FEAT(Screenshot border): Make the screenshot border on Microsoft store downloads not show.

packaging/windows/store/appxmanifest.xml

@@ -4,14 +4,16 @@
      storeVersion there); electron-builder fills the ${...} values from the
      appx options.
      Based on electron-builder's templates/appx/appxmanifest.xml, plus the uap3
-     namespace for the stepforge.exe execution alias in extensions.xml. -->
+     namespace for the stepforge.exe execution alias in extensions.xml and
+     uap11 for graphicsCaptureWithoutBorder. -->
 <Package
    xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
    xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
    xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3"
    xmlns:desktop="http://schemas.microsoft.com/appx/manifest/desktop/windows10"
+   xmlns:uap11="http://schemas.microsoft.com/appx/manifest/uap/windows10/11"
    xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
-   IgnorableNamespaces="uap uap3 desktop rescap">
+   IgnorableNamespaces="uap uap3 uap11 desktop rescap">
   <!-- use single quotes to avoid double quotes escaping in the publisher value  -->
   <Identity Name="${identityName}"
     ProcessorArchitecture="${arch}"
@@ -29,7 +31,16 @@
   <Dependencies>
     <TargetDeviceFamily Name="Windows.Desktop" MinVersion="${minVersion}" MaxVersionTested="${maxVersionTested}" />
   </Dependencies>
-  ${capabilities}
+  <!-- Written out: electron-builder's capability list doesn't know
+       graphicsCaptureWithoutBorder. It lets StepForge hide the yellow border
+       Windows draws around a screen being recorded, once the user allows it
+       (Settings → Privacy & security → Screenshot borders). Desktop installs
+       get that from the "Desktop apps" switch there; a Store app needs this
+       capability and its own switch. Windows 10 ignores it. -->
+  <Capabilities>
+    <uap11:Capability Name="graphicsCaptureWithoutBorder" />
+    <rescap:Capability Name="runFullTrust" />
+  </Capabilities>
   <Applications>
     <Application Id="${applicationId}" Executable="${executable}" EntryPoint="Windows.FullTrustApplication">
       <uap:VisualElements

tests/unit/package-windows-store.test.js

@@ -111,6 +111,13 @@ test('the manifest carries the Store version and the stepforge.exe alias', () =>
     'splashScreen', 'arch', 'resourceLanguages', 'capabilities', 'extensions', 'minVersion', 'maxVersionTested'];
   assert.deepEqual(macros.filter((m) => !known.includes(m)), []);
   assert.ok(macros.includes('extensions'));
+  // The capabilities are written out, so electron-builder's list can't replace them.
+  assert.ok(!macros.includes('capabilities'));
+  assert.match(manifest, /xmlns:uap11="http:\/\/schemas\.microsoft\.com\/appx\/manifest\/uap\/windows10\/11"/);
+  assert.match(manifest, /IgnorableNamespaces="[^"]*\buap11\b[^"]*"/);
+  const capabilities = manifest.split('<Capabilities>')[1].split('</Capabilities>')[0];
+  assert.deepEqual([...capabilities.matchAll(/<(\w+):Capability Name="(\w+)" \/>/g)].map((m) => `${m[1]}:${m[2]}`),
+    ['uap11:graphicsCaptureWithoutBorder', 'rescap:runFullTrust']);
   assert.throws(() => renderStoreManifest('1.5.3.1'), /invalid Store version/);
 
   const extensions = read('packaging/windows/store/extensions.xml');