## Summary - reuse the visible Decisions heading as the workspace region label and focus target - remove the duplicate screen-reader-only level-two heading without changing visual design or copy

## Verification - `bun test` — 843 passed, 2 skipped - `bun run types` - `bun run ci` - `bun run build` - `E2E_SKIP_BUILD=1 bun scripts/e2e.ts e2e/sidecar.e2e.ts e2e/responsive-workspace.e2e.ts --grep "desktop document view|390px phone"` — 2 passed