Merge origin/main into german/navara

Brings in 190 commits from main. Integration on the engine contract:

- News and Shipwrecks draw, pick and keep their selection through the
  contract and shared map markers, so they follow engine switches.
- Aircraft tracking uses main's segmented trails with contract frame
  numbers.
- Decoded weather tiles move into the Cesium adapter and are injected
  through the renderer registry; Navara hides those sources on globe
  surfaces (docs/KNOWN-ISSUES.md).
- Street-vehicle GPU depth occlusion stays Cesium-only; Navara keeps
  the geometric visibility checks (docs/KNOWN-ISSUES.md).
- Transit includes the heading-neutral atlas icons.

package.json

@@ -145,6 +145,9 @@
     "./server/providers/regional": {
       "node": "./server/providers/regional.js"
     },
+    "./server/providers/news": {
+      "node": "./server/providers/news.js"
+    },
     "./server/providers/openai": {
       "node": "./server/providers/openai.js"
     },
@@ -268,6 +271,7 @@
     "./layers/gnss/source": "./src/layers/gnss/source.js",
     "./layers/ghostmaps/source": "./src/layers/ghostMaps/source.js",
     "./layers/drone-airspace/source": "./src/layers/droneAirspace/source.js",
+    "./layers/news/source": "./src/layers/news/source.js",
     "./layers/firms/source": "./src/layers/firms/source.js",
     "./layers/installations/source": "./src/layers/installations/source.js",
     "./layers/launches/source": "./src/layers/launches/source.js",