Fix info page to show last known position when latest packet has no location data

For stations that send both position and status packets, the info page would show empty location data if the most recent packet was a status packet. This fix ensures the page displays the last known position from the most recent position packet while still showing the latest activity timestamp.

lib/aprsme_web/live/info_live/show.ex

@@ -137,7 +137,37 @@ defmodule AprsmeWeb.InfoLive.Show do
   defp get_latest_packet(callsign) do
     # Get the most recent packet for this callsign, regardless of type
     # This ensures we show the most recent activity, not just position packets
-    Packets.get_latest_packet_for_callsign(callsign)
+    packet = Packets.get_latest_packet_for_callsign(callsign)
+
+    # If this packet doesn't have position data, try to get the latest position packet
+    if packet && (is_nil(packet.lat) || is_nil(packet.lon)) do
+      position_packet = get_latest_position_packet(callsign)
+
+      if position_packet do
+        # Merge position data from position packet into the latest packet
+        %{packet | lat: position_packet.lat, lon: position_packet.lon, location: position_packet.location}
+      else
+        packet
+      end
+    else
+      packet
+    end
+  end
+
+  defp get_latest_position_packet(callsign) do
+    import Ecto.Query
+    # Get the most recent packet with valid position data
+    alias Aprsme.Repo
+
+    Repo.one(
+      from(p in Aprsme.Packet,
+        where: fragment("upper(?)", p.sender) == ^String.upcase(String.trim(callsign)),
+        where: not is_nil(p.lat) and not is_nil(p.lon),
+        order_by: [desc: p.received_at],
+        limit: 1,
+        select: %{p | lat: fragment("ST_Y(?)", p.location), lon: fragment("ST_X(?)", p.location)}
+      )
+    )
   end
 
   defp get_neighbors(nil, _callsign, _locale), do: []

lib/aprsme_web/live/info_live/show.html.heex

@@ -99,7 +99,7 @@
                 </div>
               <% end %>
               <div>
-                <dt class="text-xs font-medium opacity-70">{gettext("Last Position")}</dt>
+                <dt class="text-xs font-medium opacity-70">{gettext("Last Activity")}</dt>
                 <dd class="mt-1 text-sm">
                   <%= if @packet.received_at do %>
                     <div