Add PrestaShop 8.2 and 9.1 compatibility and release tooling

[PrestaSafe]

Summary

This prepares PrettyBlocks 3.2.1 as a focused compatibility release for the maintained 3.x line.

• support clean development and release tests on PrestaShop 8.2.7 and 9.1.4
• fix Symfony/admin URL generation across PrestaShop 8 and 9
• fix the PrestaShop 9 editor iframe URL
• fix the iframe loading race that could leave the editor on “Loading in progress”
• generate a fresh instance_id when cloning blocks across languages
• add a reproducible Docker release builder and local packaged-release tests
• build an installable ZIP automatically on pull requests and pushes to main
• bump the module version from 3.2.0 to 3.2.1

No v4 work is included in this pull request.

Why

PrettyBlocks 3.2.0 assumed URL and iframe behavior that differs between PrestaShop 8 and 9. The iframe load listener could also be registered after the document had already loaded, leaving the loader visible indefinitely.

The previous release workflow did not validate the final ZIP as an installed module. The new workflow builds production dependencies and frontend assets in Docker, validates the archive, and makes the same process available locally.

Contributors

This branch incorporates the focused fixes proposed by:

• @PrestaEdit in Fix domain assignment logic in getSFUrl method #328 — domain assignment in getSFUrl()
• @bc-devle in fix(app) : instance_id duplicates on clone button #342 — unique instance_id when cloning a block

Their original Git authorship is preserved in the commit history.

Validation

• scripts/build-release.sh
• PS82_RELEASE_PORT=8282 PS91_RELEASE_PORT=8291 scripts/test-release.sh
• PrestaShop 8.2.7 / PHP 8.1.33 / PrettyBlocks 3.2.1
• PrestaShop 9.1.4 / PHP 8.5.0 / PrettyBlocks 3.2.1
• production Composer dependency present and development dependencies excluded
• PHP syntax validated throughout the packaged module
• built frontend assets fetched successfully from both clean installations
• editor iframe and AJAX loading flow manually verified

Generated package: prettyblocks-3.2.1.zip
SHA-256: 0b115fba49191a9b94d3852004654a2627bf3211e9c6c3c7bcb32beca2dfe2b2