[t0mdavid-m]

Before: the MS2 spectrum of a peptide-spectrum match, the measured spectrum mirrored against the AlphaPeptDeep prediction, could only be saved as a PNG through the plot's camera button. A PNG can't be edited or scaled for a figure.

After: the plot's toolbar has a "Download as SVG" button. It saves a standalone, editable vector file, named after the match, e.g. VVDVLDSIK_2+_scan52580.svg, with both spectra, the ion labels and the axes. It appears on every page that shows a PSM spectrum.

How: OpenMS-Insight's MirrorPlot gained the button and an svg_filename option in Insight #29. show_spectrum passes svg_name(peptide, charge, scan). Modifications in the name become hyphens, e.g. PEPM-Oxidation-TIDEK_3+_scan7, and characters a file system might reject are dropped. Insight #29 is on Insight main but not yet on PyPI, so requirements.txt installs the same development build of Insight main as #81. The two pins are identical, so the PRs merge cleanly in either order. Before an app release, the pin should go back to the next PyPI version.

When AlphaPeptDeep is not installed, the page shows the plain annotated spectrum (Insight LinePlot). That plot has no SVG button yet; that would be a separate Insight change.

Checked:

• New tests/test_spectrum_svg_name.py, 3 tests: a plain peptide, modification brackets and parentheses, and unsafe characters.
• Full suite with the development build installed: 607 passed.
• py_compile passes on the content pages, and pylint errors-only is clean on the changed files.
• In the app with AlphaPeptDeep, the "Peptide-spectrum matches" page shows the button. Clicking it saved VVDVLDSIK_2+_scan52580.svg, which opens as the full mirrored spectrum shown below.

The button	The downloaded SVG

Video (mp4): https://raw.githubusercontent.com/OpenMS/quantms-web/claude/media-spectrum-svg/spectrum-svg.mp4 · The SVG itself: https://raw.githubusercontent.com/OpenMS/quantms-web/claude/media-spectrum-svg/VVDVLDSIK_2plus_scan52580.svg

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