* feat(icons): add search field for icon selection
* fix(icons): address review suggestions on the icon picker
* fix(goals): prevent the icon picker popover from collapsing
`updatePopupPosition` sets `bottom: 0px` when the popover would run past
the fold,
but never clears Tailwind's `top-full`.
With both offsets set and `height: auto`, CSS derives the height from
the offsets
instead of the content, collapsing the popover to 26px.
This PR is what makes it reachable: the search row (42px plus an 8px gap)
and the grid going max-h-40 -> max-h-52 grow the popover ~98px, moving the
overflow trigger point far enough to hit standalone /goals/new at 1280x800.
`h-fit` makes the height non-auto, so the over-constraint resolves by
ignoring `bottom`,
which is why categories, already carrying it, was never affected.
Victor Dusart