Adds a fourth source-tree bucket relative to the active axis: a file assigned on
the OTHER axis but not this one. With its own "Show Partial" toggle (and count)
you can assign a batch in one tab, switch tabs, show only Partial, and finish
them off — working in chunks across the two axes.
fileCategory now returns excluded / assigned (this axis) / partial (other axis
only) / unassigned (neither); filters, counts and the toolbar checkbox follow.
Test: a tracking-only file reads as Partial on the transmittal tab and hides
when Partial is unchecked (51 green).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
ZDDC
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