Make the canonical v0 todo flow use one TodoRow partial shape for initial list rendering and generated keyed append/replace/remove helpers. Teach hemx-build to treat collection hosts with keyed h-for children as keyed targets, so beginner templates can keep the DRY outer slot + child partial composition.
req: canonical_authoring/002
req: canonical_authoring/003
req: examples/004
req: list/001
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