3e5ced1655
The flat write_date-sorted list was hard to scan with 50+ tickets — solved ones were intermixed with active ones, and there was no signal for priority. Bucket each ticket server-side into 'critical' (open + priority High/Urgent), 'solved' (stage marked fold=True on central) or 'open' (everything else), and render three labelled sections in the dialog with sticky headers, count badges, and per-group accent colours. Backend keeps its write_date desc order so latest is always at top within each bucket. Bucketing uses helpdesk.stage.fold (not the stage name) so renaming "Solved" to "Done" on the central won't quietly mis-categorise rows. Adds bucket_ticket() in utils.py with unit tests covering the folded-wins-over-priority precedence and the missing-priority fallback. Also surfaces a small Urgent (triangle) / High (arrow) icon on each row so a critical ticket reads at a glance even after a user scrolls past the section header. Bumps fusion_helpdesk to 19.0.1.6.0.