createTimelineView

Description#

Derives the whole body switch from one bound state. No second state machine, no boolean fallback inputs - every branch is a computed() over resolveAsyncView, the same lookup table the rest of cngx switches on.

Two cases the lookup table does not cover on its own:

• No state bound. The timeline is then a plain list over [items], but an empty one still has to reach the empty surface; otherwise *cngxTimelineEmpty would be unreachable on the synchronous path.
• The announcement. Only loading and refreshing have anything to say, and the string is empty otherwise so the live region stays in the DOM while staying silent.
• Busy with an empty screen. The lookup table resolves a non-first-load loading or pending to content; with no rows that renders nothing at all, so it is treated as a load instead. refreshing keeps its tail.
• First-load busy over seed rows. The lookup table resolves a first load to skeleton unconditionally, but [items] documents seed rows as a legitimate companion to a bound state - rows that exist are painted, never hidden behind placeholders. aria-busy still marks the list.

Swap the whole mapping through CNGX_TIMELINE_VIEW_FACTORY rather than forking the organism - treating pending as content, or holding the skeleton through a refresh, is a per-app decision.