feat: expand intelligence dashboard with 7 new feeds, tabbed UI, map, and charts

Backend: wire stablecoin_status, etf_flows, acled_events, ucdp_events,
displacement, risk_scores, and signal_convergence into the SSE overview
endpoint (23 total feeds, up from 16).

Frontend: complete rewrite with 7-tab navigation (Overview, Markets,
Security, Conflict & Humanitarian, Natural & Climate, Geospatial Map,
Trend Charts), Leaflet dark-tile map with toggleable layers, Chart.js
rolling time-series, feed health counter, and DOMPurify sanitization.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/world_intel_mcp/dashboard/app.py

@@ -31,6 +31,8 @@ from world_intel_mcp.sources import (
     displacement,
     aviation,
     climate,
+    conflict,
+    intelligence,
 )
 
 logger = logging.getLogger(__name__)
@@ -78,6 +80,13 @@ async def _fetch_overview() -> dict:
         "airport_delays": aviation.fetch_airport_delays(fetcher),
         "climate_anomalies": climate.fetch_climate_anomalies(fetcher),
         "energy_prices": economic.fetch_energy_prices(fetcher),
+        "stablecoin_status": markets.fetch_stablecoin_status(fetcher),
+        "etf_flows": markets.fetch_etf_flows(fetcher),
+        "acled_events": conflict.fetch_acled_events(fetcher),
+        "ucdp_events": conflict.fetch_ucdp_events(fetcher),
+        "displacement": displacement.fetch_displacement_summary(fetcher),
+        "risk_scores": intelligence.fetch_risk_scores(fetcher),
+        "signal_convergence": intelligence.fetch_signal_convergence(fetcher),
     }
 
     gathered = await asyncio.gather(