fix: defer printer initialization until ready - #794

On December 2, 2026, GitHub will restrict `pull_request_target` on public repositories by default. To continue allowing the event trigger, configure an Actions policy. Learn more: https://gh.io/securely-using-pull_request_target#default-policy-for-pull_request_target

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/setup-go@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Include file: <DPrintPreviewDialog> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <gtest/gtest.h> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <QSharedPointer> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <QPointer> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <QFutureWatcher> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <QBasicTimer> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: "dlabel.h" not found.

Include file: "diconbutton.h" not found.

Include file: "dframe.h" not found.

Include file: "dprintpreviewdialog.h" not found.