Remove the 3 tabs (In project / Search / Installed). One list now: browse your
installed + custom libraries by default, search the index when you type. Each
row is state-aware:
+ Add to project — installs if needed, then declares it on the active board
In project (toggle) — click to remove from this board's manifest
Uninstall / Remove — free the cache / remove your custom upload
'Install' is folded into 'Add to project' (install-on-add) for simplicity. The
per-board manifest (board.libraries) stays the compile scope. The pro custom-zip
upload button still injects into .lib-modal-header. The in-modal velxio.json
editor tab is gone (the manifest is shown by the explorer's libraries.json file).
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