@mytec: iter3.4.0 ready for testing

backend/app/api/websocket.py

@@ -62,6 +62,23 @@ class ConnectionManager:
         except Exception as e:
             logger.warning(f"[WS] send_error failed: {e}")
 
+    async def send_partial_results(
+        self, ws: WebSocket, calc_id: str,
+        points: list, tile_idx: int, total_tiles: int,
+    ):
+        """Send per-tile partial results for progressive rendering."""
+        try:
+            await ws.send_json({
+                "type": "partial_results",
+                "calculation_id": calc_id,
+                "points": [p.model_dump() for p in points],
+                "tile": tile_idx,
+                "total_tiles": total_tiles,
+                "progress": (tile_idx + 1) / total_tiles,
+            })
+        except Exception as e:
+            logger.debug(f"[WS] send_partial_results failed: {e}")
+
 
 ws_manager = ConnectionManager()
 
@@ -135,6 +152,12 @@ async def _run_calculation(ws: WebSocket, calc_id: str, data: dict):
 
         await ws_manager.send_progress(ws, calc_id, "Initializing", 0.02)
 
+        # ── Tile callback for progressive results (large radius) ──
+        async def _tile_callback(tile_points, tile_idx, total_tiles):
+            await ws_manager.send_partial_results(
+                ws, calc_id, tile_points, tile_idx, total_tiles,
+            )
+
         # ── Backup progress poller: catches anything call_soon_threadsafe missed ──
         async def progress_poller():
             last_sent_seq = 0
@@ -165,6 +188,7 @@ async def _run_calculation(ws: WebSocket, calc_id: str, data: dict):
                     coverage_service.calculate_coverage(
                         sites[0], settings, cancel_token,
                         progress_fn=sync_progress_fn,
+                        tile_callback=_tile_callback,
                     ),
                     timeout=300.0,
                 )
@@ -173,6 +197,7 @@ async def _run_calculation(ws: WebSocket, calc_id: str, data: dict):
                     coverage_service.calculate_multi_site_coverage(
                         sites, settings, cancel_token,
                         progress_fn=sync_progress_fn,
+                        tile_callback=_tile_callback,
                     ),
                     timeout=300.0,
                 )