Refine card crops and table contrast

[8tp]

Summary

• replace the Ambassador and Contessa compact-card portraits with more consistent, face-forward v4 crops
• darken and simplify the desktop/mobile table overlays so controls and copy stay readable
• lift the main-menu wordmark with a restrained brightness/contrast/shadow treatment
• cache-bust the service worker and document the updated crop pipeline

Why

The prior Ambassador and Contessa focus crops did not match the framing of the other influence cards in the actual compact card UI. The generated table art also competed with the menu wordmark and interface text, especially on mobile.

Impact

• character artwork itself is unchanged; only the two compact-card crops are replaced
• versioned v4 paths and a v4 service-worker cache prevent installed clients from retaining stale crops
• the table backgrounds remain visible but sit behind a stronger responsive fade
• no gameplay, protocol, or server behavior changes

Validation

• npm run typecheck
• npm test — 599 tests passed
• npm run build
• git diff --check
• verified both v4 WebP assets are 512×768, opaque sRGB
• verified every service-worker precache path exists
• reviewed deterministic 5:7 card composites and desktop/mobile background composites