docs(requirements): split offline adapter boundary

Split oversized canonical_authoring/008 into offline opt-in, adapter queue, and no-core-local-runtime requirements.

req: canonical_authoring/008

req: canonical_authoring/018

req: canonical_authoring/019

AGENTS.md

@@ -67,5 +67,5 @@ Keep it stable. Prefer pointers to canonical sources over copied structure, file
 - JS runtime changes must preserve root-scoped lookup, fail-closed request handling, root-scoped error outlets, and tiny pending/failure/trigger-timing conventions without selectors, VDOM, expressions, or per-node listeners. req: runtime/005 req: convention/001 req: convention/003 req: convention/005 req: convention/007
 - Opaque island JavaScript is a leaf adapter for high-frequency local behavior only; it must not introduce a component runtime, client state graph, VDOM, or second UI model. req: canonical_authoring/017
 - Host capability adapters must stay at the `hemx-host` boundary: they may call host APIs and return host events, but they must not mutate DOM or own app/domain state. req: host/002
-- Local/offline app behavior should be commands/events/projections; do not add `hemx-local`, stored DOM patches, or stored `EffectBatch` truth without a proven reusable contract. req: local/001 req: local/002
+- Local/offline app behavior should be commands/events/projections; do not add `hemx-local`, stored DOM patches, stored `EffectBatch` truth, or a core client state graph without a proven reusable contract. req: canonical_authoring/018 req: canonical_authoring/019 req: local/001 req: local/002
 - Axum apps should serve and load the shared runtime through hemx-axum helpers such as `runtime_js_path()` and `runtime_js()`, not hard-coded `/hemx.js` URLs or app-owned cache-busting strings.