Try-fix traceroute panic (#8568)

src/modules/TraceRouteModule.h

@@ -7,6 +7,7 @@
 #if HAS_SCREEN
 #include "OLEDDisplayUi.h"
 #endif
+#include <vector>
 
 #define ROUTE_SIZE sizeof(((meshtastic_RouteDiscovery *)0)->route) / sizeof(((meshtastic_RouteDiscovery *)0)->route[0])
 
@@ -49,6 +50,11 @@ class TraceRouteModule : public ProtobufModule<meshtastic_RouteDiscovery>,
     virtual int32_t runOnce() override;
 
   private:
+    void setResultText(const String &text);
+    void clearResultLines();
+#if HAS_SCREEN
+    void rebuildResultLines(OLEDDisplay *display);
+#endif
     // Call to add unknown hops (e.g. when a node couldn't decrypt it) to the route based on hopStart and current hopLimit
     void insertUnknownHops(meshtastic_MeshPacket &p, meshtastic_RouteDiscovery *r, bool isTowardsDestination);
 
@@ -74,6 +80,8 @@ class TraceRouteModule : public ProtobufModule<meshtastic_RouteDiscovery>,
     unsigned long trackingTimeoutMs = 10000;
     String bannerText;
     String resultText;
+    std::vector<String> resultLines;
+    bool resultLinesDirty = false;
     NodeNum tracingNode = 0;
     bool initialized = false;
 };