[audit/nice-to-have] Accessibility & formatting fixes (Unicode title, header GIF)

[Displacedtex]

Priority: Nice-to-have

Problem

• README line 1 uses Unicode mathematical bold characters (𝗔𝗿𝘁𝗶𝗳𝗶𝗰𝗶𝗮𝗹 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝗰𝗲) — renders inconsistently across devices, and screen readers pronounce them as strings of individual math symbols.
• Header asset is a large GIF served via raw GitHub — slow on mobile, no alt text.

Recommendation

• Replace Unicode-bold title with a plain Markdown # heading.
• Replace the GIF with a static SVG/PNG (or keep the GIF but add meaningful alt= text).
• Audit README for other emoji-only links — same as [audit/high] Standardize link format (replace [👆] anchors) #7 but broader pass.

Acceptance criteria

• Title renders identically across GitHub web, mobile app, and screen readers.
• Header image has alt text.

Part of the repo audit backlog.