feat: add controller self-update mechanism (v0.16.0)

New selfupdate package: version parsing, audit state file, updater with
Gitea registry V2 check, docker pull + compose rewrite + compose up flow.

- API: /api/selfupdate/{status,check,update} with session+bearer auth
- UI: Settings "Verzió és frissítés" card with check/install buttons + JS polling
- Scheduler: periodic check (6h default) + optional daily auto-update
- Notifications: success/failure on post-update startup verification
- Alert: info banner when update available
- docker-compose.yml: add directory bind mount for compose file access

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

controller/internal/web/alerts.go

@@ -40,7 +40,7 @@ func NewAlertManager(logger *log.Logger) *AlertManager {
 
 // Refresh regenerates alerts from the latest health check report and config state.
 // Called after each health check cycle (every 5 minutes).
-func (am *AlertManager) Refresh(report *monitor.HealthReport, cfg *config.Config, backupMgr *backup.Manager) {
+func (am *AlertManager) Refresh(report *monitor.HealthReport, cfg *config.Config, backupMgr *backup.Manager, updateAvailable bool, latestVersion string) {
 	var alerts []Alert
 
 	// From health check issues (critical)
@@ -97,6 +97,17 @@ func (am *AlertManager) Refresh(report *monitor.HealthReport, cfg *config.Config
 		})
 	}
 
+	// Update available
+	if updateAvailable && latestVersion != "" {
+		alerts = append(alerts, Alert{
+			ID:       "update-available",
+			Level:    "info",
+			Message:  fmt.Sprintf("Új controller verzió elérhető: %s", latestVersion),
+			Link:     "/settings",
+			LinkText: "Frissítés",
+		})
+	}
+
 	// Sort: errors first, then warnings, then info
 	sortAlerts(alerts)
 

controller/internal/web/handlers.go

@@ -906,6 +906,25 @@ func (s *Server) settingsData() map[string]interface{} {
 	data["MonitoringEnabled"] = s.cfg.Monitoring.Enabled
 	data["HealthchecksBase"] = s.cfg.Monitoring.HealthchecksBase
 	data["HubEnabled"] = s.cfg.Hub.Enabled
+
+	// Self-update status
+	data["SelfUpdateEnabled"] = s.cfg.SelfUpdate.Enabled
+	if s.updater != nil {
+		status := s.updater.GetStatus()
+		data["UpdateRunning"] = status.Running
+		if status.LastCheck != nil {
+			data["UpdateAvailable"] = status.LastCheck.UpdateAvailable
+			data["LatestVersion"] = status.LastCheck.LatestVersion
+			data["LastCheckTime"] = status.LastCheck.CheckedAt
+			data["LastCheckError"] = status.LastCheck.Error
+		}
+		if status.LastState != nil {
+			data["LastUpdateState"] = status.LastState
+		}
+		data["AutoUpdateEnabled"] = s.cfg.SelfUpdate.AutoUpdate
+		data["AutoUpdateTime"] = s.cfg.SelfUpdate.AutoUpdateTime
+	}
+
 	data["NotificationPrefs"] = s.settings.GetNotificationPrefs()
 
 	// Storage paths with display data

controller/internal/web/server.go

@@ -14,6 +14,7 @@ import (
 	"gitea.dooplex.hu/admin/felhom-controller/internal/config"
 	"gitea.dooplex.hu/admin/felhom-controller/internal/notify"
 	"gitea.dooplex.hu/admin/felhom-controller/internal/scheduler"
+	"gitea.dooplex.hu/admin/felhom-controller/internal/selfupdate"
 	"gitea.dooplex.hu/admin/felhom-controller/internal/settings"
 	"gitea.dooplex.hu/admin/felhom-controller/internal/stacks"
 	"gitea.dooplex.hu/admin/felhom-controller/internal/system"
@@ -29,6 +30,7 @@ type Server struct {
 	settings         *settings.Settings
 	alertManager     *AlertManager
 	notifier         *notify.Notifier
+	updater          *selfupdate.Updater
 	logger           *log.Logger
 	version          string
 	tmpl             *template.Template
@@ -49,7 +51,7 @@ type Server struct {
 	restorePlan *backup.RestorePlan
 }
 
-func NewServer(cfg *config.Config, stackMgr *stacks.Manager, cpuCollector *system.CPUCollector, backupMgr *backup.Manager, crossDrive *backup.CrossDriveRunner, sched *scheduler.Scheduler, sett *settings.Settings, alertMgr *AlertManager, notif *notify.Notifier, logger *log.Logger, version string) *Server {
+func NewServer(cfg *config.Config, stackMgr *stacks.Manager, cpuCollector *system.CPUCollector, backupMgr *backup.Manager, crossDrive *backup.CrossDriveRunner, sched *scheduler.Scheduler, sett *settings.Settings, alertMgr *AlertManager, notif *notify.Notifier, updater *selfupdate.Updater, logger *log.Logger, version string) *Server {
 	s := &Server{
 		cfg:              cfg,
 		stackMgr:         stackMgr,
@@ -60,6 +62,7 @@ func NewServer(cfg *config.Config, stackMgr *stacks.Manager, cpuCollector *syste
 		settings:         sett,
 		alertManager:     alertMgr,
 		notifier:         notif,
+		updater:          updater,
 		logger:           logger,
 		version:          version,
 		sessions:         make(map[string]*session),

controller/internal/web/templates/settings.html

@@ -56,13 +56,144 @@
             <span class="settings-label">Hub jelentés</span>
             <span class="settings-value">{{if .HubEnabled}}<span class="state-text-green">✅ Aktív</span>{{else}}–{{end}}</span>
         </div>
-        <div class="settings-row">
-            <span class="settings-label">Controller verzió</span>
-            <span class="settings-value mono">{{.Version}}</span>
-        </div>
     </div>
 </div>
 
+<!-- Section: Version & Update -->
+<div class="settings-card">
+    <h3>Verzió és frissítés</h3>
+    <div class="settings-grid">
+        <div class="settings-row">
+            <span class="settings-label">Jelenlegi verzió</span>
+            <span class="settings-value mono">{{.Version}}</span>
+        </div>
+        {{if .SelfUpdateEnabled}}
+        {{if .LatestVersion}}
+        <div class="settings-row">
+            <span class="settings-label">Legújabb verzió</span>
+            <span class="settings-value mono">
+                {{.LatestVersion}}
+                {{if .UpdateAvailable}}
+                <span class="state-text-green" style="margin-left:0.5em;">● Frissítés elérhető</span>
+                {{else}}
+                <span style="margin-left:0.5em; color:#888;">— naprakész</span>
+                {{end}}
+            </span>
+        </div>
+        {{end}}
+        {{if .LastCheckTime}}
+        <div class="settings-row">
+            <span class="settings-label">Utolsó ellenőrzés</span>
+            <span class="settings-value mono">{{.LastCheckTime}}</span>
+        </div>
+        {{end}}
+        {{if .LastCheckError}}
+        <div class="settings-row">
+            <span class="settings-label">Hiba</span>
+            <span class="settings-value state-text-red">{{.LastCheckError}}</span>
+        </div>
+        {{end}}
+        <div class="settings-row">
+            <span class="settings-label">Automatikus frissítés</span>
+            <span class="settings-value">
+                {{if .AutoUpdateEnabled}}<span class="state-text-green">✅ Aktív</span> <span class="mono">({{.AutoUpdateTime}})</span>{{else}}–{{end}}
+            </span>
+        </div>
+        {{with .LastUpdateState}}
+        <div class="settings-row">
+            <span class="settings-label">Utolsó frissítés</span>
+            <span class="settings-value">
+                {{if eq .Status "success"}}<span class="state-text-green">✅ Sikeres</span> ({{.PreviousVersion}} → {{.TargetVersion}})
+                {{else if eq .Status "failed"}}<span class="state-text-red">❌ Sikertelen</span> — {{.Error}}
+                {{else if eq .Status "pending"}}<span class="state-text-yellow">⏳ Folyamatban</span>
+                {{end}}
+            </span>
+        </div>
+        {{end}}
+        <div class="settings-row" style="padding-top: 0.5em;">
+            <span class="settings-label"></span>
+            <span class="settings-value">
+                <button class="btn btn-secondary btn-sm" id="btn-check-update" onclick="checkUpdate()">Frissítés keresése</button>
+                {{if .UpdateAvailable}}
+                <button class="btn btn-primary btn-sm" id="btn-trigger-update" onclick="triggerUpdate()" style="margin-left:0.5em;">Frissítés telepítése</button>
+                {{end}}
+                <span id="update-status-msg" style="margin-left:0.5em; display:none;"></span>
+            </span>
+        </div>
+        {{end}}
+    </div>
+</div>
+
+<script>
+function checkUpdate() {
+    var btn = document.getElementById('btn-check-update');
+    var msg = document.getElementById('update-status-msg');
+    btn.disabled = true;
+    btn.textContent = 'Ellenőrzés...';
+    msg.style.display = 'none';
+    fetch('/api/selfupdate/check', {method:'POST'})
+        .then(function(r) { return r.json(); })
+        .then(function(data) {
+            if (data.ok) {
+                location.reload();
+            } else {
+                msg.textContent = data.error || 'Hiba történt';
+                msg.style.display = 'inline';
+                btn.disabled = false;
+                btn.textContent = 'Frissítés keresése';
+            }
+        })
+        .catch(function() {
+            msg.textContent = 'Kapcsolódási hiba';
+            msg.style.display = 'inline';
+            btn.disabled = false;
+            btn.textContent = 'Frissítés keresése';
+        });
+}
+
+function triggerUpdate() {
+    if (!confirm('Biztosan frissíti a controllert?\n\nA folyamat alatt a vezérlőpult rövid időre elérhetetlenné válik.')) return;
+    var btn = document.getElementById('btn-trigger-update');
+    var checkBtn = document.getElementById('btn-check-update');
+    var msg = document.getElementById('update-status-msg');
+    btn.disabled = true;
+    btn.textContent = 'Frissítés...';
+    if (checkBtn) checkBtn.disabled = true;
+    msg.textContent = 'Frissítés folyamatban...';
+    msg.style.display = 'inline';
+    fetch('/api/selfupdate/update', {method:'POST'})
+        .then(function(r) { return r.json(); })
+        .then(function(data) {
+            if (data.ok) {
+                msg.textContent = 'Újraindulás...';
+                pollUntilBack();
+            } else {
+                msg.textContent = data.error || 'Hiba történt';
+                btn.disabled = false;
+                btn.textContent = 'Frissítés telepítése';
+                if (checkBtn) checkBtn.disabled = false;
+            }
+        })
+        .catch(function() {
+            msg.textContent = 'Kapcsolódási hiba';
+            pollUntilBack();
+        });
+}
+
+function pollUntilBack() {
+    var iv = setInterval(function() {
+        fetch('/api/health')
+            .then(function(r) {
+                if (r.ok) {
+                    clearInterval(iv);
+                    location.reload();
+                }
+            })
+            .catch(function() {});
+    }, 3000);
+}
+</script>
+
 <!-- Section: Storage Paths -->
 <div class="settings-card">
     <h3>Adattárolók</h3>