Option A — v2, app-styled + mobile layout + explicit "Scrobble release"

Addresses the three iteration asks: using the app's zinc/blue palette and Fluxon button variants, dedicated mobile layout, and a clear top-level "Scrobble release" action.

Action hierarchy
Header action → Scrobble release all tracks, one submission
Per-medium action → Scrobble disc tracks of that medium
Selection action → Scrobble selected only ticked rows — appears only when something is ticked
Desktop · sheet width ~520px Fluxon variants: solid primary / soft primary / outline
Kid A Mnesia
Radiohead · 2 CDs · 2021
Finished at Now · Apr 22, 14:30 ▾
Disc 1 CD
1 How to Disappear Completely 5:56
2 The National Anthem 5:51
3 Everything in Its Right Place 4:11
Disc 2 CD
1 Pyramid Song 4:49
2 Idioteque 5:09
3 Like Spinning Plates 3:57
2 tracks selected across 2 discs · 10:45
Scrobble release sits in the header beside the "Finished at" picker. Solid primary to mark the default action. Per-medium Scrobble disc uses the soft variant to stay a visible shortcut without competing with the primary.
Mobile · 360px width iPhone SE class
Kid A Mnesia
Radiohead · 2 CDs
Finished at Now ▾
Disc 1 CD
1 How to Disappear Completely 5:56
2 The National Anthem 5:51
Disc 2 CD
1 Pyramid Song 4:49
2 selected 10:45
Mobile reflow: title row stacks title + ⋯; the picker and "Release" button share a full-width row (picker grows, button hugs). Per-medium scrobble becomes icon-only to fit. Sticky bar label shortens to "Scrobble" + count + duration.
Design language notes