Microsoft Power Apps themes always automatically reset - themes

I am developing a power apps portal, trying to customize the portal themes,
it looks like even I pick the basic themes,
after a while, it automatically resets everything and ignores the CSS file I have uploaded
why is that?

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Microsoft Teams | Expand Tab using JS

Hi my organisation has been creating an app on microsoft teams that allows users to view glpi website inside of a teams tab. The app in itself is just a shortcut to make it easier for the users to navigate through teams.
We need to use an html file with java script in it so that the app redirects to the website in a tab as microsoft teams doesn't allow us to show external website inside of a teams app.
My question is the following : Is it possible that when as a user i click the app button and the redirection to the website tab happens, that this tab automatically expands so that it take all the space inside the teams client. I want it to trigger the "expand the tab" option. (I accept whatever solution you may find because i haven't been able to find something relevant)
This was my first post i thank you for you time and effort and for reading me, have a nice one.
(I tried my best to review this before posting but i'm not sure that i haven't made any mistakes).
I have tried a bunch of useless edits...
There doesn't seem to be any graph API available for pin an App.
We have app related graph API available for add app to team and install app to user.
Ref Doc: https://learn.microsoft.com/en-us/graph/api/team-post-installedapps?view=graph-rest-1.0&tabs=http
https://learn.microsoft.com/en-us/graph/api/userteamwork-post-installedapps?view=graph-rest-1.0&tabs=http
To redirecting your Tab in application you can use deeplink to Tab of an application.
Reference Document: https://learn.microsoft.com/en-us/microsoftteams/platform/concepts/build-and-test/deep-link-application?tabs=teamsjs-v2#generate-a-deep-link-to-your-tab

Outlook Web Add In can't open links in web browser

I have developed a very basic Outlook Web Add In, with the purpose of loading a Power Apps app by using an iframe object with a URL pointing to the app, all this from Office 365 on desktop devices.
It works as intended and, when loading, Power Apps asks the user to login first, this isn't the app itself asking to login, but Power Apps asking the user to identify first and then loading the app. This also works, at least on some devices.
It has come to my attention that some users can't make it past the login request, as instead of opening a browser tab and showing the login form, the iframe in the Add In, shows this message, which, obviously, makes users think the app isn't working:
This app isn't working. Refresh your browser or try again later
Apparently this message is not that uncommon and at least from what I've read it isn't clear enough either.
Besides that, Windows is displaying this message:
You'll need a new app to open this about link
I'm not even sure what it means, but it shows a list with zero apps that can open this "about link", and the option to go the Windows Store.
What should happen (and happens on some devices):
User is shown login request (by Power Apps)
User logs in
App is loaded and shown to the user
What happens (only on some devices):
User is shown login request (by Power Apps)
Windows can't open a web browser, so the user can't log in
Message saying app isn't working appears, because app was never loaded.
As I don't quite understand why this only happens on some cases, I have been testing the issue, and I have found that when the Power Apps login button is clicked, a file called ielowutil.exe, which apparently stands for Internet Low MIC Utility Tool, is executed before the web browser is shown with the login screen, and this only happens on the devices that can eventually load the app, the ones that fail never run this program.
From what I understand this file is related to Internet Explorer.
The Outlook Web Add In is already working within a web browser, according to Microsoft the browser is chosen automatically (Browsers used by Office Add-ins), so if it's already opened then I don't quite understand why it can't open a new tab/window.
The combination of system requirements for Office Add-ins and Power Apps may be the cause of the error here. While some combinations of platforms and Office versions still support IE 11 for add-ins and may default to opening URLs in IE per Browsers used by Office Add-ins and Support Internet Explorer 11, it looks like IE is no longer supported by Power Apps (see Supported browsers for running Power Apps).
For users who experience the issue you mentioned because of IE, you may need to add an alternate experience for the add-in to gracefully fail (see Determine at runtime if the add-in is running in Internet Explorer) or consider a different solution for hosting the Power Apps app.

Force an Electron app to always use the light theme?

I thought this would be easy but I haven't been able to find an answer yet. I'm building an app using Quasar Framework, which uses Electron to build desktop apps. It seems that when my MacOS uses a dark theme, the Electron app will also automatically start up with the dark theme (e.g. black page background), which messes up the styling of the app. I want to ensure that the app always starts up with the light theme.
I thought that to enable support for system theming you'd need to change a setting in the config. But it turned out that this doesn't seem to be the case since I didn't change anything and I also couldn't find any related setting via a search.

How do I redirect to another page in my custom app for Microsoft Teams?

I have a simple webapp that I am showing as an app in Teams. I have set it up in App Studio and everything works as I expect and it's all great. It is showing my web app and that is what I want.
For some cases, I need to redirect to a different web app on a different domain. When testing from Microsoft Teams in my browser, it works fine. But when I test from Microsoft Teams in the desktop app, then the screen just turns grey when the redirect was supposed to happen.
I already added the domains to this dialog in Manifest Editor.
Because the screen just goes grey with no explanation, I am having a hard time troubleshooting this issue.
#NielsBrinch Could you please take a look at Redirect across domains in a Microsoft Teams tab? Also please make sure that the tab you want to redirect to, is iframable and that it meets all the Requirements for tab.

The authorization popup for the Google Marketplace whitescreens and doesn't close after install and other problems with the install page

When a user goes to my unlisted marketplace app page and installs my app the authorization popup window just white screens and doesn't close. If I manually close the popup everything moves on like normal. I have a suspicion that it's because my app is unlisted, since I haven't seen the issue with other marketplace apps, but as of right now I can't change that.
Another issue we've had with that page is the Integrate with Google button doesn't seem to respect the current profile the user is using. It always seems to always use the default profile which can be confusing for the user if they wanted to use a different google profile they were currently using.
note: the app url i've posted is used for local development but it happens on our production app as well

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