Add connection duration and reconnect count to status page

- Track reconnection count in metrics tracker
- Display connection duration under Stream Statistics
- Display reconnect count since app startup
- Update both JSON API and HTML status page

internal/metrics/metrics.go

@@ -15,6 +15,7 @@ type Tracker struct {
 	registry       metrics.Registry
 	connectedSince time.Time
 	isConnected    atomic.Bool
+	reconnectCount atomic.Uint64
 
 	// Stream metrics (decompressed data)
 	messageCounter metrics.Counter
@@ -50,13 +51,22 @@ func New() *Tracker {
 
 // SetConnected updates the connection status
 func (t *Tracker) SetConnected(connected bool) {
-	t.isConnected.Store(connected)
+	wasConnected := t.isConnected.Swap(connected)
 	if connected {
 		t.mu.Lock()
 		t.connectedSince = time.Now()
 		t.mu.Unlock()
+		// Increment reconnect count (but not for the initial connection)
+		if wasConnected || t.reconnectCount.Load() > 0 {
+			t.reconnectCount.Add(1)
 		}
 	}
+}
+
+// GetReconnectCount returns the number of reconnections since startup
+func (t *Tracker) GetReconnectCount() uint64 {
+	return t.reconnectCount.Load()
+}
 
 // IsConnected returns the current connection status
 func (t *Tracker) IsConnected() bool {
@@ -110,6 +120,7 @@ func (t *Tracker) GetStreamMetrics() StreamMetrics {
 		MessagesPerSec: t.messageRate.Rate1(),
 		BitsPerSec:     t.byteRate.Rate1() * bitsPerByte,
 		WireBitsPerSec: t.wireByteRate.Rate1() * bitsPerByte,
+		ReconnectCount: t.reconnectCount.Load(),
 	}
 }
 
@@ -149,6 +160,8 @@ type StreamMetrics struct {
 	BitsPerSec float64
 	// WireBitsPerSec is the rate of bits received on the wire per second (1-minute average)
 	WireBitsPerSec float64
+	// ReconnectCount is the number of reconnections since startup
+	ReconnectCount uint64
 }
 
 // RouteMetrics contains route update statistics

internal/server/handlers.go

@@ -330,6 +330,8 @@ func (s *Server) handleStats() http.HandlerFunc {
 		MbitsPerSec            float64                       `json:"mbits_per_sec"`
 		WireMbitsPerSec        float64                       `json:"wire_mbits_per_sec"`
 		Connected              bool                          `json:"connected"`
+		ConnectionDuration     string                        `json:"connection_duration"`
+		ReconnectCount         uint64                        `json:"reconnect_count"`
 		GoVersion              string                        `json:"go_version"`
 		Goroutines             int                           `json:"goroutines"`
 		MemoryUsage            string                        `json:"memory_usage"`
@@ -442,6 +444,12 @@ func (s *Server) handleStats() http.HandlerFunc {
 			whoisStats = s.getWHOISStats(ctx)
 		}
 
+		// Calculate connection duration
+		connectionDuration := "disconnected"
+		if metrics.Connected && !metrics.ConnectedSince.IsZero() {
+			connectionDuration = time.Since(metrics.ConnectedSince).Truncate(time.Second).String()
+		}
+
 		stats := StatsResponse{
 			Uptime:                 uptime,
 			TotalMessages:          metrics.TotalMessages,
@@ -451,6 +459,8 @@ func (s *Server) handleStats() http.HandlerFunc {
 			MbitsPerSec:            metrics.BitsPerSec / bitsPerMegabit,
 			WireMbitsPerSec:        metrics.WireBitsPerSec / bitsPerMegabit,
 			Connected:              metrics.Connected,
+			ConnectionDuration:     connectionDuration,
+			ReconnectCount:         metrics.ReconnectCount,
 			GoVersion:              runtime.Version(),
 			Goroutines:             runtime.NumGoroutine(),
 			MemoryUsage:            humanize.Bytes(memStats.Alloc),

internal/templates/status.html

@@ -104,6 +104,14 @@
         
         <div class="status-card">
             <h2>Stream Statistics</h2>
+            <div class="metric">
+                <span class="metric-label">Connection Duration</span>
+                <span class="metric-value" id="connection_duration">-</span>
+            </div>
+            <div class="metric">
+                <span class="metric-label">Reconnections</span>
+                <span class="metric-value" id="reconnect_count">-</span>
+            </div>
             <div class="metric">
                 <span class="metric-label">Total Messages</span>
                 <span class="metric-value" id="total_messages">-</span>
@@ -334,6 +342,8 @@
             document.getElementById('go_version').textContent = '-';
             document.getElementById('goroutines').textContent = '-';
             document.getElementById('memory_usage').textContent = '-';
+            document.getElementById('connection_duration').textContent = '-';
+            document.getElementById('reconnect_count').textContent = '-';
             document.getElementById('total_messages').textContent = '-';
             document.getElementById('messages_per_sec').textContent = '-';
             document.getElementById('total_wire_bytes').textContent = '-';
@@ -392,6 +402,8 @@
                     document.getElementById('go_version').textContent = data.go_version;
                     document.getElementById('goroutines').textContent = formatNumber(data.goroutines);
                     document.getElementById('memory_usage').textContent = data.memory_usage;
+                    document.getElementById('connection_duration').textContent = data.connection_duration;
+                    document.getElementById('reconnect_count').textContent = formatNumber(data.reconnect_count);
                     document.getElementById('total_messages').textContent = formatNumber(data.total_messages);
                     document.getElementById('messages_per_sec').textContent = data.messages_per_sec.toFixed(1);
                     document.getElementById('total_wire_bytes').textContent = formatBytes(data.total_wire_bytes);