[WIP] Replace native button elements with Base UI Button

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

Replace every native <button> element and custom button component with Base UI Button in exactly these files (in this order):

• Chat.tsx
• Sidebar.tsx
• ChatMessage.tsx
• page.tsx

Base UI facts

• Import: import { Button } from '@base-ui/react/button';
• Usage: <Button className="existing-tailwind-classes" type="button" onClick={...} disabled={...}>
• Keep all existing className, props, event handlers, and children unchanged.
• For icon-only buttons, pass Tailwind classes directly (no extra variant prop required).
• Use render prop only if the original element was not a native button.

Mandatory process (apply to each file)

• Read the full current file content first.
• Confirm @base-ui/react is installed; if not, output exact install command.
• Identify every button.
• Perform only the minimal replacement needed.
• Do not change layout, styling, functionality, or add/remove anything else.
• Preserve all Tailwind classes, disabled states, and loading indicators exactly.

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Project	Deployment	Actions	Updated (UTC)
bangs	Ready	Preview, Comment	Feb 24, 2026 7:57pm