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/repository/domain_cache.go

@@ -0,0 +1,64 @@
+package repository
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"strings"
+	"time"
+
+	"evobgp/internal/store"
+
+	"github.com/jackc/pgx/v5"
+)
+
+func (p *Postgres) GetDomainResolveCache(fqdn string) (*store.DomainResolveCacheEntry, bool, error) {
+	key := strings.ToLower(strings.TrimSpace(fqdn))
+	if key == "" {
+		return nil, false, nil
+	}
+	ctx := context.Background()
+	var raw []byte
+	var resolvedAt time.Time
+	err := p.pool.QueryRow(ctx, `
+		SELECT addrs_json, resolved_at FROM domain_resolve_cache WHERE fqdn = $1`, key).
+		Scan(&raw, &resolvedAt)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, false, nil
+		}
+		return nil, false, err
+	}
+	var addrs []string
+	if len(raw) > 0 {
+		_ = json.Unmarshal(raw, &addrs)
+	}
+	return &store.DomainResolveCacheEntry{
+		FQDN:       key,
+		Addrs:      addrs,
+		ResolvedAt: resolvedAt.UTC(),
+	}, true, nil
+}
+
+func (p *Postgres) SetDomainResolveCache(fqdn string, addrs []string) error {
+	key := strings.ToLower(strings.TrimSpace(fqdn))
+	if key == "" {
+		return store.ErrInvalidInput
+	}
+	if addrs == nil {
+		addrs = []string{}
+	}
+	raw, err := json.Marshal(addrs)
+	if err != nil {
+		return err
+	}
+	ctx := context.Background()
+	_, err = p.pool.Exec(ctx, `
+		INSERT INTO domain_resolve_cache (fqdn, addrs_json, resolved_at)
+		VALUES ($1, $2::jsonb, now())
+		ON CONFLICT (fqdn) DO UPDATE SET
+			addrs_json = EXCLUDED.addrs_json,
+			resolved_at = EXCLUDED.resolved_at`,
+		key, string(raw))
+	return err
+}