fix(openflare): ClickHouse count scan and dashboard traffic metrics

- Scan ClickHouse count()/countIf() aggregates as uint64 before int64 conversion
- Fix access log list count, region stats, and delete pre-count queries
- Aggregate dashboard 24h traffic totals from hourly trend buckets
- Show current hour value in traffic trend chart summary
- Rename docker-compose service to openflare
- Remove redundant config preview section from performance page

internal/apps/openflare/observability/analytics_test.go

@@ -0,0 +1,54 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package observability
+
+import (
+	"testing"
+	"time"
+
+	"github.com/Rain-kl/Wavelet/internal/model"
+)
+
+func TestBuildTrafficTrendPointsBucketsByHour(t *testing.T) {
+	t.Parallel()
+
+	now := time.Date(2026, 6, 19, 17, 30, 0, 0, time.UTC)
+	reports := []*model.OpenFlareRequestReport{
+		{
+			NodeID:          "node-a",
+			WindowStartedAt: now.Add(-3 * time.Hour),
+			WindowEndedAt:   now.Add(-3*time.Hour + time.Minute),
+			RequestCount:    10,
+			ErrorCount:      1,
+		},
+		{
+			NodeID:          "node-a",
+			WindowStartedAt: now.Add(-30 * time.Minute),
+			WindowEndedAt:   now.Add(-29 * time.Minute),
+			RequestCount:    6,
+			ErrorCount:      0,
+		},
+	}
+
+	points := BuildTrafficTrendPoints(now, reports)
+	if len(points) != observabilityTrendBuckets {
+		t.Fatalf("BuildTrafficTrendPoints() len = %d, want %d", len(points), observabilityTrendBuckets)
+	}
+
+	var totalRequests int64
+	for _, point := range points {
+		totalRequests += point.RequestCount
+	}
+	if totalRequests != 16 {
+		t.Fatalf("total request_count = %d, want 16", totalRequests)
+	}
+
+	currentHour := points[len(points)-1]
+	if currentHour.RequestCount != 6 {
+		t.Fatalf("current hour request_count = %d, want 6", currentHour.RequestCount)
+	}
+	if currentHour.ErrorCount != 0 {
+		t.Fatalf("current hour error_count = %d, want 0", currentHour.ErrorCount)
+	}
+}