fix(web): turning a retention rule on no longer saves 8 days first

Enabling a retention switch published 8 days immediately, so cleanup could
run before the user chose an age. The switch now opens a local draft and
saves only when that age is committed. Leaving or cancelling the draft keeps
the rule off. Turning an enabled rule off still saves immediately.
095182815fmacodev00 committed on 10/20/2026, 7:57:51 AMparentd18352e

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