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/i18n/locales/en/errors.json

@@ -19,15 +19,6 @@
     "sessionError": "Session Error",
     "subagentSpawned": "Subagent Spawned"
   },
-  "toolLegend": {
-    "read": "Read",
-    "write": "Write",
-    "edit": "Edit",
-    "bash": "Bash",
-    "grep": "Grep",
-    "glob": "Glob",
-    "agent": "Agent",
-    "other": "Other"
-  },
-  "badResponse": "The server sent an unexpected response instead of data. The dashboard may be restarting, or a proxy is answering in its place — reload in a moment."
+  "badResponse": "The server sent an unexpected response instead of data. The dashboard may be restarting, or a proxy is answering in its place — reload in a moment.",
+  "adminOnly": "Only an admin can do this. Ask an admin of this AgentHub if you need it."
 }