[lexical-react] Bug Fix: Fall back to root node in NodeContextMenuPlugin when click target has no Lexical node

[mayrang]

Description

Fixes #8257

NodeContextMenuPlugin always calls preventDefault() on contextmenu events, but when right-clicking on "empty" editor chrome (placeholder, padding, or DOM that doesn't map to a Lexical node), $getNearestNodeFromDOMNode returns null. This results in an empty custom menu while the native context menu is suppressed.

As suggested by @etrepum in #8257, this falls back to $getRoot() when no node is found:

- const node = $getNearestNodeFromDOMNode(e.target as Element);
+ const node = $getNearestNodeFromDOMNode(e.target as Element) ?? $getRoot();

This means:

• Right-clicking on text/blocks works exactly as before ($getRoot() fallback is never reached)
• Right-clicking on empty areas now uses the root node for $showOn filtering, so items without $showOn (e.g. Paste) are shown instead of an empty menu
• No changes to the plugin's public API

Test Plan

1. Open the Lexical playground
2. Right-click on text inside the editor → context menu shows items as before
3. Right-click on the placeholder or empty padding below content → Before: empty menu appears, native menu suppressed. After: menu shows applicable items (e.g. Paste)

[meta-cla]

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Project	Deployment	Actions	Updated (UTC)
lexical	Ready	Preview, Comment	Apr 24, 2026 4:38am
lexical-playground	Ready	Preview, Comment	Apr 24, 2026 4:38am

[meta-cla]

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[etrepum]

Failing pnpm run ci-check

[mayrang]

Sorry, missed running Prettier before pushing. Fixed now.

[etrepum]

As a first time contributor your checks don't run until a maintainer clicks an approval button, adding empty commits won't help anything.

[mayrang]

Got it, thanks for letting me know! I wasn't aware that first-time contributors need manual approval for CI. Sorry for the unnecessary commit.