feat: focus terminal in basic cases

macos/Sources/Features/App Intents/FocusTerminalIntent.swift

@@ -0,0 +1,35 @@
+import AppKit
+import AppIntents
+import GhosttyKit
+
+struct FocusTerminalIntent: AppIntent {
+    static var title: LocalizedStringResource = "Focus Terminal"
+    static var description = IntentDescription("Move focus to an existing terminal.")
+
+    @Parameter(
+        title: "Terminal",
+        description: "The terminal to focus.",
+    )
+    var terminal: TerminalEntity
+
+    @available(macOS 26.0, *)
+    static var supportedModes: IntentModes = .background
+
+    @MainActor
+    func perform() async throws -> some IntentResult {
+        guard await requestIntentPermission() else {
+            throw GhosttyIntentError.permissionDenied
+        }
+
+        guard let surfaceView = terminal.surfaceView else {
+            throw GhosttyIntentError.surfaceNotFound
+        }
+
+        guard let controller = surfaceView.window?.windowController as? BaseTerminalController else {
+            return .result()
+        }
+
+        controller.focusSurface(surfaceView)
+        return .result()
+    }
+}