Interactive permit heat map with live data verification

- Leaflet.js map with dark tiles showing real Chicago building permits
- Dots sized and colored by project cost ($1B+ red, $100M+ orange, $10M+ blue)
- Hover any dot for project details — address, cost, description, date
- LIVE indicator with green pulse dot
- Timestamp showing when data was fetched
- "Verify source" link goes directly to Chicago Open Data portal
- "Refresh" button re-fetches from the API on click
- Expanded to 50 permits for denser map coverage
- Legend showing dot size scale

No one can say "you just typed those numbers in" when they can
click a dot on the map, see 10000 W OHARE ST, and verify it
themselves on data.cityofchicago.org.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mcp-server/index.ts

@@ -1042,7 +1042,7 @@ tr:hover{background:#111827}
             const permitUrl = "https://data.cityofchicago.org/resource/ydr8-5enu.json";
             const [bigR, byTypeR, recentR, benchR] = await Promise.all([
               // Top 8 largest permits by cost
-              fetch(`${permitUrl}?$select=permit_type,work_type,work_description,reported_cost,street_number,street_direction,street_name,community_area,issue_date,latitude,longitude&$where=reported_cost>1000000 AND issue_date>'2025-06-01'&$order=reported_cost DESC&$limit=8`).then(r => r.json()),
+              fetch(`${permitUrl}?$select=permit_type,work_type,work_description,reported_cost,street_number,street_direction,street_name,community_area,issue_date,latitude,longitude&$where=reported_cost>1000000 AND issue_date>'2025-06-01'&$order=reported_cost DESC&$limit=50`).then(r => r.json()),
               // Permits grouped by work type
               fetch(`${permitUrl}?$select=work_type,count(*) as cnt,sum(reported_cost) as total_cost&$where=reported_cost>10000 AND issue_date>'2025-06-01'&$group=work_type&$order=total_cost DESC&$limit=10`).then(r => r.json()),
               // Most recent permits