[httpsphl]

Makes the chat quieter, as in the Claude desktop app.

What changes

• Tool calls fold into one line. While the bot works on them, the line names the call it is on (a spinner and a light sweeping across the name) and swaps, rising, with each new call; the three dots under it go away. When the bot writes, asks or stops, the line becomes a summary by kind, in order, failures last: "Took 3 steps in the browser, ran 1 command (1 failed)". The arrow opens every call, each with its own line as before. A single finished call keeps its own line.
• Routine messages show only the routine's name. The tag "Routine · " gets an arrow and opens the prompt the routine sent.
• Mentions stand out. A handle like @writer reads in light blue in replies and messages (new --mention token, 4.5:1 in both themes, checked by the token test). E-mails, paths, code and links are left alone.

The panel buttons on a line (show in files, browser, screens) now sit inside the opened group; their tests open it first. Spec 15.3 and 20 updated. With less motion, the name of the current call stands still.

Manual test with the real Claude Code

1. Give a bot a task that runs several tools in a row (read files, run commands, open a page).
2. Watch the chat while it works: one line that changes with each call, no dots under it.
3. When it replies, the line is a short summary; the arrow opens all the calls.
4. Run a routine now: the chat shows only "Routine · " with an arrow, which opens the prompt.
5. Ask a bot to mention another one: the @handle is light blue.