Fix home page JSON-LD crashing structured-data readers

[posthog]

Summary

The home page injected its schema.org JSON-LD as a bare top-level array (JSON.stringify([organizationJsonLd, productJsonLd, faqJsonLd])). Each object carried its own @context, but the array itself had none, so any consumer that treats the parsed JSON-LD as a single object reads r["@context"] → undefined and crashes calling .toLowerCase() on it.

This wraps the three entities in a single @graph with one top-level @context, and drops the now-redundant per-object @context in seo.ts. This both removes the crash trigger and produces a more standard structured-data shape (a small SEO correctness gain).

Why

Error tracking captured an unhandled TypeError: undefined is not an object (evaluating 'r["@context"].toLowerCase') on https://amend.sh/ (Safari 26.3, 2026-06-06). The crashing code is an injected third-party JSON-LD reader (browser extension / structured-data reader), but the bare-array shape is what triggers it.

---

Created with PostHog Code from an inbox report.

[greptile-apps]

Greptile Summary

This PR changes the home page structured data shape.

• Wraps the JSON-LD entities in a top-level schema.org object.
• Emits the organization, product, and FAQ data through @graph.
• Removes repeated @context fields from the graph nodes.

Confidence Score: 5/5

Safe to merge.

The change is narrowly scoped to structured-data serialization on the home page and no code issues were identified.

T-Rex Logs

What T-Rex did

• Observed the initial run where the base emitted a bare array, with IS_ARRAY true, TOP_CONTEXT undefined, CONTEXT_TOLOWERCASE_ERROR TypeError, no top-level graph, and array entity types Organization, SoftwareApplication, FAQPage.
• Observed the subsequent run where the head emitted an object, with IS_ARRAY false, TOP_CONTEXT https://schema.org, CONTEXT_TOLOWERCASE https://schema.org, GRAPH_LENGTH 3, graph types Organization, SoftwareApplication, FAQPage, and GRAPH_ENTITY_CONTEXTS absent.

_{Ran code and verified through T-Rex}

_{Reviews (1): Last reviewed commit: "Wrap home page JSON-LD in @graph with a ..." | Re-trigger Greptile}