TICKET A: BUG — regression: chart bars were rainbow-colored, now monochrome since yesterday.
TICKET B: QUESTION — asks if PDF export exists or is planned; not requesting new capability.
TICKET C: SPAM — external unverified domain, vague pretext, 48-hour pressure tactic.
TICKET D: BUG — reproducible defect (filter order causes date reset); reproducibility makes it a bug.