feat(web): refine overview activity layout

[Cheerego7]

Summary

• Place the overview call trend and recent calls panels in one activity grid.
• Show up to seven recent call providers and keep overflow scrolling inside the recent calls list.
• Add coverage for the recent-call limit and combined activity row markup.

Verification

• npm run fix-check
• npm test -- web/src/overview-page.test.ts
• npm run build --workspace web

[coderabbitai]

Walkthrough

This change increases the recent calls display limit in the overview page from 4 to 7 items, renames the wrapping section CSS class from overview-call-trend-section to overview-activity-grid, and introduces corresponding grid/flexbox layout styles with responsive breakpoints at 1121px and 1120px widths. Tests are added to verify the new 7-item limit and that the call trend and recent calls panels render together within the activity grid.

Possibly related PRs

• oomol-lab/open-connector#57: Both PRs modify the overview-page UI logic/layout for the "call trend" and "recent calls" sections, including recent-calls limiting/rendering and corresponding activity/grid styling.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title follows the required type(scope): subject format and matches the layout-focused changes.
Description check	✅ Passed	The description matches the layout, recent-call limit, and test coverage changes in the PR.

✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch ui/overview-activity-layout

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}