[sebenns]

Summary

• Prevent trailing secondary-button release events from dismissing point-anchored context menus.
• Handle release events targeting the document body after the overlay appears.
• Preserve selection, outside-click dismissal, Escape and focus restoration.
• Add a regression that opens the menu while the right button remains pressed.

Verification

• Lint, formatting and strict type checks passed.
• Package validation and consumer builds passed.
• The held-click reproduction was checked in the in-app browser; trackpad behavior was confirmed manually.