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/settings.html

@@ -69,6 +69,7 @@
     <p class="settings-card-desc">Külső meghajtók kezelése alkalmazásadatok tárolásához.</p>
 
     {{if .StorageError}}<div class="alert alert-error">{{.StorageError}}</div>{{end}}
+    {{if .StorageSuccess}}<div class="alert alert-info">{{.StorageSuccess}}</div>{{end}}
 
     {{if .StoragePaths}}
     <div class="storage-paths-list">
@@ -76,7 +77,10 @@
         <div class="storage-path-item">
             <div class="storage-path-header">
                 <div class="storage-path-info">
-                    <span class="storage-path-label">{{.Label}}</span>
+                    <div class="storage-path-label-wrap" id="label-wrap-{{.Path}}">
+                        <span class="storage-path-label" id="label-display-{{.Path}}">{{.Label}}</span>
+                        <button class="btn btn-xs btn-ghost" onclick="editStorageLabel('{{.Path}}', '{{.Label}}')" title="Átnevezés">✏️</button>
+                    </div>
                     <span class="storage-path-path mono">{{.Path}}</span>
                 </div>
                 <div class="storage-path-badges">
@@ -97,8 +101,29 @@
                     </div>
                 </div>
                 {{end}}
+                {{if .FSInfo}}
+                <div class="storage-path-fsinfo mono form-hint">
+                    {{.FSInfo.FSType}} · {{.FSInfo.Device}}{{if .FSInfo.Model}} · {{.FSInfo.Model}}{{end}}
+                </div>
+                {{end}}
                 <div class="storage-path-meta">
-                    <span class="form-hint">{{.AppCount}} alkalmazás használja</span>
+                    {{if .AppDetails}}
+                    <details class="storage-app-details">
+                        <summary class="form-hint" style="cursor:pointer">
+                            {{.AppCount}} alkalmazás használja
+                        </summary>
+                        <div class="storage-app-list">
+                            {{range .AppDetails}}
+                            <div class="storage-app-row">
+                                <a href="/apps/{{.Stack}}" class="storage-app-link">{{.Name}}</a>
+                                {{if .SizeHuman}}<span class="mono form-hint">{{.SizeHuman}}</span>{{end}}
+                            </div>
+                            {{end}}
+                        </div>
+                    </details>
+                    {{else}}
+                    <span class="form-hint">Nincs alkalmazás ezen a tárolón</span>
+                    {{end}}
                 </div>
             </div>
             <div class="storage-path-actions">
@@ -246,5 +271,24 @@
     {{end}}
 </div>
 
+<script>
+function editStorageLabel(path, currentLabel) {
+    var wrap = document.getElementById('label-wrap-' + path);
+    if (!wrap) return;
+    wrap.innerHTML = '<form method="POST" action="/settings/storage/label" style="display:inline-flex;gap:.5rem;align-items:center">' +
+        '<input type="hidden" name="storage_path" value="' + path + '">' +
+        '<input type="text" name="storage_label" class="form-control" value="' + currentLabel.replace(/"/g, '&quot;') + '" style="width:200px;padding:.3rem .5rem;font-size:.9rem" maxlength="50">' +
+        '<button type="submit" class="btn btn-xs btn-primary">OK</button>' +
+        '<button type="button" class="btn btn-xs btn-outline" onclick="cancelEditLabel(\'' + path + '\', \'' + currentLabel.replace(/'/g, "\\'") + '\')">✕</button>' +
+        '</form>';
+    wrap.querySelector('input[name=storage_label]').focus();
+}
+function cancelEditLabel(path, label) {
+    var wrap = document.getElementById('label-wrap-' + path);
+    if (!wrap) return;
+    wrap.innerHTML = '<span class="storage-path-label" id="label-display-' + path + '">' + label + '</span>' +
+        ' <button class="btn btn-xs btn-ghost" onclick="editStorageLabel(\'' + path + '\', \'' + label.replace(/'/g, "\\'") + '\')" title="Átnevezés">✏️</button>';
+}
+</script>
 {{template "layout_end" .}}
 {{end}}