The library completion stream calls updateLibraryReleaseCard once per
release as ownership resolves. The handler was still updating the OLD
card markup (.completion-text + .completion-fill / .completion-bar),
so cards rendered with the new .completion-overlay badge stayed stuck
in the pulsing 'Checking…' state forever.
Now updates the new structure in place:
- Toggles the .completion-overlay state class (checking → completed
/ nearly_complete / partial / missing) which the existing CSS uses
to colour and stop the checking-pulse animation.
- Rewrites the inner .completion-status text:
Owned → '✓ Owned'
Partial → 'X/Y' (75%+ → nearly_complete badge, else partial)
Missing → 'Missing'
- Sets a tooltip on the overlay with detailed track counts.
Per-card .release-card.checking class also gets removed when state
resolves (stops the whole-card opacity pulse).
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