evo2 dashboard mockup: per-feature WebLogo PNGs via logomaker

Each of the 11 labeled features now ships with a PWM-driven sequence
logo rendered into public/logos/feature_{id}.png by logomaker. Central
signatures are spec'd per label (Kozak ATG, TATA, polyA, CpG, Shine-
Dalgarno, bacterial -10/-35, splice donor/acceptor, stop TAA/TAG);
flanks are uniform 0-bit so the logos read as clean motif summaries
rather than noisy speckle. Unlabeled features get no logo — their
cards skip the section entirely.

make_mockup_features.py grows _build_pwm() and _render_logo(); the
metadata/atlas parquets carry a logo_path column; App.jsx detects it
optionally and excludes it from category detection; FeatureCard's
expanded view and FeatureDetailPage display the logo above the top-
activating-sequences list.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: polinabinder1