fix: nil guard for QueryTodaySummary, correct remoteAddr comment and UI

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/channels/quota.go

@@ -265,6 +265,9 @@ func (qc *QuotaChecker) Usage(ctx context.Context) QuotaUsageResult {
 // QueryTodaySummary fills today's aggregate stats into the result.
 // Exported so QuotaMethods can call it directly when QuotaChecker is nil.
 func QueryTodaySummary(ctx context.Context, db *sql.DB, result *QuotaUsageResult) {
+	if db == nil {
+		return
+	}
 	now := time.Now().UTC()
 	startOfDay := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, time.UTC)
 

internal/gateway/client.go

@@ -26,7 +26,7 @@ type Client struct {
 	mu            sync.Mutex
 
 	connectedAt time.Time // when the client connected
-	remoteAddr  string    // peer IP:port from websocket
+	remoteAddr  string    // peer IP (extracted from proxy headers or RemoteAddr)
 
 	// Browser pairing state
 	pairingCode    string // 8-char code if pending approval

ui/web/src/pages/overview/overview-page.tsx

@@ -621,7 +621,7 @@ export function OverviewPage() {
                           className={`border-b last:border-0 ${isYou ? "bg-muted/50" : ""}`}
                         >
                           <td className="py-2 pr-3 font-mono text-xs">
-                            {c.remoteAddr.replace(/:\d+$/, "")}
+                            {c.remoteAddr}
                             {isYou && (
                               <Badge
                                 variant="info"