Replace L.circleMarker with L.divIcon + .pn-marker CSS class (white
border, box-shadow, hover scale) matching the beanflows growing
conditions map pattern. Dark .map-tooltip CSS override (no arrow,
dark navy background). Small venue dots use .pn-venue class.
Add _require_maps_flag() to all 4 API endpoints (default=True so
dev works without seeding the flag row). Gate /opportunity-map route
the same way.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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