apps/web/src/components/ChatView.browser.tsx     | 374 +++++++++++++++++++++++++++++++-
 apps/web/src/components/ComposerPromptEditor.tsx | 332 +++++++++++++++++++++++++++-
 apps/web/src/composer-editor-mentions.test.ts    |  60 ++++-
 apps/web/src/composer-editor-mentions.ts         | 139 ++++++++++--
 4 files changed, 888 insertions(+), 17 deletions(-)