{# src/fledermap/web/templates/_favicon.html -- shared browser-tab icon, included in every
page's (same convention as `_theme_init.html`). `favicon.png` is a bat-in-a-map-pin
mark (bat = subject, pin = map -- the app's own name) cropped tight from a 2026-09-05
AI-generated design: background keyed out to transparent by saturation (the original's
near-gray background and rounded-square border both fall below the threshold; the glyph's
saturated green/cyan don't), then the glyph itself cropped to its own bounding box and
centered on a square canvas so it fills top-to-bottom -- no baked-in background square, so
it reads against the browser's own tab-bar colour, light or dark, rather than fighting it.
The bat's original cyan was recoloured to a dark navy -- cyan-on-green measured a WCAG
contrast ratio of ~1.26:1 (near-identical lightness despite the different hue, so the two
shapes blurred together, worst at small sizes), navy-on-green measures ~10.7:1. Ships as a
real static asset (not a data URI) since it's a raster image, not a glyph reference. #}