chore: bump version to 4.12.0-rc2

[Yeraze]

Summary

Bumps the version from 4.12.0-rc1 → 4.12.0-rc2 across all five version files:

• package.json
• package-lock.json (regenerated — version lines only, no dependency churn)
• helm/meshmonitor/Chart.yaml (version + appVersion)
• desktop/package.json
• desktop/src-tauri/tauri.conf.json

Routine release-candidate bump; no functional changes.

🤖 Generated with Claude Code

[github-actions]

Claude finished @Yeraze's task —— View job

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PR Review: chore: bump version to 4.12.0-rc2

Tasks:

• Gather context and understand the PR
• Review changed files for consistency and correctness
• Post final review feedback

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Review Summary

This is a straightforward version bump PR with no functional changes. All five required files (per the CLAUDE.md versioning instructions) have been updated consistently.

Version consistency check:

File	Version
package.json	✅ 4.12.0-rc2
package-lock.json	✅ 4.12.0-rc2 (both root + named package entries)
helm/meshmonitor/Chart.yaml (version)	✅ 4.12.0-rc2
helm/meshmonitor/Chart.yaml (appVersion)	✅ 4.12.0-rc2
desktop/package.json	✅ 4.12.0-rc2
desktop/src-tauri/tauri.conf.json	✅ 4.12.0-rc2

Code quality / best practices: No issues — all five files required by the project's versioning conventions are updated correctly.

Potential bugs: None. The package-lock.json contains exactly 2 updated version lines (root + named workspace reference), with no unintended dependency churn.

Performance / security: N/A — no code changes.

Test coverage: N/A — no logic changes to test.

Verdict: LGTM. Routine RC bump, all files consistent. ✅