enhance(windows): apply dark mode to menus and other controls

[ahodesuka]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes
• No

Checklist

• This PR will resolve [feat] Dark Right Click menus tauri#3240 (I think so at least)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary
• It can be built on all targets and pass CI/CD.

Other information

The current dark mode only applies to the window titlebar. An additional undocumented function
from uxtheme.dll must be called for the menus to appear with the dark theme.

The function that must be called has changed once since being introduced, in Windows 10 version 1903 (build 18362),
this latest version allows you to force the theme color you want instead of just allowing dark to
be set if it is the system default.

From what I have tested this works for system tray menus, menubar menus, and the system menu when right clicking the titlebar as seen below.

A somewhat related issue is tauri-apps/muda#97 although this issue seems to be more about the menubar control itself and not the menus.

Also closes tauri-apps/tauri#6645

[wusyong]

Not sure how will this work with external crate like muda since we plan to move menu feature into this crate.
@amrbashir could you help review this?

[ahodesuka]

This should work with muda and probably belongs in tao since it is in charge of managing themes.

[amrbashir]

Not sure how will this work with external crate like muda since we plan to move menu feature into this crate. @amrbashir could you help review this?

I will try to review ASAP (currently on a sick leave and some national holidays coming) but I agree with @ahodesuka, I think it is better to keep this in tao since it has info about the theme management and would be redundant to implement both in tao and muda, However, I think muda should add an easy API to call this undocumented method, so crates other than tao could call it whenever they want.

[amrbashir]

Actually since we don't plan on releasing this for 1.x, lets just implement this in muda and let tauri decide if it wants to use this API, does that sound alright?

[ahodesuka]

Looking at it now I think you are right. It should be implemented in muda and should perhaps expand to theme the menubar itself as well.
I found a quick example here in ppsspp that uses the method you mentioned in tauri-apps/muda#97, but uses the theme menu color avoiding the use of any hard coded values.

[amrbashir]

Yeah sounds good, feel free to open a PR there.

[amrbashir]

After taking a second look, I was wrong, this API that switches the context menu should be called in tao and the custom drawing of the menubar should be in muda.

[amrbashir]

@ahodesuka thanks for your contributions and I apologize for dismissing the PR earlier without a deeper look.