v0.4.0 — smart routing, approvals, routines, memory, skills

• Smart dispatcher: one to three relevant employees per message; build requests go to one builder who builds first
• Approvals in the chat (Allow once / Always allow / Deny) with auto-review rules
• Routines: cron schedules + webhook triggers, run history
• Attachments in, preview cards out (HTML, images, PDF)
• Long-term memory per employee, editable
• Skills invoked with /name
• Reply-to, @everyone, Ctrl+K search, unread badges, hide, mark unread, dictation, notifications
• Export/import employees as JSON
• Remote mode (HOST + OPENGROKBOT_TOKEN) and PWA for phones
• Separate offices via OPENGROKBOT_TEAM / OPENGROKBOT_DATA
• English demo assets and a README GIF