🐛 Reset note detail scroll on route changes

[baealex]

🎯 Goal

• Prevent detail pages from inheriting the previous list scroll position when navigating from a scrolled note list.
• Keep route-specific scroll restoration for paths that already have a saved position.

🛠️ Core Changes

• Reset the parent scroll container to the top when the next route has no saved scroll position.
• Added coverage for resetting new routes and restoring previously saved routes.

🧠 Key Decisions

• Kept the existing path-based scroll memory behavior.
• Changed only the missing fallback behavior so new routes start at the top instead of reusing the current container position.

🧪 Verification Guide

How to verify

1. Run pnpm --filter @ocean-brain/client lint.
2. Run pnpm --filter @ocean-brain/client type-check.
3. Run pnpm --filter @ocean-brain/client test -- RestoreParentScroll.spec.tsx --run.

Expected result

• Lint passes.
• Type-check passes.
• Scroll restoration tests pass.

✅ Checklist

• Lint completed
• Type-check completed
• Tests completed
• Documentation updated (if needed)