Capturing the same source under an existing name used to be refused as a
conflict. A hidden .cbd-save.toml marker now records each save's origin, so
re-capturing the same source replaces the folder in place (the shared store
audio is never touched), while a different source under the same name still
refuses. Updates the crabidy-store D5 design note and quality gate.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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