- Adjusted directory icons to 16px and file icons to 18px for consistency.
- Replaced existing folder icons with Bootstrap's `BsFolder` and `BsFolder2Open`.
- Updated `FileIcon` component to handle directory and file icons with appropriate sizes.
- Modified various components (e.g., `GeneralSettingsPanel`, `PartnerCacheCleanupModal`, `WorkspaceFilesEmptyState`) to use the new `FileIcon` for directory representation.
- Enhanced tests to validate icon sizes and styles in the candidate list and workspace settings.
- Ensured that the mention token lifecycle maintains consistent icon representation during user interactions.