fix: use instance-specific pluginKey as transaction meta key in BubbleMenu/FloatingMenu to prevent cross-contamination

[Re-cool]

Changes Overview

When multiple BubbleMenu/FloatingMenu instances use different pluginKey values, all instances respond to any instance's option updates because the transaction meta key is hardcoded as "bubbleMenu"/"floatingMenu" instead of using the provided pluginKey.

Implementation Approach

• BubbleMenuView/FloatingMenuView: Accept pluginKey in constructor and use it in getMeta() instead of hardcoded string
• React BubbleMenu/FloatingMenu: Use pluginKey prop in setMeta() instead of hardcoded string
• FloatingMenu extension: Use this.options.pluginKey in updateFloatingMenuPosition command

Default values remain "bubbleMenu"/"floatingMenu", maintaining full backward compatibility.

Testing Done

• Added 11 new test cases across extension-bubble-menu and extension-floating-menu packages
• Tests cover pluginKey isolation with both string and PluginKey instance types, cross-contamination prevention between instances, command meta key scoping, and backward compatibility with default pluginKey
• Tests verified to fail before the fix and pass after (TDD approach)

Verification Steps

1. Create two BubbleMenu or FloatingMenu instances with different pluginKey values and different options (e.g., different placement)
2. Update one instance's options dynamically
3. Verify the other instance's options remain unchanged

Checklist

• I have created a changeset for this PR if necessary.
• My changes do not break the library.
• I have added tests where applicable.
• I have followed the project guidelines.
• I have fixed any lint issues.

[changeset-bot]

🦋 Changeset detected

Latest commit: 48e29ca

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 72 packages

Name	Type
@tiptap/extension-bubble-menu	Patch
@tiptap/extension-floating-menu	Patch
@tiptap/react	Patch
@tiptap/vue-2	Patch
@tiptap/vue-3	Patch
@tiptap/extension-drag-handle-react	Patch
@tiptap/extension-drag-handle-vue-2	Patch
@tiptap/extension-drag-handle-vue-3	Patch
@tiptap/core	Patch
@tiptap/extension-audio	Patch
@tiptap/extension-blockquote	Patch
@tiptap/extension-bold	Patch
@tiptap/extension-bullet-list	Patch
@tiptap/extension-code-block-lowlight	Patch
@tiptap/extension-code-block	Patch
@tiptap/extension-code	Patch
@tiptap/extension-collaboration-caret	Patch
@tiptap/extension-collaboration	Patch
@tiptap/extension-color	Patch
@tiptap/extension-details	Patch
@tiptap/extension-document	Patch
@tiptap/extension-drag-handle	Patch
@tiptap/extension-emoji	Patch
@tiptap/extension-file-handler	Patch
@tiptap/extension-font-family	Patch
@tiptap/extension-hard-break	Patch
@tiptap/extension-heading	Patch
@tiptap/extension-highlight	Patch
@tiptap/extension-horizontal-rule	Patch
@tiptap/extension-image	Patch
@tiptap/extension-invisible-characters	Patch
@tiptap/extension-italic	Patch
@tiptap/extension-link	Patch
@tiptap/extension-list	Patch
@tiptap/extension-mathematics	Patch
@tiptap/extension-mention	Patch
@tiptap/extension-node-range	Patch
@tiptap/extension-ordered-list	Patch
@tiptap/extension-paragraph	Patch
@tiptap/extension-strike	Patch
@tiptap/extension-subscript	Patch
@tiptap/extension-superscript	Patch
@tiptap/extension-table-of-contents	Patch
@tiptap/extension-table	Patch
@tiptap/extension-text-align	Patch
@tiptap/extension-text-style	Patch
@tiptap/extension-text	Patch
@tiptap/extension-twitch	Patch
@tiptap/extension-typography	Patch
@tiptap/extension-underline	Patch
@tiptap/extension-unique-id	Patch
@tiptap/extension-youtube	Patch
@tiptap/extensions	Patch
@tiptap/html	Patch
@tiptap/markdown	Patch
@tiptap/pm	Patch
@tiptap/starter-kit	Patch
@tiptap/static-renderer	Patch
@tiptap/suggestion	Patch
@tiptap/extension-character-count	Patch
@tiptap/extension-dropcursor	Patch
@tiptap/extension-focus	Patch
@tiptap/extension-gapcursor	Patch
@tiptap/extension-history	Patch
@tiptap/extension-list-item	Patch
@tiptap/extension-list-keymap	Patch
@tiptap/extension-placeholder	Patch
@tiptap/extension-table-cell	Patch
@tiptap/extension-table-header	Patch
@tiptap/extension-table-row	Patch
@tiptap/extension-task-item	Patch
@tiptap/extension-task-list	Patch

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[Re-cool]

This builds on the work in #7445 by scoping the transaction meta key to each instance's pluginKey, so that multiple instances with different pluginKey values can be updated independently.