fix AF-2706, PD-2687
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<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
## Summary by CodeRabbit
* **New Features**
* Added support for mentions in comments and replies, including
detection and notification when users are mentioned.
* Introduced new notification types for comments and comment mentions,
with dedicated notification components and localized messages.
* Enabled navigation directly to specific comments from notifications.
* Sidebar comment tab and comment features now depend on both feature
flags and server support.
* **Improvements**
* Comment creation and reply workflows now support optional mentions.
* Menu configurations for linked widgets can now selectively include
specific menu groups.
* Enhanced navigation helper with a function to jump directly to a page
comment.
* Improved comment entity lifecycle management for proper cleanup.
* **Bug Fixes**
* Improved lifecycle management for comment entities to ensure proper
cleanup.
* **Style**
* Updated mention styling to use a dynamic font size based on theme
variables.
* Adjusted comment preview container underline highlight color.
* **Localization**
* Added English translations for comment and mention notification
messages.
* **Configuration**
* Updated feature flag logic for comment features, making configuration
more flexible and environment-aware.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
#### PR Dependency Tree
* **PR #13000** 👈
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Refactor**
- Streamlined and consolidated block and inline extension exports by removing multiple block-spec and inline extension arrays from public APIs.
- Reduced exported constants, types, and utility functions related to various block and embed features.
- Simplified the codebase by removing deprecated type guards, adapter extensions, and redundant extension groupings.
- **Chores**
- Cleaned up internal APIs by deleting unused exports, imports, and outdated code, enhancing maintainability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Peng Xiao