refactor(web): remove deprecated dashboard components and enhance KPI grid

- Deleted unused components: `DashboardActivityTimeline`, `DashboardFramePanel`, `DashboardModulesGrid`, `DashboardRecentJobsGrid`, and `DashboardRecentRevisionsGrid` to streamline the dashboard.
- Updated `DashboardKpiGrid` to improve KPI display logic, including progress indicators and enhanced badge functionality.
- Refactored `DashboardNetworkHealth` to provide better status representation based on loading states and network conditions.
- Introduced new properties for KPI cards to support progress tracking and improved visual feedback.

This cleanup aims to enhance performance and maintainability of the dashboard while providing a better user experience.

internal/pipeline/cdn_prefetch_test.go

@@ -5,7 +5,9 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"strings"
+	"sync/atomic"
 	"testing"
+	"time"
 
 	"evobgp/internal/store"
 )
@@ -194,3 +196,63 @@ func TestCollectModulePrefixRows_CDN304RetriesWithoutETag(t *testing.T) {
 		t.Fatalf("unexpected collected rows: %+v", collected)
 	}
 }
+
+func TestPrefetchCDNSourceETags_SkipsFreshSources(t *testing.T) {
+	t.Setenv("EVOBGP_CDN_ALLOW_PRIVATE", "1")
+	m := store.NewMemory()
+	m.SeedDemo()
+	tenant, _, _, _, _ := m.DemoIDs()
+
+	mod, err := m.CreateModule(tenant, &store.Module{
+		Type:    "CDN_CIDRS",
+		Name:    "cdn-prefetch-due",
+		Enabled: true,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var hits atomic.Int32
+	srv := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		hits.Add(1)
+		w.Header().Set("ETag", `"v1"`)
+		_, _ = w.Write([]byte("198.51.100.0/24\n"))
+	}))
+	defer srv.Close()
+
+	// Fresh source: refreshed 30s ago with a 3600s interval — prefetch must skip it.
+	freshAt := time.Now().UTC().Add(-30 * time.Second)
+	interval := 3600
+	if _, err := m.CreateCDNSource(tenant, mod.ID, &store.CDNSource{
+		SourceKind:         "txt",
+		URL:                srv.URL,
+		RefreshIntervalSec: &interval,
+		LastRefreshedAt:    &freshAt,
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := PrefetchCDNSourceETags(context.Background(), m, srv.Client()); err != nil {
+		t.Fatal(err)
+	}
+	if hits.Load() != 0 {
+		t.Fatalf("fresh source must be skipped by prefetch, got %d HTTP hits", hits.Load())
+	}
+
+	// Stale source: last refresh older than its interval — prefetch must probe it.
+	staleAt := time.Now().UTC().Add(-7200 * time.Second)
+	if _, err := m.CreateCDNSource(tenant, mod.ID, &store.CDNSource{
+		SourceKind:         "txt",
+		URL:                srv.URL + "?stale",
+		RefreshIntervalSec: &interval,
+		LastRefreshedAt:    &staleAt,
+	}); err != nil {
+		t.Fatal(err)
+	}
+	if err := PrefetchCDNSourceETags(context.Background(), m, srv.Client()); err != nil {
+		t.Fatal(err)
+	}
+	if hits.Load() == 0 {
+		t.Fatal("stale source must be probed by prefetch")
+	}
+}