v0.15.1: Backup page Részletek overhaul with per-drive tier sections

Replace Tároló section with collapsible Részletek containing 3 tiers:
- Tier 1: per-drive restic repo stats with storage labels
- Tier 2: cross-drive items grouped by destination, split by method
- Tier 3: remote backup placeholder
Restore UI now shows tier + drive labels in snapshot dropdown.

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

controller/internal/api/router.go

@@ -451,17 +451,25 @@ func (r *Router) backupSnapshots(w http.ResponseWriter, req *http.Request) {
 		return
 	}
 
-	snapshots, err := r.backupMgr.ListSnapshots(50)
+	snapshots, err := r.backupMgr.ListAllSnapshots(50)
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, apiResponse{OK: false, Error: err.Error()})
 		return
 	}
 
-	// All snapshots contain the stacks dir + DB dumps, so they're useful for
-	// any app (config + DB restore). Apps with HDD data get user data restored
-	// too — but only from snapshots that include those paths (post-v0.12.7).
-	// We don't filter here because older snapshots still allow config+DB restore,
-	// and the RestoreApp function extracts whatever paths are available.
+	// Enrich snapshots with drive labels from storage paths
+	if r.sett != nil {
+		storagePaths := r.sett.GetStoragePaths()
+		for i := range snapshots {
+			repoPath := snapshots[i].RepoPath
+			for _, sp := range storagePaths {
+				if strings.HasPrefix(repoPath, sp.Path) {
+					snapshots[i].DriveLabel = sp.Label
+					break
+				}
+			}
+		}
+	}
 
 	if snapshots == nil {
 		snapshots = []backup.SnapshotInfo{}