Phase 2.2: performance optimizations, debug tools, app close fix

backend/app/services/reflection_service.py

@@ -273,4 +273,37 @@ class ReflectionService:
         return 10 * np.log10(total_power)
 
 
+    def find_reflection_paths_sync(
+        self,
+        tx_lat: float, tx_lon: float, tx_height: float,
+        rx_lat: float, rx_lon: float, rx_height: float,
+        frequency_mhz: float,
+        buildings: List[Building],
+        include_ground: bool = True
+    ) -> List[ReflectionPath]:
+        """Sync version (no I/O in the async original)"""
+        paths = []
+
+        for building in buildings:
+            path = self._find_single_bounce(
+                tx_lat, tx_lon, tx_height,
+                rx_lat, rx_lon, rx_height,
+                frequency_mhz, building
+            )
+            if path:
+                paths.append(path)
+
+        if include_ground:
+            ground_path = self._calculate_ground_reflection(
+                tx_lat, tx_lon, tx_height,
+                rx_lat, rx_lon, rx_height,
+                frequency_mhz
+            )
+            if ground_path:
+                paths.append(ground_path)
+
+        paths.sort(key=lambda p: p.total_loss)
+        return paths[:5]
+
+
 reflection_service = ReflectionService()