Task page trail: follow-ups seen while testing

Seen on the live stack while testing Task 7219 (/tasks at 1024 with a task open in the split; 448px). 1. An ellipsised picker crumb ("No fea…") leaves a visible blank before its ▾ on a narrow one-line trail. The ellipsis should sit right against the caret, as on the project crumb. 2. The header's second line reads "Org —" on a task whose org is unset or the operator's. Drop the line when there is no org to name, or say what it is, rather than showing a bare dash. 3. Under the split's own floor (a trail under ~260px, reachable only by forcing widths), the project name falls to "c." while the title keeps its half. Give the first crumb a few-character floor as well, so the project never reads as a single letter. Out of scope: the System chip, the separator placement and the board's age column (Task 7219); the title's floor itself (Task 7179). Done means: - Each item shipped with a test, or declined with a stated reason. - Screenshots at 1024 and 448 of each changed surface.

PR #6016 merged (7f5525c): the picker ellipsis now sits against the ▾ (snap), with geometry tests for the first-crumb floor. Items 2 and 3 landed on develop meanwhile (Tasks 7466/7420). Full gate red only on Python suites outside this diff; web checks green. Visual check done at 1024 and 448. Draft 7405 filed.