The 4 bulk-action confirm buttons (close/assign/priority/status) called
their performBulk*() handler directly on click with no in-flight guard.
Double-clicking a confirm button fired two concurrent POST /api/
bulk_operation.php requests for the same ticket IDs, duplicating the
close-reason comment, audit-log entry, and Matrix notification on every
affected ticket.
Each performBulk*() function now takes the clicked button, no-ops if
it's already disabled, disables it before firing the request, and
re-enables it in .finally() regardless of outcome.
Verified by extracting performBulkAssign() from the real source and
driving it with a mock lt.api.post() that never resolves until told to:
a simulated rapid double-click fired exactly one request (the second
call was a no-op while the button was disabled), and a subsequent click
after the request resolved correctly fired a new request.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0117oBw2jN4kALYeS8HPq4zV