`[2026-07-07]` **Brand mark + favicon → the aurora squirrel (`v0.20.3`), replacing the `ᛯ` rune.** Operator supplied `/home/lkraven/rata.png` (chibi cyan-green aurora squirrel + acorn). Removed the black background via ImageMagick corner flood-fill (`-fuzz 20% -floodfill` from all 4 corners — keeps the squirrel's interior black linework/eyes (not edge-connected) + the glow, drops only the connected background), downscaled 1024→80px + quantized-64-colors (~12KB base64), inlined as ONE `SQUIRREL` data-URI const in the JS wiring the favicon `<link id="favicon">` href + both `.brand-mark` imgs (rail brand-row + setup-card h1). `.brand-glyph` (font-rune) CSS replaced by `.brand-mark` (img, drop-shadow glow + breathe). Playwright-verified (both marks + favicon decode, naturalWidth>0; no brand-glyph left). Source PNG stays at `/home/lkraven/rata.png` (not committed — data-URI is self-contained + reproducible via the documented floodfill). Patch bump.