✨ feat(disaster): add NASA EONET layer with scorch effects

Add disaster feature slice with NASA EONET v3 proxy (wildfires, storms,
volcanoes, floods, earthquakes). Disasters render as stacked scorch
marks (char + flame + ignition core). Flood zones now use 3-layer ink
bleed (halo + fill + edge). Add Playwright capture scripts for
Chicago, New Orleans, and showcase comparisons.

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

surgeink/api/disasters.py

@@ -0,0 +1,41 @@
+import httpx
+from fastapi import APIRouter, Query
+
+from surgeink.cache.redis_cache import cache_get_json, cache_set_json
+
+router = APIRouter()
+
+EONET_BASE = "https://eonet.gsfc.nasa.gov/api/v3/events/geojson"
+CACHE_TTL = 600  # 10 minutes
+
+
+@router.get("/disasters")
+async def get_disasters(
+    categories: str = Query(
+        "wildfires,severeStorms,volcanoes,floods,earthquakes",
+        description="Comma-separated EONET category IDs",
+    ),
+    limit: int = Query(200, ge=1, le=1000),
+    days: int = Query(30, ge=1, le=365),
+    status: str = Query("open", description="open or closed"),
+):
+    cache_key = f"disasters:{categories}:{limit}:{days}:{status}"
+    cached = await cache_get_json(cache_key)
+    if cached is not None:
+        return cached
+
+    params = {
+        "status": status,
+        "limit": limit,
+        "days": days,
+    }
+    if categories:
+        params["category"] = categories
+
+    async with httpx.AsyncClient(timeout=20.0) as client:
+        resp = await client.get(EONET_BASE, params=params)
+        resp.raise_for_status()
+
+    data = resp.json()
+    await cache_set_json(cache_key, data, CACHE_TTL)
+    return data

surgeink/api/router.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter
 
-from surgeink.api import geocode, forecast, layers, risk, tiles, predict, interpret, fema
+from surgeink.api import geocode, forecast, layers, risk, tiles, predict, interpret, fema, disasters
 
 router = APIRouter(prefix="/api/v1")
 
@@ -12,3 +12,4 @@ router.include_router(tiles.router, tags=["tiles"])
 router.include_router(predict.router, tags=["predict"])
 router.include_router(interpret.router, tags=["interpret"])
 router.include_router(fema.router, tags=["fema"])
+router.include_router(disasters.router, tags=["disasters"])