Icon-only buttons have no accessible name and status dots are colour-only

[charlesrhoward]

Problem

Twelve icon-only buttons have no aria-label, title or visually hidden text. Screen readers announce them as "button". Several status indicators are a coloured dot with no text alternative. One dialog has no title.

Where

Buttons (line numbers approximate, search for the icon-only <button or <Button nearby):

• components/ai-elements/code-block.tsx:504 (copy)
• components/ai-elements/terminal.tsx:150,179
• components/ai-elements/conversation.tsx:92,160 (scroll to bottom)
• components/ai-elements/commit.tsx:261
• components/ai-elements/queue.tsx:132
• components/ai-elements/stack-trace.tsx:356
• components/ai-elements/environment-variables.tsx:305
• components/panes/flows-pane/inspector-start.tsx:198
• components/ui/sidebar.tsx:213
• components/ui/calendar.tsx:188

Colour-only status:

• components/command-palette.tsx:318,336 (green dot for running)
• components/sandbox-chip.tsx:19-20
• components/chat/mcp-status-button.tsx:16-23

Dialog:

• components/panes/flow-run-details.tsx renders DialogContent without a DialogTitle.

Fix

1. Add an aria-label describing the action to each button ("Copy code", "Scroll to bottom", and so on).
2. Give each status dot a sibling <span className="sr-only">Running</span> or an aria-label on the dot, and add role="status" where the state changes live.
3. Add a DialogTitle (visually hidden is fine) to the flow-run-details dialog.

Exit criteria

• Playwright spec tests/e2e/a11y-names.spec.ts: on /control and the workspace page, assert getByRole("button", { name: "Copy code" }) (and one name per fixed component that renders there) resolves, and assert the running-sandbox indicator has an accessible status text.
• Running the app with axe DevTools on /control and the workspace page reports zero "Buttons must have discernible text" and zero "Dialog must have a title" violations. Post the summary in the PR.
• pnpm lint, pnpm typecheck, pnpm test pass.

https://claude.ai/code/session_01SQ4nS96XYRztd5w9QkubPf