- Add version column to registered_agents table
- Agents send version on registration (Linux 3.1, Windows 3.0, macOS 3.0)
- workers_list API returns latest_versions per platform
- Workers tab: VERSION column with green check (up-to-date) or red (outdated)
- Outdated agents highlight row and show blue UPDATE button
- Up-to-date agents show dimmed UPDATE button
- Update button dispatches update command immediately
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Previously agents only registered when api_key was missing (first run).
After updating to v3.0 with screenshot capability, restarted agents never
refreshed their capabilities in the DB. Now register() is called every
startup — server does UPDATE on existing agent_id so api_key is preserved.
self_update(cfg) and shell allow_shell_commands check both referenced cfg
from run() scope, but execute_command() is a standalone function. Fixed by
calling load_config() locally in each branch that needs it.
myron