Scripts.js maintenance: sanitizeHTML and reduce function complexities

[helms-charity]

The biggest change was that handleSectionMetadata was reduced from a complexity of 41 to under 15 by moving logic into five helpers:

• applySpecialSectionMetadata(metadata, section) – style, backgroundcolor, grid, gap, spacing, containerwidth, height/heightmobile.
• applyDataAttributesFromMetadata(metadata, section) – writes non-special keys to section.dataset and sets section.id when present.
• applySectionBackgroundImages(metadata, section) – section desktop/mobile background images.
• applyDecorationImages(metadata, section) – decoration (doodle) images and reverse flag.
• applyBlockContentMetadata(metadata, section) – block-content background, images, object-fit, object-position.
• addressed CWE-915 / OWASP A01 – Prototype pollution. Replaced the plain object with a Map so block IDs are stored with blockIds.get(name) / blockIds.set(name, value) instead of blockIds[name]. No prototype is involved, so there’s no prototype pollution risk.

Also added the section metadata key lists as Set()s since apparently this has been a thing since ES6.

Fix #675

Test URLs:

• Before: https://main--idfc--aemsites.aem.page/

• After: https://675-scriptsjsmain--idfc--aemsites.aem.page/

• Before: https://main--idfc--aemsites.aem.page/credit-card/metal-credit-card/mayura

• After: https://675-scriptsjsmain--idfc--aemsites.aem.page/credit-card/metal-credit-card/mayura

Testing: There should not be any functional difference.

After: your IDE should not have errors anymore.

[aem-code-sync]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed.
In case there are problems, just click a checkbox below to rerun the respective action.

• Re-run PSI checks
• Re-sync branch

Commits

• 29967cb ✅ (latest)
• 226acd5 ✅
• 4b6b076 ✅
• 6267479 ✅

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/
🖥️	/
📱	/credit-card/metal-credit-card/mayura
🖥️	/credit-card/metal-credit-card/mayura

[amarghioali]

LGTM