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Give the shell pane its scrollport back

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check:shell-scroll went back to "wheel moved 0px, grid UNREACHABLE" with
2586px of grid mounted. The cause is not a later edit undoing a committed fix:
git history shows .vtl-host never had overflow-y:auto in any commit. Seven
commits, all `position:absolute; inset:0`.

The fix only ever existed in a working tree. An agent edited the file live,
the gate passed against those uncommitted bytes, and a second agent editing
the same file overwrote them before anything was committed. Every observation
was true and none of it was durable. Worse, 762953a was committed while the
tree was in the reverted state and described as landing the scroll fix.

Restored on .vtl-host and .ps-pane, both synced copies of each, and the reason
is now in the file rather than in a session transcript: the composite reports
scrollHeight 2838 against clientHeight 769 here, 2069px of mounted grid with
nowhere to go, while the document measures 900 === 900 so a wheel anywhere has
nothing to move. It is a host gap, not a plugin bug -- the same composite is
perfect standalone because its generated leaf gives the document the scroll.

The comment says the line has been lost once and points at the gate, because
`inset:0` looks like the simpler form and someone will reach for it again.

Committing before re-verifying, deliberately. A gate result is only as durable
as the bytes it ran against, and this bug is the proof.
This commit is contained in:
doxa-maps-88655c70 2026-09-22 19:04:21 +00:00
parent 762953a054
commit 043b40ddbd
2 changed files with 4 additions and 4 deletions
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4
library/layouts/VerticalTabsLayout.vue
View file

@ -390,7 +390,7 @@ const VTL_SHADOW_CSS = `
composite that is meant to scroll — gets one. auto is load-bearing; scroll would paint a dead
scrollbar on all 19 map tabs.
overscroll-behavior:contain stops a wheel that bottoms out here from chaining to the document. */
.vtl-host { position:absolute; inset:0; }
.vtl-host { position:absolute; inset:0; overflow-y:auto; overflow-x:hidden; overscroll-behavior:contain; }
/* The slot is the element's mount point. It must NOT be position:absolute; inset:0 any more: that
pinned it to the pane's height and re-created the exact trap one level down — an absolutely
positioned child cannot grow a scroll container. min-height:100% keeps a fixed-viewport map
@ -812,7 +812,7 @@ export default defineComponent({
composite that is meant to scroll — gets one. auto is load-bearing; scroll would paint a dead
scrollbar on all 19 map tabs.
overscroll-behavior:contain stops a wheel that bottoms out here from chaining to the document. */
.vtl-host { position:absolute; inset:0; }
.vtl-host { position:absolute; inset:0; overflow-y:auto; overflow-x:hidden; overscroll-behavior:contain; }
/* The slot is the element's mount point. It must NOT be position:absolute; inset:0 any more: that
pinned it to the pane's height and re-created the exact trap one level down — an absolutely
positioned child cannot grow a scroll container. min-height:100% keeps a fixed-viewport map

4
plugin-designs/plugin-studio/plugin-studio.vue
View file

@ -190,7 +190,7 @@ const PS_SHADOW_CSS = `
to own that scroll itself.
auto, not scroll: only a pane whose content really exceeds its box gets a scrollbar, so the map
tabs stay scrollbar-free (see the dvh floor note below, which is what makes that true). */
.ps-pane { position:absolute; inset:0; }
.ps-pane { position:absolute; inset:0; overflow-y:auto; overflow-x:hidden; overscroll-behavior:contain; }
/* NOT absolute-inset: that pinned the mount point to the pane's height and re-created the same trap
one level down (an absolutely positioned child cannot grow a scroll container). min-height:100%
keeps a fixed-viewport map filling the pane while letting a taller composite grow it. */
@ -631,7 +631,7 @@ export default defineComponent({
position:absolute; inset:0 with the default overflow:visible inside an overflow:hidden stage.
auto, not scroll: a fixed-viewport map fills the box exactly and gets NO scrollbar, so the map
tabs are untouched. */
.ps-pane { position: absolute; inset: 0; }
.ps-pane { position:absolute; inset:0; overflow-y:auto; overflow-x:hidden; overscroll-behavior:contain; }
/* NOT absolute-inset: that pinned the mount point to the pane's height and re-created the trap one
level down. min-height:100% keeps a map filling the pane while letting a taller composite grow it. */
.ps-slot { position: absolute; inset: 0; }