Two one-shot bootstraps left a per-user flag in localStorage so they
wouldn't run twice — and after F7 deleted the helpers themselves
(2a8e8ff98), the flags pointed at code that no longer existed:
mana.profile.silentTwinRepair.<userId>
mana.profile.avatarMigration.<userId>
New \`cleanupOrphanMigrationFlags()\` runs once per page load from the
(app) layout's onMount, right after \`restoreClientIdFromDexie()\`.
Cheap (single localStorage scan), idempotent (no-op once swept),
silent on private-mode / quota errors. The known-orphan prefix list
lives in the helper file with deletion-commit refs so it's clear
when each entry can be retired.
Future migration deletions: append the prefix to ORPHAN_KEY_PREFIXES
in the same commit that drops the helper, and the next page load
on every device cleans up.
Closes Punkt 8 of the F1-F7 follow-up audit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
119cd2cf83