feat: refine earth hud panel behaviors and news board

backend/app/api/main.py

@@ -13,6 +13,7 @@ from app.api.v1 import (
     collected_data,
     visualization,
     bgp,
+    news,
     system_control,
     tv,
 )
@@ -35,3 +36,4 @@ api_router.include_router(system_control.router, prefix="/system", tags=["system
 api_router.include_router(visualization.router, prefix="/visualization", tags=["visualization"])
 api_router.include_router(bgp.router, prefix="/bgp", tags=["bgp"])
 api_router.include_router(tv.router, prefix="/tv", tags=["tv"])
+api_router.include_router(news.router, prefix="/news", tags=["news"])

backend/app/api/v1/news.py

@@ -0,0 +1,13 @@
+from fastapi import APIRouter, Query
+
+from app.services.earth_news import get_earth_news_payload
+
+router = APIRouter()
+
+
+@router.get("/earth-feed")
+async def get_earth_feed(
+    lat: float | None = Query(None, description="Current Earth view center latitude"),
+    lon: float | None = Query(None, description="Current Earth view center longitude"),
+):
+    return await get_earth_news_payload(lat=lat, lon=lon)