

**Your Environment**

- Mypy version used: 1.15.0
- Mypy command-line flags: None
- Mypy configuration options from `mypy.ini` (and other config files): not much
- Python version used: 3.13

[ms-pablo-ruiz]

Actually after thinking it more, maybe is not a bug, just the dict not being narrow enough

I guess there is a work around if we define the dictionary explicitly:

class Common(TypedDict):
    test: int
    car: str

common: Common = {"test":1, "car":"hola"}
Data(**common) # no error