feat: add controller update trigger + version checker (v0.1.8)

Hub now tracks controller_url from reports, periodically checks the Gitea
registry for the latest controller image version, and shows a "Trigger Update"
button on the customer detail page that proxies to the controller's self-update
API endpoint using the shared API key.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

hub/cmd/hub/main.go

@@ -42,6 +42,12 @@ type Config struct {
 	Alerting struct {
 		StaleThreshold string `yaml:"stale_threshold"`
 	} `yaml:"alerting"`
+	Registry struct {
+		Image         string `yaml:"image"`
+		Username      string `yaml:"username"`
+		Token         string `yaml:"token"`
+		CheckInterval string `yaml:"check_interval"`
+	} `yaml:"registry"`
 	Server struct {
 		Listen  string `yaml:"listen"`
 		DataDir string `yaml:"data_dir"`
@@ -84,7 +90,7 @@ func main() {
 
 	// Initialize handlers
 	apiHandler := api.New(dataStore, cfg.API.ReportAPIKey, cfg.Notifications.ResendAPIKey, cfg.Notifications.FromEmail, logger)
-	webServer := web.New(dataStore, cfg.Auth.PasswordHash, staleThreshold, logger)
+	webServer := web.New(dataStore, cfg.Auth.PasswordHash, cfg.API.ReportAPIKey, staleThreshold, logger)
 
 	// Build HTTP mux
 	mux := http.NewServeMux()
@@ -114,10 +120,25 @@ func main() {
 		IdleTimeout:  120 * time.Second,
 	}
 
-	// Background: daily prune
+	// Background: daily prune + version checker
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
+	// Initialize version checker for controller image registry
+	var versionChecker *web.VersionChecker
+	if cfg.Registry.Username != "" && cfg.Registry.Token != "" {
+		checkInterval, err := time.ParseDuration(cfg.Registry.CheckInterval)
+		if err != nil {
+			checkInterval = 6 * time.Hour
+		}
+		versionChecker = web.NewVersionChecker(cfg.Registry.Image, cfg.Registry.Username, cfg.Registry.Token, checkInterval, logger)
+		go versionChecker.Run(ctx)
+		logger.Printf("[INFO] Registry version checker started (every %s)", cfg.Registry.CheckInterval)
+	} else {
+		logger.Printf("[INFO] Registry version checker disabled (no credentials configured)")
+	}
+	webServer.SetVersionChecker(versionChecker)
+
 	if cfg.Retention.MaxDays > 0 {
 		go pruneLoop(ctx, dataStore, cfg.Retention.MaxDays, logger)
 	}
@@ -184,6 +205,12 @@ func loadConfig(path string, logger *log.Logger) *Config {
 	if cfg.Notifications.FromEmail == "" {
 		cfg.Notifications.FromEmail = "monitoring@felhom.eu"
 	}
+	if cfg.Registry.Image == "" {
+		cfg.Registry.Image = "gitea.dooplex.hu/admin/felhom-controller"
+	}
+	if cfg.Registry.CheckInterval == "" {
+		cfg.Registry.CheckInterval = "6h"
+	}
 
 	return cfg
 }