`RovingGridController.measureColumns` read `offsetTop`, and every card
in these grids is drawn by a `lit-virtualizer`, which positions its
children with a transform — which `offsetTop` does not see. So all of
them reported 0, every rendered card counted as one row, and ArrowDown
was `min(i + everything, last)` while ArrowUp was `max(i - everything,
0)`: the vertical arrows have been End and Home in the albums, artists
and genres grids since the day this was written. At 700x700 with three
real rows of 3/3/2, ArrowDown from card 0 landed on card 7.
Two things behind it, both only visible once the grid splits:
`cover-grid`'s scrollToIndex was `querySelector('lit-virtualizer')` —
always `#grid-before` — while the roving index spans the whole album
list, so with a dropdown open End scrolled the wrong half to an index
it does not contain. It now picks the half that holds the index and
rebases it.
And the focus is retried on a deadline rather than taken once at the
host's `updateComplete`: a scroll of 5 000 rows produces the card a few
hundred ms later, so the tab stop moved and nothing took focus, which
looks exactly like the key not being handled.
Also waits for the virtualizer in album-dropdown.spec's expandCard,
which flaked on roughly one run in two on main.
`index.ts` caches primary views and hides them with a class so
scrollTop survives navigation. Nothing else was told: `disconnectedCallback`
never fires for one, so everything written to clean up there never
cleans up. The worst case was not a leak — pressing `s` on Settings
skipped two albums out of the Autotag queue, and `a` on that same live
handler rewrites tags on disk.
- `utils/view-lifecycle.ts` is the missing half: `viewActivated` /
`viewDeactivated`, with `listenWhileActive`, `intervalWhileActive`
and `whileActive` torn down on the way out, and an off-screen view
that does not render. `registerViewAware` gives a shared reactive
controller the same treatment, because a controller cannot know
whether its host is a cached view — `ContextMenuController` bound
three document listeners in `hostConnected`, which for a cached host
is "forever".
- `services/shortcut-scope.ts` publishes the ambient scope. Resolving
scope from focus alone was not enough: this app is driven with the
mouse, focus sits on `<body>`, and a focus-only rule would have made
the panel keys work only after a click landed inside the panel.
- Global bindings yield to a focused control that owns the key —
button, select, slider, checkbox, menu, grid row, or anything inside
an open dialog — so the unmodified single-key bindings stop stealing
Space and the arrows.
- `utils/roving-grid.ts` gives a card grid one tab stop moved with the
arrows, since a card per tab stop makes a library-length tab
sequence.
logan