v0.10.0: Phase B — Storage Management UI Polish & Health Severity Fix

- Health severity fix: mount-point check downgraded from issue (FAIL) to warning (WARN)
- All storage health messages translated to Hungarian
- Success flash messages for all storage operations
- Edit storage path labels (inline edit UI + backend)
- App details per storage path on settings page (expandable list with names + sizes)
- Storage badge on stacks page showing which storage each app uses
- Deploy dropdown with free space display and low-space warning (<20%)
- Filesystem & disk info on settings page (ext4/btrfs, device, model via findmnt)
- Backup page storage context with per-app storage label badges

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

controller/internal/web/templates/stacks.html

@@ -43,6 +43,7 @@
             {{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 and .Deployed (index $.StorageLabels .Name)}}<span class="meta-badge meta-badge-storage" title="Adattároló: {{index $.StorageLabels .Name}}">💾 {{index $.StorageLabels .Name}}</span>{{end}}
         </div>
 
         {{if .Containers}}