Fix: Ortsnamen-Layer, InfoBox bei Klick, globale Flugabdeckung

Ortsnamen: Esri World Boundaries als zuschaltbarer Imagery-Layer.
InfoBox: CSS-Ausblendung entfernt, Dark-Theme Styling.
Flugverkehr: Batch-Groesse 3, Pause 3s, zufaellige Reihenfolge —
alle Regionen bekommen Daten statt nur Europa.

src/data_flights.py

@@ -27,10 +27,12 @@ _lock = asyncio.Lock()
 _task = None
 
 
+import random
+
 async def _fetch_all():
     """Holt Flugdaten fuer alle Stuetzpunkte."""
     now = time.time()
-    if _cache["data"] and now - _cache["ts"] < 25:
+    if _cache["data"] and now - _cache["ts"] < 45:
         return _cache["data"]
 
     async with _lock:
@@ -39,9 +41,11 @@ async def _fetch_all():
 
         seen = {}
         errors = 0
+        grid = list(_GRID)
+        random.shuffle(grid)
         async with httpx.AsyncClient(timeout=10) as client:
-            for i in range(0, len(_GRID), 10):
-                batch = _GRID[i:i+10]
+            for i in range(0, len(grid), 3):
+                batch = grid[i:i+3]
                 tasks = [client.get(f"https://api.airplanes.live/v2/point/{lat:.2f}/{lon:.2f}/250")
                          for lat, lon in batch]
                 results = await asyncio.gather(*tasks, return_exceptions=True)
@@ -56,8 +60,8 @@ async def _fetch_all():
                                 seen[h] = ac
                     except Exception:
                         errors += 1
-                if i + 10 < len(_GRID):
-                    await asyncio.sleep(0.2)
+                if i + 3 < len(grid):
+                    await asyncio.sleep(3.0)
 
         _cache["data"] = {"ac": list(seen.values()), "total": len(seen), "errors": errors}
         _cache["ts"] = time.time()
@@ -73,7 +77,7 @@ async def _collector_loop():
             await _fetch_all()
         except Exception as e:
             logger.warning(f"Flight collector error: {e}")
-        await asyncio.sleep(30)
+        await asyncio.sleep(60)
 
 
 def start_flight_collector():