Passing `**dict(...)` to `functools.partial` confuses mypy

Bug Report

Something like partial(func, **dict(a=1)) confuses mypy which seems to expect the dictionary keys to contain all the arguments to func, leading to errors if positional arguments are not specified (see this playground / gist), or if only a few arguments are specified and later more as passed to partial's return value (see this playground / gist).

Expected Behavior

I realise that mypy cannot know what ends up in an untyped dictionary, but it should maybe just give up in this case.

Actual Behavior

See gist.

Your Environment

• Mypy version used: mypy 1.15.0 (compiled: yes), but also master while using the playground
• Mypy command-line flags: none
• Mypy configuration options from mypy.ini (and other config files): none
• Python version used: 3.10.1, but also 3.13 while using the playground

Start by reproducing the two examples in the linked mypy playgrounds and gists with mypy 1.15.0 and master. Trace how functools.partial handles unpacked dictionaries, then verify that the reported cases no longer produce erroneous diagnostics while valid partial calls remain checked.