The app's own interface: agent chats first, two explorers, a viewer

Plain HTML, CSS and ES modules in ui/, no build step. The sidebar opens on agent
chats (this computer first), with chats on the server as the second tab; the
transcript draws the /api/v2 steps, follows a reply as it is written, answers
cards, and starts agent chats in one of the agent's folders. Two explorers kept
apart (this computer's, the server's) and a viewer: Markdown drawn by a safe
renderer that never parses HTML, code in read-only CodeMirror with the server's
token colours, HTML in the sealed frame, show calls opened in it. Settings for
the sign-in, the agent and its folders, notifications and updates; no admin
pages. Layout on fixed and shared tracks; the sidebar is a drawer below 48rem,
the viewer goes over the chat below 64rem. All 124 sentences in the server's
nine languages.

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

ui/js/titlebar.js

@@ -0,0 +1,62 @@
+// The title bar: the app's own, in the page (the window has no system decoration). Moving and
+// double-click maximising come from `data-tauri-drag-region`; the edges resize the window (Tauri
+// does that for an undecorated one); the menu and the agent pill open the app's native menu.
+
+import { $, icon, ICONS } from "./dom.js"
+import { invoke, listen, win } from "./bridge.js"
+
+const WORDS = {
+  off: () => t("agent off"),
+  not_linked: () => t("not linked"),
+  starting: () => t("agent starting…"),
+  running: () => t("agent running"),
+  elsewhere: () => t("agent running (service)"),
+  failed: () => t("agent stopped"),
+  no_folders: () => t("agent: no folders"),
+}
+
+export function renderBar(s) {
+  let host = ""
+  try {
+    host = s.server ? new URL(s.server).host : ""
+  } catch {}
+  $("host").textContent = host
+  $("host").title = s.server || ""
+  // Connected but allowed into no folder: a green light would say it works when it cannot.
+  const noFolders = s.remote && !(s.remote.enabled && s.remote.roots.length)
+  const state = s.agent.state === "running" && noFolders ? "no_folders" : s.agent.state
+  $("agent").dataset.state = state
+  $("agent-text").textContent = WORDS[state] ? WORDS[state]() : state
+  $("agent").title = state === "failed" ? t("Agent stopped: %(why)s", { why: s.agent.detail }) : t("Agent")
+  $("update").hidden = !s.update
+  $("update").textContent = s.update ? t("update %(version)s", { version: s.update }) : t("update")
+  $("update").title = s.update ? t("LLeMbas %(version)s is available (this is %(current)s)", { version: s.update, current: s.version }) : ""
+}
+
+function maximized(on) {
+  const b = $("maximize")
+  b.replaceChildren(icon(on ? ICONS.restore : ICONS.max))
+  b.setAttribute("aria-label", on ? t("Restore") : t("Maximise"))
+  b.title = on ? t("Restore") : t("Maximise")
+}
+
+// The menu opens under the button that was clicked: its bottom-left corner, in page pixels.
+function menuAt(button) {
+  const r = button.getBoundingClientRect()
+  return invoke("titlebar_menu", { x: r.left, y: r.bottom })
+}
+
+export function initBar() {
+  $("minimize").replaceChildren(icon(ICONS.min))
+  $("close").replaceChildren(icon(ICONS.close))
+  $("menu").replaceChildren(icon(ICONS.menu))
+  $("side-toggle").replaceChildren(icon(ICONS.side))
+  $("minimize").addEventListener("click", () => win.minimize())
+  $("maximize").addEventListener("click", () => win.toggleMaximize())
+  $("close").addEventListener("click", () => win.close())
+  $("update").addEventListener("click", () => invoke("update_app"))
+  $("menu").addEventListener("click", (e) => menuAt(e.currentTarget))
+  $("agent").addEventListener("click", (e) => menuAt(e.currentTarget))
+  listen("maximized", (e) => maximized(!!e.payload))
+  win.isMaximized().then(maximized).catch(() => maximized(false))
+}