Kleine Verbesserungen und RexStan-Fixes (v1.3.1)

[skerbis]

Moin
Yves hier ein paar kleine Verbesserungen, hatte gerade Zeit, also dachte ich mir ..

Ich habe ein paar Stabilitäts- und Qualitätsfixes für BlockPeek umgesetzt und direkt als Patch-Release vorbereitet.

Enthalten:

• RexStan-Fixes (null-safety, Typisierung, generische Extension-Point-Annotationen)
• robusteres Preview-Rendering inkl. sauberer Context-Rücksetzung bei force_fe
• Settings-Härtung (Admin-null-check + Template-Validierung auf BLOCK_PEEK_CONTENT)
• Asset-Loading auf content/edit begrenzt
• Version auf 1.3.1 erhöht und Changelog ergänzt

RexStan läuft für das Addon ohne Fehler durch.

[Copilot]

Pull request overview

This PR prepares a 1.3.1 patch release for the BlockPeek REDAXO addon, focusing on RexStan-driven hardening and more robust backend preview rendering/configuration behavior.

Changes:

• Hardened settings access and template saving by adding admin null-safety and validating the required BLOCK_PEEK_CONTENT placeholder.
• Improved preview rendering stability by safely flipping/restoring REDAXO context for force_fe and tightening parameter handling/types for extension points.
• Limited backend asset loading to content/edit and bumped versions/changelog for the 1.3.1 release.

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
pages/settings.php	Adds user null-check and validates template placeholder before persisting changes.
boot.php	Loads BlockPeek assets only on content/edit and uses addon instance for asset URLs.
lib/Generator.php	Tightens constructor typing and ensures force_fe context is restored via try/finally.
lib/Extension.php	Adds generic EP annotation, defensive param parsing, safer updatedate casting, and safer srcdoc escaping.
lib/TemplateInstaller.php	Uses rex_file::get() for default template content loading with fallback.
lib/TemplateListHider.php	Adds generic EP annotation and removes now-redundant subject type guard.
lang/en_gb.lang	Adds i18n string for missing placeholder validation error.
lang/de_de.lang	Adds i18n string for missing placeholder validation error.
package.yml	Bumps addon version to 1.3.1.
package.json	Syncs asset build package version to 1.3.1.
package-lock.json	Syncs lockfile package version to 1.3.1.
CHANGELOG.md	Adds 1.3.1 changelog entry describing fixes and adjustments.

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