feat: add strategic synthesis to dashboard map + drawer

- Strategic Posture section (top of drawer): composite score, 9 domain
  grid with color-coded scores, top 5 threats
- Fleet Report section: readiness score/level, waterway status table,
  aircraft count, active surges
- Population Exposure map layer: circle markers sized by population,
  colored by threat type (red=conflict, orange=quake, yellow=fire)
- Population Exposure drawer section: total exposed, by event type,
  city table with distance
- HUD pills: Posture score + Exposed population
- Layer toggle for Pop Exposure (purple, default on)
- Backend: exposure API now includes lat/lon for map rendering

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

src/world_intel_mcp/dashboard/app.py

@@ -43,6 +43,9 @@ from world_intel_mcp.sources import (
     service_status,
 )
 from world_intel_mcp.analysis.alerts import fetch_alert_digest, fetch_weekly_trends
+from world_intel_mcp.analysis.posture import fetch_strategic_posture
+from world_intel_mcp.analysis.exposure import fetch_population_exposure
+from world_intel_mcp.sources.fleet import fetch_fleet_report
 from world_intel_mcp.config.countries import INTEL_HOTSPOTS
 from world_intel_mcp.config.geospatial import MILITARY_BASES, STRATEGIC_PORTS, PIPELINES, NUCLEAR_FACILITIES
 
@@ -108,6 +111,9 @@ async def _fetch_overview() -> dict:
         "alert_digest": fetch_alert_digest(fetcher),
         "weekly_trends": fetch_weekly_trends(fetcher),
         "service_status": service_status.fetch_service_status(fetcher),
+        "strategic_posture": fetch_strategic_posture(fetcher),
+        "fleet_report": fetch_fleet_report(fetcher),
+        "population_exposure": fetch_population_exposure(fetcher),
     }
 
     gathered = await asyncio.gather(