fix: Complete AgentHealth improvements and build fixes

- Update Update scanner default from 15min to 12 hours (backend)
- Add 1 week and 2 week frequency options (frontend)
- Rename AgentScanners to AgentHealth component
- Add OS-aware package manager badges (APT, DNF, Windows/Winget, Docker)
- Fix all build errors (types, imports, storage metrics)
- Add useMemo optimization for enabled/auto-run counts

aggregator-server/internal/database/queries/storage_metrics.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
-	"time"
 
 	"github.com/Fimeg/RedFlag/aggregator-server/internal/models"
 	"github.com/google/uuid"
@@ -136,7 +135,7 @@ func (q *StorageMetricsQueries) GetLatestStorageMetrics(ctx context.Context, age
 // GetStorageMetricsSummary returns summary statistics for an agent
 func (q *StorageMetricsQueries) GetStorageMetricsSummary(ctx context.Context, agentID uuid.UUID) (map[string]interface{}, error) {
 	query := `
-		SELECT 
+		SELECT
 			COUNT(*) as total_disks,
 			COUNT(CASE WHEN severity = 'critical' THEN 1 END) as critical_disks,
 			COUNT(CASE WHEN severity = 'important' THEN 1 END) as important_disks,
@@ -149,19 +148,38 @@ func (q *StorageMetricsQueries) GetStorageMetricsSummary(ctx context.Context, ag
 		  AND created_at >= NOW() - INTERVAL '24 hours'
 	`
 
-	var summary map[string]interface{}
+	var (
+		totalDisks       int
+		criticalDisks    int
+		importantDisks   int
+		avgUsedPercent   sql.NullFloat64
+		maxUsedPercent   sql.NullFloat64
+		firstCollectedAt sql.NullTime
+		lastCollectedAt  sql.NullTime
+	)
+
 	err := q.db.QueryRowContext(ctx, query, agentID).Scan(
-		&summary["total_disks"],
-		&summary["critical_disks"],
-		&summary["important_disks"],
-		&summary["avg_used_percent"],
-		&summary["max_used_percent"],
-		&summary["first_collected_at"],
-		&summary["last_collected_at"],
+		&totalDisks,
+		&criticalDisks,
+		&importantDisks,
+		&avgUsedPercent,
+		&maxUsedPercent,
+		&firstCollectedAt,
+		&lastCollectedAt,
 	)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get storage metrics summary: %w", err)
 	}
 
+	summary := map[string]interface{}{
+		"total_disks":        totalDisks,
+		"critical_disks":     criticalDisks,
+		"important_disks":    importantDisks,
+		"avg_used_percent":   avgUsedPercent.Float64,
+		"max_used_percent":   maxUsedPercent.Float64,
+		"first_collected_at": firstCollectedAt.Time,
+		"last_collected_at":  lastCollectedAt.Time,
+	}
+
 	return summary, nil
-}
+}