test(macos): boost Clawdis coverage to 40%

apps/macos/Sources/Clawdis/Utilities.swift

@@ -7,9 +7,12 @@ extension ProcessInfo {
     }
 
     var isRunningTests: Bool {
-        // SwiftPM test bundles are typically loaded from a `.xctest` bundle.
-        // We also check common XCTest env vars because some runners still set them.
+        // SwiftPM tests load one or more `.xctest` bundles. With Swift Testing, `Bundle.main` is not
+        // guaranteed to be the `.xctest` bundle, so check all loaded bundles.
+        if Bundle.allBundles.contains(where: { $0.bundleURL.pathExtension == "xctest" }) { return true }
         if Bundle.main.bundleURL.pathExtension == "xctest" { return true }
+
+        // Backwards-compatible fallbacks for runners that still set XCTest env vars.
         return self.environment["XCTestConfigurationFilePath"] != nil
             || self.environment["XCTestBundlePath"] != nil
             || self.environment["XCTestSessionIdentifier"] != nil