Major Features

• Networking: add EventSource (Server-Sent Events) API support, including named events and
  integration coverage and a use-cases demo page.

Performance Improvements

• Bridge/DOM: avoid style invalidation work when attributes are re-applied without value
  changes (common in React).

Bug Fixes

• Blink/Rendering: defer first paint for newly inserted elements until Blink style-sync starts
  to prevent 1-frame unstyled flashes (FOUC).
• Scrolling: use a custom overflow ScrollController to avoid layout-time ballistic
  simulations that can trigger asserts with some physics.
• Routing: use HybridHistoryDelegate.state() for RouteAware callbacks in WebF and
  WebFRouterView (#855).
• Routing/React: bump @openwebf/react-router to 1.0.1 and align RouterLink with
  @openwebf/react-core-ui component wiring.
• Flexbox: include gap and border-box extents when computing flex scrollable area; add
  regression snapshots.
• CSS/Parsing: accept calc(...) in flex shorthand basis parsing; add integration coverage.
• DOM/Blink: bypass stale CSS batch dirties when Blink is enabled to avoid redundant style
  work.