v0.27.2 — copyable error popups, Tier2 hub reporting, memory bar fixes, new labels

- Replace native alert() with custom showAlert() modal (text selectable)
- Manual Tier2 backup now pushes infra backup to Hub
- CommittedMemory() excludes stopped/exited apps
- Pre-start memory check blocks start if insufficient RAM
- Add hungarian_ui metadata field + "Magyar felület" badge
- Add "USB" badge on storage cards in settings page

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

controller/internal/api/router.go

@@ -43,6 +43,9 @@ type Router struct {
 	// OnConfigApplied is called after a successful config apply (e.g., to push infra backup).
 	OnConfigApplied func()
 
+	// OnCrossDriveComplete is called after a manual cross-drive backup completes (to push infra backup to Hub).
+	OnCrossDriveComplete func()
+
 	// Asset syncer for on-demand Hub asset sync
 	assetsSyncer *assets.Syncer
 
@@ -327,6 +330,26 @@ func (r *Router) actionStack(w http.ResponseWriter, action, name string) {
 		return
 	}
 
+	// Memory check before starting a stopped app
+	if action == "start" {
+		stackMemMB := r.stackMgr.StackMemoryMB(name)
+		if stackMemMB > 0 {
+			if totalMB, memErr := system.GetTotalMemoryMB(); memErr == nil {
+				reservedMB := r.cfg.System.ReservedMemoryMB
+				usableMB := totalMB - reservedMB
+				committedReqMB, _ := r.stackMgr.CommittedMemory()
+				afterMB := committedReqMB + stackMemMB
+				if afterMB > usableMB {
+					writeJSON(w, http.StatusConflict, apiResponse{
+						OK:    false,
+						Error: fmt.Sprintf("Nincs elég memória az indításhoz. Szükséges: %d MB, elérhető: %d MB (foglalt: %d MB / használható: %d MB)", stackMemMB, usableMB-committedReqMB, committedReqMB, usableMB),
+					})
+					return
+				}
+			}
+		}
+	}
+
 	var err error
 	switch action {
 	case "start":
@@ -807,6 +830,9 @@ func (r *Router) triggerCrossBackup(w http.ResponseWriter, req *http.Request, na
 		if err := r.crossDriveRunner.RunAppBackup(context.Background(), name); err != nil {
 			r.logger.Printf("[API] Cross-drive backup failed for %s: %v", name, err)
 		}
+		if r.OnCrossDriveComplete != nil {
+			r.OnCrossDriveComplete()
+		}
 	}()
 
 	writeJSON(w, http.StatusOK, apiResponse{OK: true, Message: "Mentés elindítva"})
@@ -849,6 +875,9 @@ func (r *Router) triggerAllCrossBackups(w http.ResponseWriter, _ *http.Request)
 		if err := r.crossDriveRunner.RunAllScheduled(ctx, "manual"); err != nil {
 			r.logger.Printf("[API] Cross-drive run-all manual error: %v", err)
 		}
+		if r.OnCrossDriveComplete != nil {
+			r.OnCrossDriveComplete()
+		}
 	}()
 	writeJSON(w, http.StatusOK, apiResponse{OK: true, Message: "Összes mentés elindítva"})
 }