Non-article cities were fully gray (#9CA3AF), stripping informational value.
Now all cities show score-based colors (green/amber/red). Non-article cities
are differentiated via lower opacity, dashed border, desaturation, and
default cursor (no click handler). Tooltips show scores for all cities —
article cities get "Click to explore →", non-article cities get "Coming soon".
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>