feat(ui): hide-to-tray Cmd-W / Cmd-M / Esc shortcuts on main window

ui/qml/Main.qml

@@ -619,9 +619,48 @@ ApplicationWindow {
         }
     }
 
+    // Hide-to-tray: every "close window" idiom on every supported platform routes through
+    // dismiss() so the engine and tray icon keep running. macOS LSUIElement bundles depend
+    // on this because the Dock close button never terminates the process; Linux and Windows
+    // tray builds inherit the same behavior for consistency.
+    function dismiss() {
+        if (!root.visible) {
+            return
+        }
+        root.hide()
+    }
+
     onClosing: function(close) {
         close.accepted = false
-        root.hide()
+        root.dismiss()
+    }
+
+    // LSUIElement apps have no platform menu bar binding StandardKey.Close to Cmd-W, and
+    // Ctrl/Cmd+M mirrors the OS "minimize" idiom. Qt.ApplicationShortcut keeps these active
+    // anywhere inside the Mouser process; enabled-when-visible avoids no-op fires while the
+    // window is already in the tray.
+    Shortcut {
+        sequence: StandardKey.Close
+        context: Qt.ApplicationShortcut
+        enabled: root.visible
+        onActivated: root.dismiss()
+    }
+
+    Shortcut {
+        sequence: "Ctrl+M"
+        context: Qt.ApplicationShortcut
+        enabled: root.visible
+        onActivated: root.dismiss()
+    }
+
+    // Qt.WindowShortcut keeps Esc scoped to the main window; modal Popups consume Esc via
+    // CloseOnEscape before it reaches the window-level shortcut, so we never hide while a
+    // dialog is up.
+    Shortcut {
+        sequence: "Escape"
+        context: Qt.WindowShortcut
+        enabled: root.visible
+        onActivated: root.dismiss()
     }
 
     Connections {