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tanabata/frontend/src/lib/stores
H1K0 a371045b41
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fix(frontend): keep auth tokens in sync across browser tabs
Refresh tokens rotate on every use and each refresh deletes the old
session server-side, so when one tab refreshed, other open tabs were
left holding a dead access token and a rotated-away refresh token —
their next request 401'd and bounced them to the login screen.

Sync the auth store across tabs via the storage event (propagating
logins, refreshes, and logouts), and make refresh race-resilient: if a
refresh fails but a newer token has meanwhile synced in from another
tab, adopt it and retry instead of ending a still-valid session.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-12 00:13:13 +03:00
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