Starred Messages Chat Block for Ark UI

Everything. The stars are a list of message ids in the page's state, the thread and the sample replies are typed, and nothing is sent. To wire it for real, save and remove a star per user from the star function and load the starred ids with the thread; the filter, the counts and the gap lines are derived from the two lists.

Entering Starred takes a snapshot of the starred ids and shows those messages in thread order. Unstarring one inside the view leaves it in place with an empty star until you leave, so the list never jumps under your hand; the count in the switch updates at once. Leaving and coming back shows only what is starred now.

It switches to All, scrolls the log so the message is near the top, and draws a ring around it, using the region's own scroll position so the page never moves. The status line says "Showing the message in context." The ring goes when you switch views or send.

A count of the messages that the filter hides between one starred message and the next, such as "2 messages in between", and for the last one how many come after it. They are derived from the thread, so a new message from Bruno changes the last line.

Each star is a real button with a name that includes the sender and the time, and it reports pressed or not. The word Starred under a starred message says the same in text. The log is a focusable region announced as a log, and the switch is a labelled group.

The stars are always visible instead of on hover, the avatar leaves the top bar to make room for the switch, and the gap lines and Show in context buttons keep to the column. The window keeps its height and only the log scrolls.