feat(TrafficDashboard): add summary statistics and visual representation for traffic data across all systems

frontend/src/TrafficDashboard.jsx

@@ -182,6 +182,44 @@ export default function TrafficDashboard() {
     fetchStats();
   }, [fetchStats]);
 
+  // Суммарная статистика по всем отображаемым системам (без ошибок, с данными)
+  const summary = (() => {
+    const withData = (jumphosts || []).filter((jh) => !jh.error && Array.isArray(jh.interfaces) && jh.interfaces.length > 0);
+    let totalBytes = 0;
+    let totalRx = 0;
+    let totalTx = 0;
+    const byJumphost = [];
+    for (const jh of withData) {
+      let jhTotal = 0;
+      let jhRx = 0;
+      let jhTx = 0;
+      for (const i of jh.interfaces) {
+        jhTotal += i.totalBytes || 0;
+        jhRx += i.rxBytes || 0;
+        jhTx += i.txBytes || 0;
+      }
+      totalBytes += jhTotal;
+      totalRx += jhRx;
+      totalTx += jhTx;
+      if (jhTotal > 0) {
+        byJumphost.push({
+          name: jh.name || jh.host || 'Jumphost',
+          value: jhTotal,
+          fill: CHART_COLORS[byJumphost.length % CHART_COLORS.length],
+        });
+      }
+    }
+    return {
+      totalBytes,
+      totalRx,
+      totalTx,
+      systemsCount: withData.length,
+      byJumphost,
+    };
+  })();
+
+  const hasSummary = summary.systemsCount > 0 && summary.totalBytes > 0;
+
   return (
     <div>
       <PageHeader
@@ -217,13 +255,92 @@ export default function TrafficDashboard() {
         </div>
       )}
       {!loading && jumphosts.length > 0 && (
-        <div className="row row-cards g-3">
-          {jumphosts.map((jh) => (
-            <div key={jh.serverId || jh.host || jh.name} className="col-12 col-md-6 col-xl-4">
-              <JumphostCard jumphost={jh} />
+        <>
+          {hasSummary && (
+            <div className="card mb-4">
+              <div className="card-header">
+                <h3 className="card-title mb-0">Суммарно по всем системам</h3>
+              </div>
+              <div className="card-body">
+                <div className="d-flex flex-wrap align-items-stretch gap-4">
+                  <div className="position-relative flex-shrink-0" style={{ width: 220, height: 220 }}>
+                    <ResponsiveContainer width={220} height={220}>
+                      <PieChart margin={{ top: 0, right: 0, bottom: 0, left: 0 }}>
+                        <Pie
+                          data={summary.byJumphost}
+                          dataKey="value"
+                          nameKey="name"
+                          cx="50%"
+                          cy="50%"
+                          innerRadius={58}
+                          outerRadius={98}
+                          paddingAngle={0}
+                          stroke="none"
+                        >
+                          {summary.byJumphost.map((entry, index) => (
+                            <Cell key={`cell-${index}`} fill={entry.fill} />
+                          ))}
+                        </Pie>
+                        <Tooltip formatter={(value) => formatBytes(value)} />
+                      </PieChart>
+                    </ResponsiveContainer>
+                    <div
+                      className="position-absolute top-50 start-50 translate-middle text-center text-body"
+                      style={{ pointerEvents: 'none', width: '55%' }}
+                    >
+                      <div className="fw-bold lh-1" style={{ fontSize: '1.35rem' }}>
+                        {formatBytes(summary.totalBytes)}
+                      </div>
+                      <div className="text-muted small mt-1" style={{ fontSize: '0.7rem', letterSpacing: '0.02em' }}>
+                        TRAFFIC
+                      </div>
+                    </div>
+                  </div>
+                  <div className="d-flex flex-wrap gap-4 align-items-center flex-grow-1">
+                    <div className="traffic-summary-legend">
+                      {summary.byJumphost.map((item) => (
+                        <div key={item.name} className="d-flex align-items-center mb-2 small">
+                          <span
+                            className="flex-shrink-0 rounded"
+                            style={{ width: 10, height: 10, backgroundColor: item.fill }}
+                          />
+                          <span className="ms-2">
+                            {item.name} - {formatBytes(item.value)}
+                          </span>
+                        </div>
+                      ))}
+                    </div>
+                    <div className="d-flex flex-wrap gap-3 ms-md-auto">
+                      <div className="px-3 py-2 rounded bg-blue-lt text-blue">
+                        <span className="d-block small text-muted">Всего трафика</span>
+                        <span className="fw-bold">{formatBytes(summary.totalBytes)}</span>
+                      </div>
+                      <div className="px-3 py-2 rounded bg-green-lt text-green">
+                        <span className="d-block small text-muted">RX</span>
+                        <span className="fw-bold">{formatBytes(summary.totalRx)}</span>
+                      </div>
+                      <div className="px-3 py-2 rounded bg-orange-lt text-orange">
+                        <span className="d-block small text-muted">TX</span>
+                        <span className="fw-bold">{formatBytes(summary.totalTx)}</span>
+                      </div>
+                      <div className="px-3 py-2 rounded bg-azure-lt text-azure">
+                        <span className="d-block small text-muted">Систем</span>
+                        <span className="fw-bold">{summary.systemsCount}</span>
+                      </div>
+                    </div>
+                  </div>
+                </div>
+              </div>
             </div>
-          ))}
-        </div>
+          )}
+          <div className="row row-cards g-3">
+            {jumphosts.map((jh) => (
+              <div key={jh.serverId || jh.host || jh.name} className="col-12 col-md-6 col-xl-4">
+                <JumphostCard jumphost={jh} />
+              </div>
+            ))}
+          </div>
+        </>
       )}
     </div>
   );