feat: add notes count badge to header

[IgnorancePulls]

Summary

• Adds a small badge next to the "Notes" heading showing total number of notes
• Hidden when there are no notes

Test plan

• Create a few notes — badge appears with correct count
• Delete all notes — badge disappears

🤖 Generated with Claude Code

[deepsource-io]

DeepSource Code Review

We reviewed changes in 48e3ab0...8cbdde2 on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

See full review on DeepSource ↗

Important

Some issues found as part of this review are outside of the diff in this pull request and aren't shown in the inline review comments due to GitHub's API limitations. You can see those issues on the DeepSource dashboard.

PR Report Card

Overall Grade

Security   Reliability   Complexity   Hygiene   Coverage

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
JavaScript		Mar 24, 2026 9:40a.m.	Review ↗
Secrets		Mar 24, 2026 9:40a.m.	Review ↗
Test coverage		Mar 24, 2026 9:40a.m.	Review ↗

Code Coverage Summary

Language	Line Coverage (Overall)
Aggregate	100%
Javascript	100%

➟ Additional coverage metrics may have been reported. See full coverage report ↗