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/stacks/metadata.go

@@ -54,6 +54,7 @@ type ResourceHints struct {
 	MemLimit      string `yaml:"mem_limit" json:"mem_limit"`
 	PiCompatible  bool   `yaml:"pi_compatible" json:"pi_compatible"`
 	NeedsHDD      bool   `yaml:"needs_hdd" json:"needs_hdd"`
+	HungarianUI   bool   `yaml:"hungarian_ui" json:"hungarian_ui"`
 }
 
 // DeployField defines one configuration field shown during first deployment.