Add support for showing the user's own status over their avatar on the app's Settings button. (#5912)

* Add a common .inverseMask view modifier and use a blend mode for efficiency.

This also fixes the snapshot rendering 🎉

* Add support for the status emoji on the app's Setting button.

* Align the room header decoration icons with the status emoji.

* Add missing snapshots.

ElementX/Sources/Other/SwiftUI/InverseMask.swift

@@ -0,0 +1,24 @@
+//
+// Copyright 2026 Element Creations Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+import SwiftUI
+
+extension View {
+    /// Masks this view using the inverted alpha channel of the given view.
+    ///
+    /// The inverse of `mask(alignment:_:)`.
+    func inverseMask(alignment: Alignment = .center, @ViewBuilder _ inverseMask: () -> some View) -> some View {
+        mask {
+            Rectangle()
+                .overlay(alignment: alignment) {
+                    inverseMask()
+                        .blendMode(.destinationOut) // erases the rectangle wherever `mask` is opaque.
+                }
+                .compositingGroup()
+        }
+    }
+}