Introduce the x-icon custom element and migrate first-party WebUI and bundled plugin markup while retaining legacy Material icon compatibility. Defer icon-font readiness until the splash-installed document is parsed so Firefox does not leave icons transparent. Centralize chat message collapse handling, avoid false Show More controls on short user messages, and align grouped-message pagination styling. Update DOX and add regression coverage for the icon and collapse behavior.
Introduce the _commands plugin with command storage, picker UI, bundled canonical command pack, and legacy migration into the built-in namespace.
Polish the Web UI picker behavior, hide WebUI-only-inappropriate commands from the popover, make /models always open model configuration, and add regression coverage for command CRUD, plugin discovery, migration, canonical names, hidden commands, and picker flows.
