v0.9.0

• The agent's shell and file tools now always run on the host where the CLI runs, never on the Nexora server. Local execution is the default and only behavior.
• Removed the --local-exec flag and the /local command. There is no local/remote toggle anymore.
• The --yolo flag and /yolo command remain: they control whether write and shell commands auto-run or ask for confirmation first. Without yolo you still confirm each write or shell command.
• The status bar no longer shows a LOCAL chip; only YOLO is shown when auto-approve is on.