fix: guard dynamic import transient errors

[maxakuru]

Problem

Several lazy features are pulled in with a dynamic import(...).then(...) that has no rejection handler. A dynamic import can reject at the network level with:

TypeError: Failed to fetch dynamically imported module: https://www.vitamix.com/blocks/fragment/fragment.js

on a transient failure (offline, connection reset, or a request blocked by an extension). With no handler, that rejection becomes an unhandled promise rejection and surfaces in monitoring. Note that a surrounding synchronous try/catch does not catch it, since the failure is async.

Fix

Guard the three unhandled dynamic imports in scripts.js so a failed module fetch degrades gracefully instead of throwing an unhandled rejection:

• fragment auto-block — fragment links are left in place; the failure is logged to the console (matching the existing per-fragment error handling right beside it).
• image color extraction — the image keeps its default color treatment.
• gift-with-purchase — stays uninitialized for this page load and resumes on the next navigation.

Each uses the two-argument .then(onFulfilled, onRejected) form, so only the import rejection is handled — a genuine error thrown inside the fulfilled callback still propagates and stays visible.

Test URLs

• Before: https://main--vitamix--aemsites.aem.network/
• After: https://fix-fragment-import-guard--vitamix--aemsites.aem.network/

To reproduce: load a page that uses one of these features (e.g. a page with a fragment reference) and cause the module request to fail at the network level (offline, or blocked by an extension). Before the fix this throws an unhandled rejection; after the fix the feature degrades quietly and the page stays healthy.

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Commits

• f12c4a1 ✅ (latest)