Summary

The 2026-09-30 estate page-weight census measured this home document at 338,842 B decoded with the inline <script type="application/json" data-home-vertical-data> blob carrying 141,568 B (41.8%). The blob is a generated home-cluster build artifact, not editorial content.

This PR moves it to a same-origin static asset and keeps the rendered diagram identical:

• index.md 338,842 → 197,334 B; the inline blob is replaced by the empty placeholder shape plus data-home-vertical-src="/assets/js/home-vertical-data.json".
• assets/js/home-vertical-data.json (new, 137,564 B): the blob with every /path Liquid form rendered to the exact URL Jekyll emits (same transform verified 171/171 nodes / 0 mismatches against the live Jekyll output on the ai-doom carrier).
• assets/js/page-enhancements.js: initHomeVerticalView now fetches the asset when the inline node ships empty (fetch with XHR fallback, credentials: same-origin); inline payloads keep the previous synchronous path; fetch failure falls back to today’s empty behavior (tree hidden). Node syntax checked; the refactor shape is proven on the ai-doom carrier (PR #1 on website-20260805_094416-ai-doom-existential) with DOM-stubbed path tests.
• _config.yml: ui_bundle_version bumped for asset cache-busting.

Projected effect (census share method): home document ≈197,274 B decoded (−41.8%). Zero editorial content touched; zero deploy actions in the producing session.

Part of the estate template page-weight trim work item (alpha-production:estate-template-page-weight-trim:v1, #4439 P0 production quality).