Overhaul native approval UX and add widget surfaces

Bring the SwiftUI app in line with the Apple-native mock and keep pending approvals actionable from Live Activities and watch complications.

swift/WatchApp/Design/Haptics.swift

@@ -0,0 +1,16 @@
+import SwiftUI
+import WatchKit
+
+enum Haptics {
+    static func success() {
+        WKInterfaceDevice.current().play(.success)
+    }
+
+    static func warning() {
+        WKInterfaceDevice.current().play(.failure)
+    }
+
+    static func selection() {
+        WKInterfaceDevice.current().play(.click)
+    }
+}