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.

docs/DATABASE.md

@@ -1004,6 +1004,10 @@ function validateSession(session) {
 
 ## Backup Strategies
 
+### Built-in daily backup (Settings → Data → Daily backup)
+
+Set a folder — best on another disk — and the server writes `agenthub-YYYYMMDD-HHMMSS.db` there once a day at a chosen local hour (default 02:00), keeping the newest 7 (`server/lib/db-backup.js`). It is the `VACUUM INTO` below, run on a read-only connection in a worker thread, so the dashboard keeps serving during the copy. Rotation deletes only those exact file names. To restore: `agenthub stop`, delete `dashboard.db-wal` and `dashboard.db-shm`, copy a backup over `dashboard.db`, `agenthub start`. Routes and settings: [API.md → Daily database backup](./API.md#daily-database-backup).
+
 ### Online Backup (Recommended)
 
 ```sql
@@ -1025,32 +1029,6 @@ cp /var/lib/agenthub/dashboard.db /backups/dashboard_$(date +%Y%m%d).db
 systemctl start agenthub
 ```
 
-### Backup Schedule
-
-```mermaid
-graph TB
-    subgraph "Automated Backups"
-        Daily[Daily Backup<br/>2 AM UTC]
-        Weekly[Weekly Backup<br/>Sunday 2 AM]
-        Monthly[Monthly Backup<br/>1st of month]
-    end
-    
-    subgraph "Retention"
-        Daily --> R7[Keep 7 days]
-        Weekly --> R4[Keep 4 weeks]
-        Monthly --> R12[Keep 12 months]
-    end
-    
-    subgraph "Storage"
-        R7 --> Local[Local Disk]
-        R4 --> S3[AWS S3]
-        R12 --> Glacier[AWS Glacier]
-    end
-    
-    style Daily fill:#3B82F6
-    style S3 fill:#FF9900
-```
-
 ---
 
 ## Summary