## Summary
- Raise the monthly integration-action quota for paying users: free plan
keeps **3** actions, pro plan gets **9** (resolved via
`User::hasProPlan()`, so self-hosted instances with subscriptions
disabled get the full quota).
- Votes are no longer toggles. Each vote spends one action and pushes
the request up the board, so a user can back the same integration
multiple times. The `(integration_request_id, user_id)` unique index is
dropped (with a standalone FK index added first, since MySQL relied on
the unique one).
- Let users undo a vote, **but only one cast in the current month**. The
refund maps back to the current quota and previous months' tallies stay
locked. The board exposes `can_unvote` and shows a `ChevronDown` control
next to the upvote button, backed by a new `DELETE
/integration-requests/{id}/vote` route.
## Tests
- Feature tests for the free (3) and pro (9) quotas, repeated voting up
to the limit, undoing a current-month vote (and recovering the action),
and the previous-month vote being non-removable.
- Updated the board fixture and added the `Remove one vote` Spanish
translation.
0ea54fa0d7