v1.4.5

Desktop shelf alignment.\n\n- Moved the season summary inline to the left of the timeline as one bottom shelf.\n- Reserved bottom shelf space so desktop side panels stop above the season/timeline row.\n- Moved update feedback out of the side-panel lane when panels are open.\n- Added smoke coverage for the real timeline selector, shelf alignment, and no-overlap desktop geometry.\n- Built artifact SHA-256: 096b0b49cca8300b7154dbab4b5973c0b0b0be27d7689dc901c920cf161bd80f