fix(ui): не подставлять выдуманный cost соседа OSPF

app/(main)/ospf/page.tsx

@@ -64,7 +64,7 @@ interface OspfNeighbor {
   remoteRouterId: string
   area: string
   state: OspfNeighborState
-  cost: number
+  cost: number | null
   uptime: string
   priority: number
   dataUnknown?: boolean
@@ -152,7 +152,7 @@ function backendToNeighbor(b: BackendNeighbor, ifaceMap: Map<string, number>): O
     remoteRouterId: b.routerId,
     area:           b.areaId !== b.area ? `${b.area} (${b.areaId})` : b.area,
     state,
-    cost:           ifaceMap.get(costKey) ?? 10,
+    cost:           ifaceMap.get(costKey) ?? null,
     uptime:         b.uptime ?? "—",
     priority:       b.priority,
   }
@@ -298,7 +298,7 @@ const EDGE_COLOR: Record<string, string> = {
 }
 
 interface GraphNode { id: string; label: string; short: string; site: string; x: number; y: number }
-interface GraphEdge { from: string; to: string; state: OspfNeighbor["state"]; cost: number }
+interface GraphEdge { from: string; to: string; state: OspfNeighbor["state"]; cost: number | null }
 
 // Mock topology (static layout for mock mode)
 const MOCK_GRAPH_NODES: GraphNode[] = [
@@ -459,7 +459,7 @@ function TopologyGraph({ graphNodes, graphEdges, highlightId, selectedId, showDo
               <rect x="-15" y="-10" width="30" height="18" rx="4"
                 fill="#060d1a" stroke={color} strokeWidth="0.8" opacity="0.95" />
               <text textAnchor="middle" y="4" fontSize="8.5" fontWeight="700"
-                fill={color} fontFamily="ui-monospace,monospace">{e.cost}</text>
+                fill={color} fontFamily="ui-monospace,monospace">{e.cost ?? "—"}</text>
             </g>
           </g>
         )
@@ -613,7 +613,7 @@ function NodeDetailPanel({
                 <span className="size-1.5 rounded-full shrink-0 mt-1.5" style={{ background: ec }} />
                 <div className="flex-1 min-w-0">
                   <p className="text-xs font-mono font-medium text-[#f1f5f9] truncate leading-tight">{adj.peerLabel}</p>
-                  <p className="text-[10px] font-mono text-[#64748b] mt-0.5">{adj.iface} · cost {adj.cost}</p>
+                  <p className="text-[10px] font-mono text-[#64748b] mt-0.5">{adj.iface} · cost {adj.cost ?? "—"}</p>
                   <p className="text-[10px] text-[#475569] mt-0.5 tabular-nums">{adj.uptime}</p>
                 </div>
                 <span className="text-[10px] font-mono font-semibold shrink-0 mt-0.5" style={{ color: ec }}>{adj.state}</span>