The phone's top bar is about to go, and the search box is the one thing
in it that is an action rather than chrome. It becomes a button in the
row that already says which page you are on, opening a wa-dialog with
the real search box in it.
Three decisions worth the words.
**A wa-dialog, and that is a mechanism rather than a taste.** wa-popup
renders `<div popover="manual">` and feature-detects the Popover API,
falling back to `strategy: "fixed"` where there is none -- which is
Chrome 113, the reference device, since `popover` is Chrome 114. And
`position: fixed` escapes ancestor overflow but not `contain: paint`,
which `.main-panel` carries, so a popup-shaped search panel opened from
a view's header is structurally clipped on that device. `<dialog>` /
`showModal()` is Chrome 37 and uses the real top layer. No tier here can
see the difference -- CI's Chromium and WebKit both have the Popover
API -- so the component test asserts the *mechanism*, a native
`<dialog>` in the tree, rather than the symptom.
**An element, not a PageAction.** Two of the seven searchable views are
detail views with no page-header; they filter on the term and say so in
their own headers. Declaring search as an action would mean seven hosts
each writing it out, which is a second list of searchable views, and it
would put a phone mode for actions inside page-header, which that
component documents its refusal to grow. search-store's own map is the
condition, asked by one component placed three times.
**The modal carries the real search-bar**, so there is still one
debounce, one clear button and one view-scoped placeholder. Escape
closes it and *keeps* the term -- the input treats Escape as "clear the
search", which is right in a header where the box stays on screen and
wrong in a surface whose dismissal would then discard the search.
