feat: UDP data forwarding to multiple downstream devices

- DataForwarder class in listener: sends raw packets to all enabled targets
- REST API: GET/PUT /api/forward for managing targets
- Settings page: add/remove/edit forward targets with host/port/name/enabled
- Status endpoint includes forward_active count
- Config persisted in data/config.json via forward_targets array

server/api.py

@@ -31,6 +31,7 @@ async def get_status():
         "packet_count": telemetry_listener.packet_count,
         "last_packet_time": telemetry_listener.last_packet_time,
         "selected_game_id": cfg.get("selected_game_id"),
+        "forward_active": telemetry_listener.forwarder.active,
         "latest_data": latest.to_dict() if latest else None,
     }
 
@@ -310,3 +311,21 @@ async def api_export_game_plugin(plugin_id: str):
 async def api_reload_game_plugins():
     game_plugin_manager.reload()
     return {"ok": True, "count": len(game_plugin_manager.list_all())}
+
+
+# ---- Data Forwarding ----
+@router.get("/forward")
+async def api_list_forward_targets():
+    cfg = get_config()
+    return cfg.get("forward_targets", [])
+
+
+@router.put("/forward")
+async def api_update_forward_targets(data: dict[str, Any]):
+    targets = data.get("targets", [])
+    cfg = get_config()
+    cfg["forward_targets"] = targets
+    from config.settings import save_config
+    save_config(cfg)
+    telemetry_listener.forwarder.reload_targets()
+    return {"ok": True, "active": telemetry_listener.forwarder.active}