- single click selects a photo (ring + aria-pressed) and shows its info in the right panel without navigating; double click opens the viewer
- shared 'selection' store; panel uses the route photo in viewer mode and the selected photo in album mode; selection resets on album change
- openspec: sync lightroom-workspace-ui (grid-selection requirement, viewer chrome wording without timers, nested f fullscreen, tasks 9.9/9.10)
iu
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