chore: Upgrade docs next to 15.1.9 (CVE-2025-55182)

[qkraudghgh]

Summary

• Bump docs next from ^15.1.2 to ~15.1.9 (resolves to 15.1.12)
• Applies the CVE-2025-55182 (React2Shell) security patch — a Remote Code Execution vulnerability affecting React Server Components in Next.js 15.0.0 – 16.0.6
• Pinned to the 15.1.x patch range (~15.1.9) to keep the patch surface minimal

Test plan

• CI build passes
• docs site renders correctly

🤖 Generated with Claude Code

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Latest commit: 904062a

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.85%. Comparing base (4619b2f) to head (904062a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #227   +/-   ##
=======================================
  Coverage   99.85%   99.85%           
=======================================
  Files          15       15           
  Lines        1340     1340           
  Branches      262      262           
=======================================
  Hits         1338     1338           
  Misses          2        2           

Components	Coverage Δ
overlay-kit	99.85% <ø> (ø)

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Project	Deployment	Actions	Updated (UTC)
overlay-kit	Ready	Preview, Comment	May 21, 2026 5:07am