feat: add FIRMS thermal, space weather, radiation, and internet outage layers

Add 4 new intelligence layers for v0.5:
- NASA FIRMS VIIRS thermal anomaly tiles (frontend-only WMTS)
- NOAA Space Weather Kp index badge in bottom bar
- Safecast radiation monitoring with clustered markers
- IODA internet outage alerts at country centroids

All use free keyless APIs. All layers default to off.

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

Former-commit-id: 7cb926e227

frontend/src/app/page.tsx

@@ -146,6 +146,9 @@ export default function Dashboard() {
     gibs_imagery: false,
     highres_satellite: false,
     kiwisdr: false,
+    firms: false,
+    radiation: false,
+    internet_outages: false,
   });
 
   // NASA GIBS satellite imagery state
@@ -511,6 +514,21 @@ export default function Dashboard() {
                 <div className="text-[8px] text-[var(--text-muted)] font-mono tracking-[0.2em]">STYLE</div>
                 <div className="text-[11px] text-cyan-400 font-mono font-bold">{activeStyle}</div>
               </div>
+
+              {/* Divider */}
+              <div className="w-px h-8 bg-[var(--border-primary)]" />
+
+              {/* Space Weather */}
+              <div className="flex flex-col items-center" title={`Kp Index: ${data?.space_weather?.kp_index ?? 'N/A'}`}>
+                <div className="text-[8px] text-[var(--text-muted)] font-mono tracking-[0.2em]">SOLAR</div>
+                <div className={`text-[11px] font-mono font-bold ${
+                  (data?.space_weather?.kp_index ?? 0) >= 5 ? 'text-red-400' :
+                  (data?.space_weather?.kp_index ?? 0) >= 4 ? 'text-yellow-400' :
+                  'text-green-400'
+                }`}>
+                  {data?.space_weather?.kp_text || 'N/A'}
+                </div>
+              </div>
             </div>
           </motion.div>
         </>