v0.9.3

Added

• Command autocomplete with ghost text hint while typing
• Autocomplete dropdown (auto-shows while typing, Tab, or Ctrl+Space to trigger)
• Arrow key navigation, Enter/Tab/click to select from dropdown
• Tab on empty input shows all available commands

Fixed

• "Extension context invalidated" error after extension reload (chrome.runtime?.id guard)
• Port reconnect loop stops when extension context is dead