Add 3 new ticket list filters: Support User (dynamic select), Contact (dynamic
select), and Period (30/90/180/365 days). Extend categories endpoint to also
return support_users and contacts arrays from the same cached ticket data.
Add server-side filtering for all three in the data endpoint.
Resolve support user abbreviation codes to full names in the communication chat
widget. For single-ticket view, infer code-to-name from Support_User_Name when
only one support code appears. For debitor view, build map from already-fetched
entries across tickets with no additional API calls.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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