Set dev SignalR hub URL

Makefile

@@ -37,6 +37,7 @@ PNPM := pnpm
 PID_FILE := .dev.pid
 LOG_FILE := .dev.log
 API_TARGET ?= https://flights.test.aeroflot.ru
+SIGNALR_HUB_URL ?= https://platform.test.aeroflot.ru/tracker/hub
 
 # Development
 dev:
@@ -47,10 +48,11 @@ dev:
 
 dev-full:
 	@echo "Starting dev server with API proxy in background..."
-	@API_TARGET="$(API_TARGET)" nohup $(PNPM) dev:full > $(LOG_FILE) 2>&1 & echo $$! > $(PID_FILE)
+	@API_TARGET="$(API_TARGET)" SIGNALR_HUB_URL="$(SIGNALR_HUB_URL)" nohup $(PNPM) dev:full > $(LOG_FILE) 2>&1 & echo $$! > $(PID_FILE)
 	@echo "Dev server started (PID: $$(cat $(PID_FILE)))"
 	@echo "  App & API:  http://localhost:8080"
 	@echo "  API target: $(API_TARGET)"
+	@echo "  SignalR hub: $(SIGNALR_HUB_URL)"
 	@echo "View logs: make logs"
 
 stop: