release.yml: add fallback for existing releases on tag re-push.
installer.nsi: add .onInit file lock check, use LaunchApp function
instead of RUN_PARAMETERS to fix NSIS quoting bug.
build-dist.ps1: copy start-hidden.vbs to dist scripts/.
start-hidden.vbs: embedded Python fallback for installed/dev envs.
Update ci-cd.md with version detection, NSIS best practices, local
build testing, Gitea vs GitHub differences, troubleshooting.
Update frontend.md with full entity type checklist and common pitfalls.
Windows embedded Python ignores PYTHONPATH when a ._pth file exists.
Add ../app/src to the ._pth so wled_controller is importable.
Fixes ModuleNotFoundError on portable builds.