Replace fixed /hemx.js wording with helper-provided runtime asset language so docs match hemx-axum runtime_js_path deployment boundaries.
req: axum_integration/005
req: examples/001
Document optional PWA/offline support as an adapter boundary: cached shell, domain-command queues, server-canonical replay, conflict/fingerprint behavior, and sync-crate shape without adding a client state graph or service worker to core.
req: canonical_authoring/008
req: runtime/003
req: runtime/004
req: auth/002
req: auth/004
req: failure/004
req: failure/005
req: sync/001
req: sync/007