Two issues spotted on a histogram event PDF:
1. Footer scale ("Time — /div Amplitude Geo: X in/s/div Mic: Y
psi(L)/div") was overlapping horizontally with the x-axis tick
labels (0, 20, 40, 60...). Both rendered on the same Y row.
Fix: bumped gridspec bottom margin from 0.06 → 0.12, moved the
footer text from y=0.045 → y=0.030 (below the tick labels), moved
the page-bottom Created/Event line from y=0.015 → y=0.005.
Trigger legend on waveforms moved 0.030 → 0.018. Everything
stacks cleanly now without collision.
2. PDF was showing the raw codec output (~150+ bars per histogram)
instead of BW's per-interval aggregation. Why: the aggregation
I'd added to /db/events/{id}/waveform.json wasn't replicated in
the PDF gather path. Now: gather_report_data does the same
max-per-group aggregation when bw_report.histogram.n_intervals is
populated, AND derives per-interval HH:MM:SS labels from the
start time + interval_size_s. Result: histogram PDFs now match
BW's display (one bar per BW interval, x-axis labeled with actual
times) — same fix as the modal chart, applied to the PDF.
For events ingested BEFORE the parser extension (no histogram block
in their sidecar), aggregation is a no-op — they still render with
per-block bars + interval-index x-axis (but the overlap fix applies
to them too). Re-forwarding repopulates the histogram block.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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