refactor(settings): simplify PHP templates with data-driven rendering and cleaner control flow

[joshtrichards]

• Resolves: #

Summary

This PR refactors multiple Settings templates to improve readability and maintainability while preserving behavior.

What changed

• Simplified inline conditionals and nested template logic.
• Extracted repeated markup/logic into local variables and structured arrays.
• Replaced repetitive hardcoded blocks with loop-based rendering where appropriate.
• Standardized template formatting (clearer control flow, spacing, and tag style).
• Kept escaping/output behavior intact

Notes

• No intended functional changes.
• DOM IDs/classes and conditional visibility behavior were preserved.

TODO

• ...

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

AI (if applicable)

• The content of this PR was partly or fully generated using AI