Close the fallible handler and example coherence slice: v0 uses typed todo newtypes, Result handler failure mapping, generated form/partial helpers, and page composition; kanban is explicitly marked as an advanced north-star milestone; raw render is isolated behind hemx::advanced::render.
req: canonical_authoring/003
req: failure/004
req: public_api/005
req: examples/004
Keep example READMEs aligned with the generated-resource, tuple-composed IntoEffect authoring path instead of lower-level handle/EffectBatch wording.
req: dx/006
req: examples/003