A chat app's shape: sidebar, a new chat as a chat page, the chat's settings as composer chips

- Sidebar: New chat, search, Scheduled, Files, the chats of both kinds by day (Today, Earlier),
  Settings with the account at the foot; folds away (Ctrl+B), a drawer on a narrow window.
- A new chat is the chat page empty: a greeting, Agent or Chat, and the composer.
- The composer is a card: the text, then attach, the chips (folder and mode for an agent chat,
  model with its picture, effort as the model offers it, the team's size), and a round Send that
  Stop replaces while a reply is written. An open chat's chips change the chat.
- Messages: the person's in a bubble on the right with attached pictures as thumbnails, a reply
  full width; thinking and tool calls as compact rows that unfold.
- Activity: a chip above the composer for every open chat, the panel on the right as before.
- The agent: a chip in the title bar opening its state and the one thing to do about it; "This
  computer is not linked yet" with Link this computer right above the composer of an agent chat,
  and "refused" only with the server's reason.
- Files: a page with the two trees as tabs. Settings: grouped, the groups listed beside them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ui/js/dom.js

@@ -84,6 +84,19 @@ export const ICONS = {
   back: "M10 3.5L5.5 8 10 12.5 11.1 11.4 7.7 8 11.1 4.6z",
   terminal: "M1.5 2.5h13v11h-13zM3 4v8h10V4zM4.2 5.4l2.6 2.6-2.6 2.6-1-1L4.8 8 3.2 6.4zM7.5 10h4v1.5h-4z",
   search: "M7 2a5 5 0 013.95 8.07l3.24 3.24-1.06 1.06-3.24-3.24A5 5 0 117 2zm0 1.5a3.5 3.5 0 100 7 3.5 3.5 0 000-7z",
+  send: "M8 2.25l5.03 5.03-1.06 1.06-3.22-3.22V13.5h-1.5V5.12L4.03 8.34 2.97 7.28z",
+  clock: ["M8 1.5a6.5 6.5 0 110 13 6.5 6.5 0 010-13zM8 3a5 5 0 100 10A5 5 0 008 3z", "M7.25 4.5h1.5v3.19l2.03 2.03-1.06 1.06-2.47-2.47z"],
+  chat: "M2 2.5h12v8.5H7l-3.5 3v-3H2zM3.5 4v5.5h1.5v1.25L6.45 9.5h6.05V4z",
+  bulb: ["M8 1.5a4.5 4.5 0 012.75 8.06v1.94h-5.5V9.56A4.5 4.5 0 018 1.5zM8 3a3 3 0 00-1.83 5.38l.58.45V10h2.5V8.83l.58-.45A3 3 0 008 3z", "M5.75 12.5h4.5V14h-4.5z"],
+  users: ["M6 2.5a2.5 2.5 0 110 5 2.5 2.5 0 010-5zM6 4a1 1 0 100 2 1 1 0 000-2z", "M1.5 13.5c0-2.5 2-4.25 4.5-4.25s4.5 1.75 4.5 4.25H9c0-1.6-1.3-2.75-3-2.75S3 11.9 3 13.5z", "M11 3.5a2 2 0 110 4 2 2 0 010-4z", "M11.75 9.4c1.65.35 2.75 1.85 2.75 4.1H13c0-1.4-.55-2.4-1.6-2.7z"],
+  shield: "M8 1l5.5 2v4.5c0 3.3-2.3 6-5.5 7.5-3.2-1.5-5.5-4.2-5.5-7.5V3zM4 4.05V7.5c0 2.45 1.6 4.6 4 5.85 2.4-1.25 4-3.4 4-5.85V4.05L8 2.6z",
+  link: ["M6.47 8.47l2-2 1.06 1.06-2 2z", "M4.6 7.4l1.06 1.06-1.4 1.4a1.5 1.5 0 002.12 2.12l1.4-1.4 1.06 1.06-1.4 1.4a3 3 0 01-4.24-4.24z", "M11.4 8.6l-1.06-1.06 1.4-1.4a1.5 1.5 0 00-2.12-2.12l-1.4 1.4L7.16 4.36l1.4-1.4a3 3 0 014.24 4.24z"],
+  pause: ["M4.5 3.5H7v9H4.5z", "M9 3.5h2.5v9H9z"],
+  play: "M5 2.75L13 8l-8 5.25z",
+  user: ["M8 2a3 3 0 110 6 3 3 0 010-6zm0 1.5a1.5 1.5 0 100 3 1.5 1.5 0 000-3z", "M2.5 14c0-2.9 2.4-4.75 5.5-4.75S13.5 11.1 13.5 14H12c0-2-1.65-3.25-4-3.25S4 12 4 14z"],
+  check: "M6.5 10.4l6-6 1.06 1.06L6.5 12.53 2.94 8.97 4 7.9z",
+  bell: ["M8 1.5a4.5 4.5 0 014.5 4.5v3l1.5 2.5H2L3.5 9V6A4.5 4.5 0 018 1.5zM8 3a3 3 0 00-3 3v3.42l-.35.58h6.7L11 9.42V6a3 3 0 00-3-3z", "M6.25 12.5h3.5a1.75 1.75 0 01-3.5 0z"],
+  info: ["M8 1.5a6.5 6.5 0 110 13 6.5 6.5 0 010-13zM8 3a5 5 0 100 10A5 5 0 008 3z", "M7.25 7h1.5v4.5h-1.5zM7.25 4.5h1.5V6h-1.5z"],
 }
 
 /** "3 min ago"-style, in the system's language, for a stamp the server sent. */