Retires the fixed bottom-left plan window (which sat ON the sidebar and
bled into the session). Two placements replace it, per the owner's
lock-in:
- The plan chip in the top bar beside the phase chip — session-level
structure beside session state; opens the full-DAG popup; present at
every width; the access point.
- The plan marginalia: the BARE diagram (no card, no border, no shadow)
in the dock band's right flank — marginalia on the lesson's page, not a
floating widget. The band's reserved height (tall while a quiz is
open) is its canvas; meet-fitted (PlanDiagram's new fill mode) so it
fits both the flank's width and the band's height; live statuses +
the yellow current-node glow; click opens the popup. Mounted only
while a question owns the band — composer mode keeps the reading
view pristine. Folding the dock fades + blurs it out of existence
(300ms), returning to the bottom fades it back in. Rendered only when
the flank holds a real diagram (>= 240px); narrower windows keep the
chip alone.
Files: chat.tsx (chip, DockOverlay marginalia wrapper + flank measure,
PlanWindow removed), plan-window.tsx (PlanWindow → PlanMarginalia),
plan-block.tsx (PlanDiagram fill prop: h-full w-full meet-fit),
tests/plan-window.test.tsx (rewritten for the marginalia).
amosblomqvist
93033fac77