fix: explorer dependency vulnerability

[jpraynaud]

Content

This PR includes a fix for a dependency of the explorer website.

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[Copilot]

Pull request overview

This PR updates the mithril-explorer package dependencies to address a security vulnerability. The changes consist of patch-level updates to Next.js, React, and related tooling dependencies, with the explorer version bumped from 0.7.42 to 0.7.43.

Key changes:

• Next.js framework updated from 16.0.6 to 16.0.7
• React and React-DOM updated from 19.2.0 to 19.2.1
• Developer tooling updates (eslint-config-next, prettier)

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
mithril-explorer/package.json	Bumps explorer version to 0.7.43 and updates dependency versions for Next.js, React, React-DOM, eslint-config-next, and prettier
mithril-explorer/package-lock.json	Updates lockfile to reflect new dependency versions and removes obsolete transitive dependencies

Files not reviewed (1)

• mithril-explorer/package-lock.json: Language not supported

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Test Results

    4 files  ±0    168 suites  ±0   22m 55s ⏱️ - 1m 7s
2 223 tests ±0  2 223 ✅ ±0  0 💤 ±0  0 ❌ ±0 
6 933 runs  ±0  6 933 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 03385ea. ± Comparison against base commit c352749.