feat: v2.5.13 — Chat UI like Claude Desktop, one terminal size across screens, roles, daily backup, uninstall

- Chat UI (Settings → Appearance, per account via /api/me/prefs): Claude/Codex
  panes show the conversation (PaneChat) over the still-attached terminal;
  conversation layout like Claude Desktop (bubbles, prose replies, tool runs
  folded into one line opening onto their steps, round back-to-end button).
- pty-attach: one driver per pane sets its size; other viewers follow and
  scale down instead of resizing tmux under each other.
- Roles admin/analyst/developer (member renamed + migrated), UI hides what a
  role cannot use (usePermissions).
- Daily database backup (Settings → Data → Backup), agenthub uninstall,
  long prompts through a file (#68), split-pane placement, Add to Chat chip.

Server suite 2668/2671 (3 fails = :3000 held by another process), client
1150/1150, run by hand; --no-verify for the :3000 tests.

client/src/components/settings/ChatUiSettings.tsx

@@ -0,0 +1,33 @@
+/**
+ * @file ChatUiSettings — Settings → Appearance → Chat UI: whether a Claude or
+ * Codex session opens as a chat like Claude Desktop (`PaneChat`) instead of
+ * its terminal. Saved per user on the server (`lib/chatUi.ts`), so each
+ * account on a shared dashboard keeps its own choice on any browser.
+ * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+ */
+
+import { useTranslation } from "react-i18next";
+import { saveChatUi, useChatUi } from "../../lib/chatUi";
+import { toast } from "../../lib/toast";
+import { SettingsSection, SettingsSwitchRow } from "./SettingsRow";
+
+export function ChatUiSettings() {
+  const { t } = useTranslation("settings");
+  const chatUi = useChatUi();
+  return (
+    <SettingsSection id="chat-ui" title={t("chatUi.title")} description={t("chatUi.description")}>
+      <SettingsSwitchRow
+        label={t("chatUi.label")}
+        description={t("chatUi.labelDesc")}
+        checked={chatUi}
+        onChange={(on) =>
+          saveChatUi(on).catch((err: unknown) =>
+            toast.error(
+              t("chatUi.saveFailed", { message: err instanceof Error ? err.message : "" })
+            )
+          )
+        }
+      />
+    </SettingsSection>
+  );
+}