fix(context-menu): open editor menu on right-click over resize overlays

[dawidbudaszewski]

Summary

Right-clicking on a table (or image) sometimes shows the browser's native context menu instead of SuperDoc's editor menu — reproducible whenever the blue resize handles are under the cursor. This makes actions like Edit table unreachable in that spot.
Before:

After:

Root cause

The table/image resize overlays (.superdoc-table-resize-overlay / .superdoc-image-resize-overlay, rendered by TableResizeOverlay.vue / ImageResizeOverlay.vue) are mounted as siblings of the editor surface, not inside it:

<div class="super-editor">
  <div class="editor-element …">         ← editor surface (getEditorSurfaceElement)
  <ContextMenu />
  <div class="superdoc-table-resize-overlay">  ← sibling, holds the resize handles

ContextMenu.vue's isEventWithinContextMenuTargets() only treats the editor surface and the ProseMirror view DOM as in-editor. So when a right-click lands on a resize handle, handleRightClick bails early, never calls event.preventDefault(), and the native menu wins. (The ProseMirror handleDOMEvents.contextmenu and the PresentationInputBridge forwarder also skip it for the same reason.)

Fix

Treat targets within the resize overlays as in-editor. Added a small pure helper isWithinResizeOverlay(target) in contextmenu-helpers.js and used it in isEventWithinContextMenuTargets(). Because the menu context (position, isInTable, etc.) is resolved from the cursor coordinates (getEditorContext → posAtCoords), the correct items (e.g. Edit table) are shown even though the DOM target is the overlay handle.

Testing

• pnpm exec vitest run for the context-menu suite — all pass (165), including 3 new unit tests for isWithinResizeOverlay.
• Prettier clean; ESLint clean.
• Manually verified in an editor build: right-clicking directly on the blue resize handles now opens the SuperDoc context menu with the table actions.

Made with Cursor

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[chatgpt-codex-connector]

Scope resize overlay checks to this editor

When multiple SuperDoc editors are mounted, each ContextMenu instance has document-level contextmenu listeners, but this new early return treats any .superdoc-table-resize-overlay or .superdoc-image-resize-overlay in the document as belonging to this editor. Right-clicking a resize handle in editor A will therefore also make editor B's handler run, call preventDefault(), dispatch/open against editor B using editor A's coordinates, and potentially focus or show a stale menu for the wrong instance. Please only accept overlays associated with this ContextMenu's own .super-editor/surface before returning true.

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[shri-scale]

Looks good