Fix community apply cancelling every time due to a focus race (#259)

fix: reactivate Codex before the community-apply rollback verification

DreamSkin is an LSUIElement (menu-bar only, no Dock icon). Once its own
confirmation alert closes, macOS never automatically hands focus back
to Codex. That leaves document.visibilityState stuck on "hidden" in
the Codex renderer, so captureActiveThemeThenApplyImported's rollback-
snapshot verification spuriously fails and cancels every community
apply within its full 12s/24-attempt retry budget, even though the
visible theme content is correct.

Confirmed live: the exact preserved rollback snapshot from a failed
attempt passes injector --verify immediately when Codex is manually
reactivated first, proving the snapshot content was never the problem.

Author: Fei-Away

macos/menubar-app/Sources/CodexDreamSkinMenuBar/AppDelegate.swift

@@ -813,6 +813,7 @@ final class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate {
       )
       return
     }
+    reactivateCodexBeforeTransaction()
     updateCommunityStage("正在保存当前主题、应用新主题并验证渲染…")
     ScriptRunner.run(
       script: transactionScript,
@@ -1283,6 +1284,18 @@ final class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate {
     NSApp.activate(ignoringOtherApps: true)
   }
 
+  /// DreamSkin is an LSUIElement with no Dock icon or regular window, so
+  /// macOS does not automatically return focus to Codex once this app's own
+  /// alert closes. Without this, `document.visibilityState` in the Codex
+  /// renderer stays "hidden" for the confirm dialog's caller, so the
+  /// rollback-snapshot verification in captureActiveThemeThenApplyImported
+  /// spuriously fails and cancels every community apply even though the
+  /// visible theme content is correct.
+  private func reactivateCodexBeforeTransaction() {
+    NSRunningApplication.runningApplications(withBundleIdentifier: "com.openai.codex")
+      .first?.activate(options: [.activateIgnoringOtherApps])
+  }
+
   private func showInfo(title: String, message: String) {
     let alert = NSAlert()
     alert.messageText = title