Fix sway+nvidia confirmation dialog (#4481) (#4485)

* Fix sway+nvidia confirmation dialog (#4481)

Two bugs in the Sway+Nvidia driver confirmation:

1. The boolean was inverted - confirming "yes, I'm okay with issues"
   reverted the driver to the previous choice instead of keeping it.

2. The warning triggered for any Nvidia driver, including the
   open-source nouveau driver which is officially supported by Sway.

Add GfxDriver.is_nvidia_proprietary() and is_nvidia_nouveau() methods
so the warning fires only for nvidia-open-dkms (proprietary userspace).

* Address review feedback (#4485)

- Drop is_nvidia_nouveau() helper. It is not called anywhere yet; can
  be re-added when a consumer lands.
- Collapse the Sway+Nvidia confirmation result handling into a single
  expression now that allow_skip=False guarantees a boolean answer.

archinstall/lib/hardware.py

@@ -68,6 +68,19 @@ class GfxDriver(Enum):
 			case _:
 				return False
 
+	def is_nvidia_proprietary(self) -> bool:
+		"""
+		True for Nvidia drivers that ship proprietary userspace components.
+		Currently only NvidiaOpenKernel (nvidia-open-dkms): open kernel module
+		paired with proprietary userspace. NvidiaOpenSource (nouveau) is fully
+		open and works with Sway, so it is excluded.
+		"""
+		match self:
+			case GfxDriver.NvidiaOpenKernel:
+				return True
+			case _:
+				return False
+
 	def packages_text(self) -> str:
 		pkg_names = [p.value for p in self.gfx_packages()]
 		text = tr('Installed packages') + ':\n'

archinstall/lib/profile/profile_menu.py

@@ -95,7 +95,7 @@ class ProfileMenu(AbstractSubMenu[ProfileConfiguration]):
 				driver = await select_driver(preset=preset)
 
 			if driver and 'Sway' in profile.current_selection_names():
-				if driver.is_nvidia():
+				if driver.is_nvidia_proprietary():
 					header = tr('The proprietary Nvidia driver is not supported by Sway.') + '\n'
 					header += tr('It is likely that you will run into issues, are you okay with that?') + '\n'
 
@@ -105,8 +105,7 @@ class ProfileMenu(AbstractSubMenu[ProfileConfiguration]):
 						preset=False,
 					).show()
 
-					if result.get_value():
+					return driver if result.get_value() else preset
-						return preset
 
 		return driver