fix(bot): normalize GPS reply casing, dedupe channel sender-split

Reuse the existing botChannelSenderSplit() helper for the channel
[LOC]-share sender name instead of re-implementing the same "Name: "
split inline, and fix a stray lowercase "gps:" reply that didn't
match the rest of the !gps command's replies.

examples/companion_radio/MyMesh.cpp

@@ -882,15 +882,10 @@ void MyMesh::onChannelMessageRecv(const mesh::GroupChannel &channel, mesh::Packe
   // chatter is ignored.
   int32_t loc_lat, loc_lon;
   if (_ui && geo::parseLocShare(text, loc_lat, loc_lon)) {
-    char sender[32] = {0};
-    const char* sep = strstr(text, ": ");
-    if (sep && sep > text) {
-      int n = (int)(sep - text);
-      if (n > (int)sizeof(sender) - 1) n = sizeof(sender) - 1;
-      memcpy(sender, text, n);
-      sender[n] = '\0';
-    }
-    _ui->onSharedLocation(nullptr, sender[0] ? sender : "?", loc_lat, loc_lon, timestamp, false);
+    char sender[32];
+    const char* msg;
+    botChannelSenderSplit(text, sender, sizeof(sender), &msg);
+    _ui->onSharedLocation(nullptr, sender, loc_lat, loc_lon, timestamp, false);
   }
 #endif
 

examples/companion_radio/MyMeshBot.h

@@ -300,7 +300,7 @@ bool MyMesh::botCommandReply(const char* cmd, const char* arg, const char* arg2,
       }
       bool on  = !strcmp(arg, "on");   // arg was lowercased while parsing (see botScanCommands)
       bool off = !strcmp(arg, "off");
-      if (!on && !off) { snprintf(out, out_len, "gps: on|off|fix?"); return true; }
+      if (!on && !off) { snprintf(out, out_len, "GPS: on|off|fix?"); return true; }
       // Deferred: applyPendingBotActions() actually flips the GPS state, once
       // quiet-hours/cooldown/throttle have passed (see MyMesh.h).
       _bot_gps_action_pending = true;