chore: correct version to 3.12.0

[fernandotonon]

The #409 PR (#762) over-bumped the project version to 3.13.0. The correct next release after 3.11.0 is 3.12.0 (3.12.0 was never released). This corrects CMakeLists.txt and re-syncs the pinned doc references via scripts/sync-doc-versions-from-cmake.sh.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated the project and documentation references to use version 3.12.0.
  • Aligned CI/CD examples and workflow references with the new pinned version.
  • Updated the default fallback reference shown in the web app to match 3.12.0.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e58dd63d-19d2-4360-9894-dc6128d65d5c

📥 Commits

Reviewing files that changed from the base of the PR and between e829790 and 707dab6.

📒 Files selected for processing (3)

• CMakeLists.txt
• README.md
• website/src/hooks/useQtmeshActionRef.js

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📝 Walkthrough

Walkthrough

The project version is downgraded from 3.13.0 to 3.12.0 across CMakeLists.txt, all pinned GitHub Actions references and image-tag values in README.md, and the QTMESH_ACTION_REF_FALLBACK constant in the website hook.

Version downgrade 3.13.0 → 3.12.0

Layer / File(s)	Summary
Version downgrade in CMake, README, and website hook CMakeLists.txt, README.md, website/src/hooks/useQtmeshActionRef.js	PROJECT_VERSION in CMake, all pinned action references and image-tag values in README CI examples, and the QTMESH_ACTION_REF_FALLBACK constant are all changed from 3.13.0 to 3.12.0.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• fernandotonon/QtMeshEditor#495: Performs the same pattern of syncing CMakeLists.txt project version with README.md pins and the useQtmeshActionRef.js fallback reference.
• fernandotonon/QtMeshEditor#503: Identical set of files edited for an aligned version bump of the same fernandotonon/QtMeshEditor@… reference.
• fernandotonon/QtMeshEditor#184: Also modifies CMakeLists.txt's project(...) version declaration that feeds QTMESHEDITOR_VERSION_STRING.

Poem

🐇 Hopping back a step with care,
From thirteen down to twelve we dare,
The version tag now reads just right,
A tiny leap, a small rewrite.
All pinned in sync, the build is bright! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the version fix, but it does not follow the required template sections or include the requested technical summary bullets.	Rewrite the PR description using the repository template: add Summary, Technical Details, and fill or explicitly mark the PS1 runtime rip, Features, and Bugfixes sections.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: correcting the project version to 3.12.0.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/version-3.12.0

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud