@mytec: iter2.4 ready for testing

backend/app/api/routes/coverage.py

@@ -12,6 +12,7 @@ from app.services.coverage_service import (
     apply_preset,
     PRESETS,
 )
+from app.services.parallel_coverage_service import CancellationToken
 
 router = APIRouter()
 
@@ -59,6 +60,7 @@ async def calculate_coverage(request: CoverageRequest) -> CoverageResponse:
 
     # Time the calculation
     start_time = time.time()
+    cancel_token = CancellationToken()
 
     try:
         # Calculate with 5-minute timeout
@@ -66,7 +68,8 @@ async def calculate_coverage(request: CoverageRequest) -> CoverageResponse:
             points = await asyncio.wait_for(
                 coverage_service.calculate_coverage(
                     request.sites[0],
-                    request.settings
+                    request.settings,
+                    cancel_token,
                 ),
                 timeout=300.0
             )
@@ -74,12 +77,17 @@ async def calculate_coverage(request: CoverageRequest) -> CoverageResponse:
             points = await asyncio.wait_for(
                 coverage_service.calculate_multi_site_coverage(
                     request.sites,
-                    request.settings
+                    request.settings,
+                    cancel_token,
                 ),
                 timeout=300.0
             )
     except asyncio.TimeoutError:
+        cancel_token.cancel()
         raise HTTPException(408, "Calculation timeout (5 min) — try smaller radius or lower resolution")
+    except asyncio.CancelledError:
+        cancel_token.cancel()
+        raise HTTPException(499, "Client disconnected")
 
     computation_time = time.time() - start_time