updates

controller/cmd/controller/main.go

@@ -101,7 +101,8 @@ func main() {
 	}()
 
 	// --- Start background tasks ---
-	// Periodic stack status refresh
+
+	// Periodic container status refresh (lightweight — just runs docker ps)
 	go func() {
 		ticker := time.NewTicker(30 * time.Second)
 		defer ticker.Stop()
@@ -117,6 +118,26 @@ func main() {
 		}
 	}()
 
+	// Periodic stack scan (discovers new/removed stacks from disk)
+	// Runs less frequently since it reads the filesystem.
+	// This allows adding new stacks without restarting the controller.
+	go func() {
+		ticker := time.NewTicker(2 * time.Minute)
+		defer ticker.Stop()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-ticker.C:
+				if err := stackMgr.ScanStacks(); err != nil {
+					logger.Printf("[WARN] Periodic stack scan failed: %v", err)
+				} else {
+					logger.Printf("[DEBUG] Periodic stack scan completed")
+				}
+			}
+		}
+	}()
+
 	logger.Printf("[INFO] Web UI listening on %s", cfg.Web.Listen)
 	if err := server.ListenAndServe(); err != http.ErrServerClosed {
 		logger.Fatalf("[FATAL] HTTP server error: %v", err)
@@ -134,4 +155,4 @@ func setupLogger(cfg *config.Config) *log.Logger {
 	}
 
 	return logger
-}
+}