fix: skip target database check for cluster restores

- Cluster restores restore multiple databases, not a single target
- Database existence check was failing with exit status 2
- Now shows "Will restore all databases from cluster backup" instead
- Removes confusing warning for cluster restore operations

internal/tui/restore_preview.go

@@ -146,7 +146,8 @@ func runSafetyChecks(cfg *config.Config, log logger.Logger, archive ArchiveInfo,
 		}
 		checks = append(checks, check)
 
-		// 4. Target database check
+		// 4. Target database check (skip for cluster restores)
+		if !archive.Format.IsClusterBackup() {
 			check = SafetyCheck{Name: "Target database", Status: "checking", Critical: false}
 			exists, err := safety.CheckDatabaseExists(ctx, targetDB)
 			if err != nil {
@@ -160,6 +161,12 @@ func runSafetyChecks(cfg *config.Config, log logger.Logger, archive ArchiveInfo,
 				check.Message = fmt.Sprintf("Database '%s' does not exist - will be created", targetDB)
 			}
 			checks = append(checks, check)
+		} else {
+			// For cluster restores, just show a general message
+			check = SafetyCheck{Name: "Cluster restore", Status: "passed", Critical: false}
+			check.Message = "Will restore all databases from cluster backup"
+			checks = append(checks, check)
+		}
 
 		return safetyCheckCompleteMsg{checks: checks, canProceed: canProceed}
 	}