Let users see and unsubscribe their own push devices

Fixes duplicate/triple OS notifications on machines where more than
one browser (e.g. both Chrome and Edge on Windows) independently got
notification permission for the site — each held its own valid
subscription, so every event pushed to both.

Adds a userAgent column (captured client-side at subscribe time,
display-only) and a Settings > Account section listing a user's own
subscribed browsers with a friendly label plus an unsubscribe button,
backed by new GET/DELETE /api/push/subscriptions endpoints scoped to
the caller's own rows.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Gh2UXUQUVBWroWEnn1FLFG
This commit is contained in:
ogrechkoandClaude Sonnet 5 committed 2026-09-07 06:49:34 +00:00
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commit f5e49b5c53
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