fix: filter cloaked windows (DwmGetWindowAttribute DWMWA_CLOAKED) to exclude background UWP apps

crates/client/Cargo.toml

@@ -41,4 +41,5 @@ windows = { version = "0.54", features = [
     "Win32_UI_Shell",
     "Win32_System_Console",
     "Win32_System_ProcessStatus",
+    "Win32_Graphics_Dwm",
 ] }

crates/client/src/windows_mgmt.rs

@@ -7,6 +7,7 @@ use std::collections::HashMap;
 mod win_impl {
     use super::*;
     use windows::Win32::Foundation::{BOOL, HWND, LPARAM};
+    use windows::Win32::Graphics::Dwm::{DwmGetWindowAttribute, DWMWA_CLOAKED};
     use windows::Win32::UI::WindowsAndMessaging::{
         BringWindowToTop, EnumWindows, GetWindowTextW,
         IsWindowVisible, SetForegroundWindow, ShowWindow,
@@ -38,6 +39,18 @@ mod win_impl {
         list
     }
 
+    fn is_cloaked(hwnd: HWND) -> bool {
+        let mut cloaked: u32 = 0;
+        unsafe {
+            DwmGetWindowAttribute(
+                hwnd,
+                DWMWA_CLOAKED,
+                &mut cloaked as *mut u32 as *mut _,
+                std::mem::size_of::<u32>() as u32,
+            ).is_err() == false && cloaked != 0
+        }
+    }
+
     fn hwnd_title(hwnd: HWND) -> String {
         let mut buf = [0u16; 512];
         let len = unsafe { GetWindowTextW(hwnd, &mut buf) };
@@ -98,6 +111,9 @@ mod win_impl {
             if !visible {
                 continue;
             }
+            if is_cloaked(*hwnd) {
+                continue;
+            }
             let title = hwnd_title(*hwnd);
             if title.is_empty() {
                 continue;