dsh-inline-comment: Select to annotate in DSH Web Session

dsh-inline-comment is a DSH Web client plugin maintained by proto-commons that creates annotations within a session using a single selection action. Citations and explanations are attached to the end of the composer as a chip and sent with the next message. The model receives normalized citation blocks, while the interface displays only compact capsules, supporting hover preview, sent message echo, Enter/⌘+Ctrl+Enter key switching, and a 320/4000 character limit. The plugin operates exclusively on the client side without any Host-side service and is installed by pointing `plugin_manager install_bundle` to a local checkout.