v0.19.0

Added

• Composer menus on ChatInput, AgentPanel, and AgentChatbox via triggers. A marker such as / or @ opens that item's menu. useChatSuggest reads the live query. ChatSuggestOption inserts a chip.
• inputRef on those three. insertChip adds a chip at the caret (label shown, value sent, optional title and color). focus and clear are on the same handle.
• ChatChip, ChatInputHandle, ChatSuggest, ChatTrigger, ChatSuggestOption, and useChatSuggest from devnonla-ui/chat.

Changed

• ReactCodeSandbox builds its own frame. Pass code only. The frame can import react, devnonla-ui, devnonla-ui/chat, devnonla-ui/markdown, and react-hook-form.
• ReactCodeSandbox showHeader defaults to false.
• MarkdownViewer runs live-react fences when sandbox is set. It no longer takes a runner URL.
• ChatWelcome shows the first letter of the name when avatar is omitted.

Upgrade notes

• Remove AgentAvatar, AgentBody, AGENT_AVATAR_PARTS, AGENT_BODY_PARTS, and their types. Pass any node as avatar, or omit it for the letter.
• Replace sandboxSrc="/sandbox.html" with sandbox. Drop the host page that called mountReactCodeRunner.
• Drop src on ReactCodeSandbox. Pass showHeader where you still want the Preview / Code bar.