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/lanes/splitDiff.ts

@@ -262,8 +262,8 @@ export function splitDiff({
   collapse?: { margin: number; minSize: number };
   revertLabel: string;
 }): { a: EditorView; b: EditorView; destroy: () => void } {
-  const origDoc = Text.of(original.split("\n"));
-  const chunks0 = Chunk.build(origDoc, Text.of(value.split("\n")));
+  const origDoc = Text.of(original.split(/\r?\n/));
+  const chunks0 = Chunk.build(origDoc, Text.of(value.split(/\r?\n/)));
 
   const root = parent.appendChild(document.createElement("div"));
   root.className = "flex h-full min-h-0";