Closes the two remaining gaps after the seeding-cleanup landed:
- `data/space-stamping.test.ts` exercises the smart-hook contract
end-to-end against fake-indexeddb. Four scenarios: active Brand
Space → row carries Brand UUID; no active Space → personal sentinel;
explicit spaceId on the record is preserved verbatim; flipping the
active Space between writes flips the stamp. The Brand-Space case
is the regression guard for the original bug (writes silently
routing to Personal after `reconcileSentinels`).
- `apps/mana/CLAUDE.md` gets a Per-Space Seeds section so the next
module dev who needs to pre-populate something on Space activation
finds the `registerSpaceSeed` pattern + `data/seeds/index.ts` barrel
+ the deterministic-id discipline without grepping the codebase.
Reference impl link points at workbench-home.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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