Bumps font sizes across the in-app React Flow diagram and the README's
SVG so block titles, stage names, body copy, and chip labels are easier
to read. Widens stage cards and updates the SVG layout so every stage
body wraps to two lines, and resizes every badge rect to fit its text
with even 12px padding on both sides (notably the PostgreSQL chip).
Also includes a pre-existing README addition noting that KTX runs with
the user's own LLM keys or a Claude Pro/Max subscription.
Replace the PNG mascot with the refined "C" SVG (light + dark variants)
and enlarge the nav logo from 32px to 56px so it reads at a glance.
Also drop the same SVG pair into assets/ for repo-wide reuse.