feat: add session rename and delete functionality with validation

- Introduced `SessionRename` model for renaming sessions with validation on name length and content.
- Implemented `rename_session` endpoint in `session_routes.py` to handle session renaming.
- Added `delete_session` endpoint to remove sessions, ensuring proper cleanup of associated data.
- Enhanced `SessionStore` with `rename` and `delete` methods, including validation and transaction management.
- Updated `SessionManager` to manage session renaming and deletion, ensuring live terminal state is preserved.
- Added tests for renaming and deleting sessions, ensuring proper functionality and validation.
- Introduced a new `tool_catalog.py` for managing guest tool selections and installation recipes.

README.md

@@ -346,6 +346,8 @@ The server exposes these routes:
 | `GET` | `/vms/{vm_id}/sessions` | List this VM's saved sessions (Nest) |
 | `POST` | `/vms/{vm_id}/sessions` | Launch a guest terminal; body: `{}` or `{"rows":24,"cols":80}` (Nest) |
 | `GET` | `/vms/{vm_id}/sessions/{session_id}` | Session metadata and status (Nest) |
+| `PATCH` | `/vms/{vm_id}/sessions/{session_id}` | Rename a session; body: `{"name":"Deployment"}` (Nest) |
+| `DELETE` | `/vms/{vm_id}/sessions/{session_id}` | Close the session and delete its saved history; returns 204 (Nest) |
 | `POST` | `/vms/{vm_id}/sessions/{session_id}/close` | End the shell and retain its history (Nest) |
 | `WS` | `/vms/{vm_id}/sessions/{session_id}/terminal` | Authenticated terminal input, output, resize, and replay (Nest) |
 
@@ -379,6 +381,13 @@ output. Navigation, browser reloads, and signing out leave the shell running.
 **End session** closes the shell and its processes. Stopping/restarting the VM
 or the Nest server ends live sessions; their saved history remains available.
 
+Use **Rename** in a history row or the terminal toolbar to give any session a
+custom name. Names are trimmed and accept 1–80 printable characters; they persist
+across reloads and server restarts. The session keeps its identity and shell.
+**Delete** removes a session and its saved terminal output after confirmation,
+closing its shell first if it is active. Both actions are scoped to the session's
+microVM.
+
 Nest stores session metadata and the latest **8 MiB of output per session** in
 `$UVM_BASE/nest/sessions.sqlite3` (default `/var/lib/uvm/nest/sessions.sqlite3`).
 The viewer indicates truncated output. Raw keyboard input is not logged