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/web/templates/stacks.html

@@ -44,6 +44,7 @@
             {{if .Meta.Resources.MemRequest}}<span class="meta-badge">~{{.Meta.Resources.MemRequest}}</span>{{end}}
             {{if .Meta.Resources.PiCompatible}}<span class="meta-badge meta-badge-ok">Pi kompatibilis</span>{{end}}
             {{if .Meta.Resources.NeedsHDD}}<span class="meta-badge">HDD szükséges</span>{{end}}
+            {{if .Meta.Resources.HungarianUI}}<span class="meta-badge meta-badge-ok">Magyar felület</span>{{end}}
             {{if and .Deployed (index $.StorageLabels .Name)}}<span class="meta-badge meta-badge-storage" title="Adattároló: {{index $.StorageLabels .Name}}">💾 {{index $.StorageLabels .Name}}</span>{{end}}
         </div>