feat: migrate showdesktop and multitaskview to treeland-compositor-action-unstable-v1 protocol - #1757

On November 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: "wayland-treeland-compositor-action-unstable-v1-client-protocol.h" not found.

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

Include file: "dsglobal.h" not found.

Include file: "applet.h" not found.

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

Include file: "qwayland-treeland-compositor-action-unstable-v1.h" not found.

Include file: "dsglobal.h" not found.

The function 'switchUser' is never used.

The function 'lock' is never used.

Include file: "wayland-treeland-compositor-action-unstable-v1-client-protocol.h" not found.