Tag labels in the mail row

Jev tags (Receipt, Invoice, Shipping, Travel, Account) plus one user tag with a long German name, Steuererklärung 2026, on seeded dev mail. Both variants use the row chip fill of the count pill (wash, text-micro, ink-2). No colour per tag: Jev creates its tags without a colour. Row heights stay 72 and 64 px.

B. Labels on the sender line (pick)

Pattern: Superhuman and HEY keep the subject line for the text and put labels in the quiet identity line. Two labels from 520 px, one below, then +N. A label caps at 160 px (112 px below 520) and ellipsizes. The label shrinks first; the sender name truncates only after the label reached 48 px (checked at 320 px). At 390 px the subject keeps 202 px and the snippet still starts.

Imbox at 1440 px, variant B: labels after the sender name — 1440 px

A. Labels lead the subject line

Pattern: Gmail puts label chips before the subject. At 390 px the label eats the subject: the ticket row keeps 87 px of subject and no snippet. The chip also sits low against the 15 px subject.

Imbox at 1440 px, variant A: labels before the subject — 1440 px

Plan after the pick

Row labels are not buttons: a click on the row opens the mail. Each extra focus stop in a roving-tabindex list costs keyboard users, and a 44 px hit around an 18 px chip would overlap the sender line.
Reader head: the tags of each expanded message on their own line under the identity row. Each tag is a button that runs tag:<name> in the Imbox search (all folders but Spam and Trash), plus a remove button with a 44 px hit and the name "Remove tag Receipt".
Remove is optimistic. Toast "Tag removed - Z to undo"; Z puts the tag back. Failure: "Couldn't remove the tag", and the tag comes back.