[DeyangChan]

What this changes

Fixes the canvas jumping to the top of a long page. If a reviewer had scrolled down and the page then changed height, fitFrameHeight shrank the frame, which clamped the canvas scroll to 0.

• The scroll is now read before the frame shrinks and restored afterwards. The modal path in the same function already does this.
• New scenario F4 in e2e/features/framing.feature covers it.

The version goes to 6.9.1, because this is a fix.

How it was tested

• F4 failed without the fix: the canvas was at 1500 and is now at 0. It passes with the fix.
• The full Gherkin suite passes under both hosts: 45 scenarios under Claude and 45 under Codex.
• The six review test suites, the proofread tests, the shell check, and both manifest validations pass locally.

This drives the shipped workspace in headless Chromium through the e2e suite, with a mock agent in the agent's seat. It was not run through a live agent session.

Checklist

• Nothing writes outside the user's project, and nothing transmits anywhere.
• Pages stay self-contained. No external requests at runtime.
• Changed something under plugins/, and raised version in both host manifests with a matching CHANGELOG.md entry. Merging this publishes it.
• The security scans that run locally pass, and no finding was silenced.
• Installed the plugin from this branch and drove the affected skill end to end. The e2e suite covers the workspace, but no live agent session was run.

🤖 Generated with Claude Code