Add disconnect command and fix GUI connection status refresh

- Add `cmdforge config disconnect` command to clear registry token
- Fix GUI connection status label not updating after connect
  - Store status as instance variable instead of local
  - Add _update_connection_status() method
  - Call update after connect dialog completes

Co-Authored-By: Claude Opus 4.5 <[email protected]>

src/cmdforge/cli/__init__.py

@@ -255,6 +255,10 @@ def main():
     p_cfg_connect.add_argument("username", help="Your CmdForge username")
     p_cfg_connect.set_defaults(func=cmd_config)
 
+    # config disconnect
+    p_cfg_disconnect = config_sub.add_parser("disconnect", help="Disconnect from registry (clear token)")
+    p_cfg_disconnect.set_defaults(func=cmd_config)
+
     # Default for config with no subcommand
     p_config.set_defaults(func=lambda args: cmd_config(args) if args.config_cmd else (setattr(args, 'config_cmd', 'show') or cmd_config(args)))
 

src/cmdforge/cli/config_commands.py

@@ -17,10 +17,13 @@ def cmd_config(args):
         return _cmd_config_set(args)
     elif args.config_cmd == "connect":
         return _cmd_config_connect(args)
+    elif args.config_cmd == "disconnect":
+        return _cmd_config_disconnect(args)
     else:
         print("Config commands:")
         print("  show                 Show current configuration")
         print("  connect <username>   Connect this app to your CmdForge account")
+        print("  disconnect           Disconnect from registry (clear token)")
         print("  set-token <token>    Set registry authentication token")
         print("  set <key> <value>    Set a configuration value")
         return 0
@@ -165,3 +168,18 @@ def _cmd_config_connect(args):
     except KeyboardInterrupt:
         print("\n\nConnection cancelled.")
         return 1
+
+
+def _cmd_config_disconnect(args):
+    """Disconnect from registry by clearing the token."""
+    config = load_config()
+
+    if not config.registry.token:
+        print("Not connected to registry (no token set).")
+        return 0
+
+    # Clear the token
+    set_registry_token(None)
+    print("Disconnected from registry.")
+    print("Token has been cleared from local configuration.")
+    return 0