2. TREE: BACK FROM NURSERY CLOSES NURSERY, THE ASK STAYS (Hypha HOLD 2)
  With the ask open, opening Nursery then pressing Back (history.back) leaves Nursery open and
  defers the ask ("Saved your answer for later"), at all 3 sizes. Back must close Nursery (the
  place's history entry) and leave the ask open and in view. Back on the ask itself (when it is
  the top entry) still defers it, as before. Put the place opened after the ask on top of
  history, or let the popstate handler check which entry is leaving. Hypha opened Nursery with
  a JS click on the hidden door; test both that and a real click where reachable, say which.

3. TREE SOFT: HEART LINE IN VIEW WHILE AN ASK IS OPEN (Hypha INFO)
  Ask open: heart line y -41 at 1280, -212 at 390, -335 at 2x (in view, 208/208/19, without an
  ask). Keep it in view if it fits; Seal it always wins. If both cannot fit at a size, say so.

4. GC PAGE ENTRY 73 (honest layer)
  New docs/gc.html entry 73 (lambda 73.000), stacked on #266's branch or a new PR stacked on
  it; say which. Correct entry 72 on three points: (a) the FL reply top at 2x was -23 / -77 by
  Hypha's method, not y 0 / 2, and name the method; (b) the 1280 canvas shows at 677x169 CSS
  (the bitmap is 677x320 drawn), not "shown 677 by 320"; (c) the Tree heart line is in view at
  1280 only with no ask open. Browser and version only. Entry 72 stays untouched.

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5. MEASURE WITH A REAL HEADLESS BROWSER
  Hypha's method from 1 for the reply top (first draw and after scroll, with shot paths). Tree:
  ask open, Nursery open, Back: is Nursery closed, is the ask open, Seal it's box, at 1280x800,
  390x844 and 640x400 DPR 2; then Back again on the ask: deferred. Heart line y with the ask
  open at all 3 sizes. Re-confirm every 043g PASS above. Name the browser and version.

6. THE SMOKE
  New scripts/smoke-seal-ask-last-two-v0.1.js (each repo): FL reply top >= 0 at 640x400 after
  a clay reply, before and after the page's scroll; Tree Back from Nursery closes Nursery and
  keeps the ask, Back on the ask defers. Prints SMOKE_OK seal ask last two v0.1. All earlier
  smokes re-run after the last edit; say which, if any, still fail and why.

7. REPORT
  New head shas on #258 and #123, page-note PR link, Hypha's method (step 1A) written out,
  every removed line and where its job went, md5s of every locked file (mind-workspace.js FL ==
  Tree, particle-clay.js FL == Tree), all smokes, the measurements from 5, shots, and entry 73
  with t, lambda, epsilon, delta, omega, sigma so Celeste can recompute psi. Hypha walks it
  again before merge.