A bar below the toolbar pins under the top bar and jumps between the card
sections (Available / In other decks / Not owned, To pull / In deck, or
All cards, plus Maybeboard), marking the one in view. Where it fits it
shows inline tabs; on a narrow bar, one button names the current section
and opens a menu of them all, so nothing scrolls sideways. The switch
follows the bar's own width via a container query. It also holds the
deck filter and an up button back to the overview. Group headers and
column headers pin below the bar.
Closes#23
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Garrett Mills
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